CN101745519A - Agricultural safety production operating method by utilizing low cadmium-accumulation Chinese cabbage - Google Patents
Agricultural safety production operating method by utilizing low cadmium-accumulation Chinese cabbage Download PDFInfo
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Abstract
The invention relates to the crop safety production technology of cadmium pollution soil environment, in particular to a method by utilizing low cadmium-accumulation Chinese cabbage breed-beijing new No.3 to carry out safety production in the cadmium pollution soil; the low cadmium-accumulation Chinese cabbage is planted in the cadmium pollution soil, the cadmium enriched in the pollution soil is adsorbed by the upper part of the low cadmium-accumulation Chinese cabbage in a repelling way, the root part is used for adsorbing the cadmium in the soil fixedly, so as to prevent the cadmium from being transferred to the overground part upwards; the Chinese cabbage at the overground part is taken as safety vegetables for eating or selling, the root part is treated properly, so as to ensure the vegetable food safety and utilize the non-edible parts (root parts) to fixedly adsorb a great amount of cadmium in the soil; by repeatedly planting the vegetable crops, the processes are repeated, the excessive cadmium in the pollution soil can be extracted continuously, and the cadmium content at the edible part of the Chinese cabbage meets the no-polluted safety vegetable standard; the method has the advantages of low expense, not damaging the physicochemical property of the soil, no secondary pollution, and production and treatment in the polluted soil at the same time.
Description
Technical field
The present invention relates to the crops safety production technique of cadmium pollution soil environment, specifically a kind of method of utilizing low cadmium-accumulation type Chinese cabbage in the cadmium pollution soil safety in production, it is a rejection mechanism of utilizing low heavy metal cadmium accumulation Chinese cabbage, still can reach the method for safety in production in middle low degree cadmium pollution soil.
Background technology
In recent years, along with developing rapidly of China's industrial and agricultural production, the cadmium in China's soil environment (cadmium) pollutes serious day by day.Numerous mankind's activities, such as large scale mining smelting, plating, sewage irrigation and applying sludge and contain use of cadmium agricultural chemicals and chemical fertilizer etc., making a large amount of cadmiums discharge is accumulated in the environment, cause extensive and serious Cadmium Pollution in Soils [document 1: Zhou Qixing, Huang Guohong. environmental biogeochemistry and global environmental change [M]. Beijing: Science Press, 2000.].It is reported, it all is typical heavy metal cadmium district that the Sha Chuan irrigated area in scholar irrigated area, Shanghai etc. is opened by mining area, Dayu, Jiangxi, Shenyang City, severe contamination area (cadmium content of producing grain surpass food hygienic standard several times even tens of times) accounts for [document 2: Xu Aichun more than 10%, Chen Yitai. the adjusting of cadmium pollution soil rhizospheric environment and phytoremediation progress. Chinese soil and fertilizer, 2007, (2): 1～6.].Cadmium excessive in the contaminated soil not only directly threatens existent environment of people and food security, can also be by directly contacting or by food chain enrichment in human body, produce slow poisoning, influence the metabolism of interior calcium of body and phosphorus, cause the pathological change of kidney, bone, liver, bring out the multiple disease of bone, digestive system, urinary system, and can cause malignant tumour.Therefore, repairing and treating is demanded in the cadmium pollution in the soil environment urgently.
The technology that can be used for the repairing and treating heavy metal pollution of soil at present is a lot, and physics such as local method, soil moved in to improve the original method, electrochemical process or chemical method etc. are administered and mainly adopt soil solidification, vitrifying, leaching method, washed to traditional heavy-metal contaminated soil.These methods exist following shortcoming: (1) cost height, one hectare heavy metal pollution soil be often up to tens million of US dollar, and be difficult to extensive use; (2) destroy ecological environment of soil, cause soil texture forfeiture, biological activity of soil to descend and soil fertility degeneration, often need to carry out after-treatment; (3) secondary pollution, utilization physics, chemical method often can cause pollution once more to soil again to the process of heavy metal pollution soil remediation.Therefore, generally be difficult in actual applying in the contaminated soil repairing and treating that area is big, degree is light.
Compare with these traditional improvement technology, the phytoremediation technology that rises from the eighties in last century is as the green recovery technique of a kind of original position, have expense cheap, do not destroy environment, do not cause secondary pollution, be easy to be advantages such as people are accepted, become the research and application focus [document 3: Zhou Qixing of environmental science gradually, Song Yufang. contaminated soil is repaired principle and method [M] Beijing: Science Press, 2004.].But phytoremediation also exists following distinct disadvantage and deficiency: (1) hyperaccumulative plant biomass is less and have a tangible Regional Distribution; (2) repairing efficiency is long, needs to go up century-old usually; (3) degree of depth of phytoremediation contaminated soil is limited, soil that only can the rehabilitation plant root system degree of depth.Therefore, the restriction that is subjected to these factors of the very big degree of phytoremediation technology still is difficult to the actual popularization (document 4: Liu Weitao in China at present, Zhang Yinlong, old Zhe is quick etc. and the plantation in mining area trees are to the absorption and the distribution [J] of cadmium and zinc. Chinese Journal of Applied Ecology, 2008,19 (4)): 752～756.).In view of the actual national conditions of China, large tracts of land mild or moderate polluted agricultural land is stopped farming, it obviously is unpractical carrying out long phytoremediation or adopting expensive engineering reparation.
Scientist discovers that not only there is interspecific difference in plant to the absorption and accumulation of cadmium, also has significant intraspecies variation.Thereby screening and cultivate rejection and the variety of crops of harmful elements such as low accumulation soil cadmium, the safety in production that guarantees agricultural product become one of current the most effective and rational approach.Screening of low heavy metal accumulation crop and the research of cultivating have become a focus of current domestic and international research, numerous results of study show paddy rice (Oryza sativa L.), wheat (Triticum aestivum L.), barley (Hordeum vulgare L.), there is significant difference in the accumulation of corn (Zeamays L.) and peanut crop different genotype such as (Arachis hypogaea L.) with the distribution heavy metal, and filtered out corresponding low heavy metal accumulation genotype (document 5:Arao T., Ishikawa S.Genotypic differences in cadmium concentration and distribution of soybeans and rice[J] .Japanese Agricultural Research Quarterly.2006,40,21～30; Document 6:Zhang G.P., Fukami M., Sekimoto H.Genotypic differences in effects of cadmium on growth andnutrient compositions in wheat[J] .Journal of Plant Nutrition, 2000,23:1337～1350; Document 7:Chen F., Dong J., Wang F., et al.Identification of barley genotypes with low grainCd accumulation and its interaction with four microelements[J] .Chemosphere, 2007,67,2082～2088; Document 8:Florijn P.L., Van Beusichem M.L.Uptake and distribution ofcadmium in maize inbred lines[J] .Plant and Soil, 1993,150:25-32; Document 9:McLaughlinM.J., Bell M.J., Wright G.C., et al.Uptake and partitioning of cadmium by cultivars ofpeanut (Arachis hypogaea L.) Plant and Soil, 2000,222 (1-2): 51～58.).Yet also less about the research of low accumulation heavy metal vegetable variety at present, the Chinese cabbage cultivar of low accumulation cadmium does not appear in the newspapers as yet.There are some researches show, the cadmium 70% that enters human body comes from vegetables (the document 10:Ryan J.A. that is subjected to cadmium pollution, PahrenH.R., Lucas J.B.Controlling cadmium in the human chain:A review and rationalebased on health effects[J] .Environmental Research.1982,28:251～302.).Therefore, screen and utilize the low heavy metal accumulation Chinese cabbage in, the safety in production of slight cadmium pollution soil has theory and realistic meaning, also caused showing great attention to of relevant department.
Chinese cabbage (Brassica Pekinensis L.) belongs to the Cruciferae Brassica plants, is typical low temperature long-day biennial plant, is a kind of popular vegetables of the Northeast and even national common cultivated, also is crucial industrial crops.According to statistics, Chinese cabbage is the vegetable crop of China's cultivated area maximum, about year, cultivated area 2,670,000 public affairs were inclined, account for 15% of the total cultivated area of national vegetable crop, the gross annual output amount is above 100,000,000 tons, account for national vegetables total output 18.8% (document 12: the .2005 of Ministry of Agriculture sowing of vegetable area in all parts of the country and output [J]. China's Vegetable, 2007, (1): 40～41.).Therefore, utilize low accumulation cadmium Chinese cabbage in contaminated soil, to keep the safety in production and have urgency and necessity.
Chinese cabbage originates in China, the cultivation history in more than 1500 year has been arranged, germ plasm resource is extremely abundant, utilize Chinese cabbage rejection mechanism to have the following advantages in safety in production of cadmium pollution agricultural land soil and practice: (1) Chinese cabbage is long and germ plasm resource abundant at China's cultivation history, for screening operation has been established solid foundation; (2) can be restoring cadmium polluted in cadmium pollution soil safety in production, thus reach the purpose of limit production limit improvement, kill two birds with one stone; (3) the Chinese cabbage delicious flavour is nutritious, and the good reputation of " kings of hundred dishes " is arranged, and liked by the common people; (4) China's traditional Chinese medical science is thought, Chinese cabbage be slightly cold the flavor sweet, have that nourishing the stomach to improve the production of body fluid, relieving restlessness are quenched one's thirst, diuresis defaecation, preventing phlegm from forming and stopping coughing, clearing heat and detoxicating effect (5) Chinese cabbage be the important industrial crops of China, export all states in Japan, Korea S, Southeast Asia, European Union and North America, promoted China's economic development and foreign exchange earning; (5) China people have accumulated abundant dabaicai zaipei managerial experiences in long-term agricultural production, make the safety in production of low accumulation cadmium Chinese cabbage in cadmium pollution soil that sufficient agricultural technology guarantee arranged.Therefore, the safety in production that filters out the Chinese cabbage cultivar of low accumulation cadmium in much breeds of Chinese cabbage and be used for contaminated soil of comforming is fully feasible.
Summary of the invention
The purpose of this invention is to provide a kind of method of utilizing the Chinese cabbage of low accumulation cadmium in the cadmium pollution soil safety in production, utilize Chinese cabbage Beijing of low accumulation cadmium in cadmium pollution soil, to keep the safety in production for new No. 3.
For achieving the above object, technical scheme of the present invention is:
Utilize the methods of the new No. 3 agricultural safety in production in low cadmium-accumulation Chinese cabbage Beijing: new No. 3 of Chinese cabbage Beijing of the low accumulation of plantation cadmium in cadmium pollution soil, repair on production limit, limit, realizes removing the purpose of excessive cadmium in the soil.
The described Chinese cabbage of planting in cadmium pollution soil is new No. 3 of Beijing, and this Chinese cabbage is the vegetable crop of low heavy metal cadmium accumulation.Described in cadmium pollution soil the plantation this Chinese cabbage, be meant with the direct bunch planting of this kind Chinese cabbage seed in cadmium pollution soil every cave 3-6 grain Chinese cabbage seed, cave spacing 10-60cm, distance between the ridges 10-60cm.This Chinese cabbage of planting in cadmium pollution soil is adopted outdoor potted plant cultivation and open-air field production, and plantation Chinese cabbage Beijing is new No. 3 in pot experiment, be meant new No. 3 seeds in Beijing directly are seeded in the plastic tub (
H=15cm), last final singling 2 strains of every basin.The concentration (mg/kg) that adds cadmium is 0,1,2.5 and 5.Regularly water, make soil moisture content remain on the 40-90% of field capacity.This Chinese cabbage of plantation in cadmium pollution soil, this Chinese cabbage overground part repels cadmium in the absorption contaminated soil, and cadmium is fixed, adsorbed to root simultaneously, thereby stop it to shift to overground part; When 60-85 days maturations of Chinese cabbage growth, the Chinese cabbage overground part is gathered in the crops from contaminated soil, after being removed, root deals carefully with, treat to plant second batch next growth period again, repeat aforesaid operations.Described each harvested Chinese cabbage root focuses on specially, and the method for processing comprises after lead or compression are reclaimed in burning, extraction makes innoxious landfill.
Producing of the new No. 3 Chinese cabbage seeds in described Beijing by national vegetables Engineering Technical Research Centre and Beijing Jingyanyinong Technology Development Center's joint research and development.
Among the present invention, new No. 3 Chinese cabbages in Beijing are the Chinese cabbage cultivar of low accumulation cadmium, and its plant gene feature and chemical feature are as follows: 60-85 days breeding time, growing way is more prosperous, neat and consistent, siphonal lobe is dark green, page pin wrinkle, and degree of development is less, the leaf-head king-pile is folded to be embraced, later stage high aspiration speed is fast, and balling is tight, about 4 kilograms of individual plant net weight.Disease-resistant toxication, mould rotten sick, downy mildew, quality better, anti-accumulating, per mu yield clean vegetables 7000-8000 kilogram.
According to the cadmium pollution soil fertility state, use nitrogen, phosphorus and the potash fertilizer etc. that promote this Chinese cabbage growth.This Chinese cabbage of planting in cadmium pollution soil is adopted outdoor potted plant cultivation and open-air field production, regularly waters, and makes soil moisture content remain on the 40-90% of field capacity, and attention control cabbage caterpillar, aphid and ground maggot.
Chinese cabbage of the present invention Beijing belongs to the Cruciferae Brassica plants new No. 3, is typical low temperature long-day biennial plant, has very high nutritive value and economic worth.It both can directly be seeded in contaminated soil, also can cultivation by setting seedlings and growth rapidly, cultivation management is more simple and easy to operate with respect to other crops, is the very strong vegetables industrial crops of a kind of adaptability.Experiment shows that Beijing is a kind of Chinese cabbage cultivar of low accumulation cadmium new No. 3, and the cadmium poisoning in the soil is had the production standard that very strong patience, its overground part cadmium content are lower than the national security vegetables.
The new green vegetables that can be used as for No. 3 in Beijing of results are edible for people, also sell on the market at home or export to foreign countries, thereby embody its higher edibility and economic worth; In addition, can focus on the Pemisetum flaccidum Griseb of gathering in the crops, perhaps security landfill is perhaps carried out resource processing and is handled, and reclaims cadmium wherein, can avoid secondary pollution, produces certain economic benefits simultaneously.
Advantage of the present invention and beneficial effect are as follows:
1. the inventive method is compared with traditional contaminated soil improvement method, has small investment, workload is little, specification requirement is not high, ecological security is high, do not produce advantages such as secondary pollution.
2. the present invention has good economy, environment and ecological benefits.The inventive method is as a kind of safety production technique of contaminated soil, and the Chinese cabbage overground part cadmium content of gathering in the crops is lower than relevant national standard, and edible this Chinese cabbage can not produce harm to human body, can obtain high economic benefit by selling this Chinese cabbage; New No. 3 roots in Chinese cabbage Beijing are focused on, can not cause secondary pollution, fixedly reparation process not only can not destroyed ecological environment of soil simultaneously, also helps to improve the soil degradation that causes because of heavy metal pollution and productivity and descends, and recovers and improves its bio-diversity.
Description of drawings
Fig. 1 is that new No. 3 overground part and the root biomass in Beijing detects figure under the cadmium of variable concentrations is handled.
The specific embodiment
Embodiment 1: affirmation and the simulation application of the Chinese cabbage of low accumulation cadmium under the potted plant gradient
Potted plant experiment place is located in the ecological station, Chinese Academy of Sciences Shenyang, and this station is located in the central area of Base of Liaohe Plain down, apart from the about 35km in urban district, Shenyang, belongs to warm temperate zone half moistening continental climate.Experiment does not have pollution sources around the place, is the uncontaminated district of heavy metal.Pot experiment soil picks up from the topsoil (0-20cm) of pollution-free area in the ecological station, Chinese Academy of Sciences Shenyang, and soil types is a meadow burozem, and the heavy metal in soil cadmium content is 0.17mg/kg.
4 processing are established in this experiment altogether, and each is handled and repeats 3 times, and the cadmium concentration that adds (mg/kg) is respectively: 0 (contrast does not add), 1,2.5 and 5.The cadmium that experiment adds is analytically pure CdCl
22.5H
2O, and apply certain density nitrogen, phosphorus, potash fertilizer as base fertilizer: 0.25g/kgN (CO (NH
2)
2), 0.065g/kgP and 0.124g/kg K (K
2HPO
4).After will crossing the 4mm sieve for examination soil is air-dry, admix cadmium and base fertilizer with solid form, the plastic tub of fully packing into behind the mixing (
H=15cm) in, every basin is adorned native 2.5kg, and balance 8-12 week is stand-by.The Chinese cabbage seed directly is seeded in the basin, every basin sowing 3-6 grain, the week back thinning of waiting to germinate is stayed two strains according to the every basin of Chinese cabbage seedling growing way.Pour into an amount of running water according to soil water regime in the basin every day, and soil moisture content is often remained on about the 40-90% of field capacity.
The plant growth was gathered in the crops plant after 60-85 days.To gather in the crops sample and be divided into root and overground part two parts, and fully wash with removal with running water respectively and adhere to earth and dirt on the plant sample, and then use deionized water rinsing, the drop branch that anhydrates, complete 1 hour at 105 ℃; Under 65 ℃, dry then, pulverize standby after the weighing dry weight to weight.Plant sample adopts HNO
3-HClO
4Method digestion (the two volume ratio is 87: 13) is with atomic absorption spectrophotometer cadmium content wherein.
Experimental result is as follows:
New No. 3 overground part and the root biomass in Beijing under the Cd that Fig. 1 has provided at above-mentioned variable concentrations handles.ANOVA showed significant, compare with contrast (Cd 0), Cd add concentration be 1,2.5 and the processing of 5mg/kg in, new No. 3 overground parts in Beijing and root biomass all significantly descend, show very strong patience, Cd concentration has certain facilitation less than the processing of 2.5mg/kg even to its growth.But under the very high situation of Cd pollution concentration, when promptly the Cd concentration of treatment was 5mg/kg, overground part and root biomass had decline slightly, but for to the level of signifiance (P＞0.05), had also shown bigger Cd patience.
Referring to table 1 as can be known, along with the increase that adds Cd concentration in the soil, the Cd concentration of new No. 3 overground parts in Beijing and root progressively raises, and its concentration coefficient and transfer ratio also have trend of rising.But in all Cd handle, new No. 3 overground part Cd concentration coefficients in Beijing (ratio of Cd content in overground part and the soil) and transfer ratio (ratio of overground part and root Cd content) are all the time less than 1, be that overground part Cd content is lower than in the soil and the Cd content of root all the time, possessed typical C d rejection plant characteristics.It is 90% that this test records the new No. 3 overground part average moisture contents in Chinese cabbage Beijing.And the maximum permissible level of agricultural product security quality pollution-free vegetable safety requirements (GB18406.1-2001) Cd (MPC) is 0.05mg/kg fresh weight (FW), and Chinese cabbage overground part cadmium content surpasses 0.50mg/kg dry weight (DW) and thinks that promptly Cd exceeds standard.According to this standard, when soil Cd concentration＜2.5mg/kg, the new No. 3 overground part Cd content in Beijing satisfy the production requirement of national pollution-free vegetable all less than 0.50mg/kg.When soil Cd concentration 〉=2.5mg/kg, the new No. 3 overground part Cd content in Beijing have surpassed national standard.
Above-mentioned experimental result shows, Cd adds concentration when being lower than 2.5mg/kg in soil, the new No. 3 overground part cadmium contents in Beijing are lower than the standard of the production requirement of national pollution-free vegetable all the time, and overground part Cd content is lower than root and soil Cd content all the time, simultaneously Cd is polluted and show stronger patience, the feature that has possessed the low enriching plant of Cd fully is the low enriching plant of a kind of Cd.And its root Cd content shows the stronger absorption fixation to Cd all greater than Cd content in the soil.Beijing is new to be had very strong patience, overground part to repel to Cd No. 3 to absorb Cd, the fixing absorption of root Cd, and stops it on overground part to be transported, and these features make it keep the safety in production at low Cd contaminated soil, and progressively removes Cd excessive in the soil and become possibility.
New No. 3 the low accumulation characteristics in Beijing under the potted plant experiment condition of table 1 to Cd
| Concentration of treatment (mg/kg) | Overground part (mg/kg) | Root (mg/kg) | The overground part concentration coefficient | Transfer ratio |
| ??0 | ??0.08 | ??0.38 | ??0.21 | |
| ??1 | ??0.22 | ??1.96 | ??0.22 | ??0.11 |
| ??2.5 | ??0.90 | ??4.25 | ??0.36 | ??0.23 |
| ??5 | ??3.15 | ??8.62 | ??0.63 | ??0.37 |
Embodiment 2: the safety in production of affirmation of land for growing field crops, irrigated area and cadmium pollution soil is comforted in Shen
The Shen that the experiment place is located at Shenyang City's Dongling District is comforted the experimental plot, irrigated area and is carried out, and the meteorological condition on this ground is stood with Shenyang ecology and relatively is more or less the same.Soil types is a yellowish soil, and its physicochemical property is a pH value 8.5, organic 18.32mg/kg, full N 1.27mg/kg, full P 1.42mg/kg, quick-acting K 145.68mg/kg, total cadmium 1.25mg/kg.With the direct bunch planting of Chinese cabbage seed in cadmium pollution soil, every cave 3-6 grain Chinese cabbage seed, cave spacing 10-60cm, distance between the ridges 10-60cm.According to the rich scarce situation of soil moisture, irregularly water (not detecting Cd in the water) with well water, soil moisture content is often remained on about the 40-90% of field capacity; Be to promote the Feng Yuan growth, apply urea according to the consumption of 300kg/ hectare.Wait to grow and gathered in the crops Beijing in 60-85 days later on new No. 3, sample treatment is with embodiment 1.
Experimental result is as follows:
Table 2 provided Beijing, different Cd concentration sub-district new No. 3 to Cd low accumulation feature and growing state.The new No. 3 overground part content in Beijing all are lower than 0.50mg/kg, the standard (GB18406.1-2001) that meets the nuisanceless safe vegetables of country, its overground part Cd content is far below root, and concentration coefficient is all less than 1, can be used as the low accumulation Chinese cabbage of Cd popularizing planting in the agricultural land soil that mild or moderate pollutes, and can not work the mischief health.According to the average dry weight conversion of the root of measuring, under the level of pollution of Cd 1.25mg/kg, the dry matter production of the root that Beijing is new No. 3 can reach the 9.05kg/ hectare, can remove Cd excessive in the soil thereby the cadmium of taking away from soil is the 16.29mg/ hectare to a certain extent by the new No. 3 continuous production in Beijing.Hence one can see that, utilize Beijing new No. 3 on slight Cd (cadmium content is 0.5-2.5mg/kg) contaminated soil, limit safety in production, limit rehabilitating soil cadmium pollution are that reality is feasible.
Beijing new No. 3 low accumulation feature and upgrowth situations under the table 2 field experiment condition to Cd
| The Chinese cabbage strain | Overground part contains Cd (mg/kg) | Root contains Cd (mg/kg) | The overground part concentration coefficient | Overground part dry weight (g/ strain) | Root dry weight (g/ strain) |
| ??1 | ??0.23 | ??1.88 | ??0.18 | ??58.72 | ??11.76 |
| ??2 | ??0.27 | ??1.69 | ??0.22 | ??66.96 | ??12.43 |
| ??3 | ??0.34 | ??2.23 | ??0.27 | ??57.13 | ??15.29 |
| ??4 | ??0.35 | ??2.12 | ??0.27 | ??63.22 | ??14.36 |
| ??5 | ??0.26 | ??1.65 | ??0.20 | ??68.33 | ??11.23 |
| ??6 | ??0.22 | ??1.99 | ??0.18 | ??65.24 | ??16.45 |
| ??7 | ??0.33 | ??2.08 | ??0.27 | ??57.15 | ??17.04 |
| ??8 | ??0.35 | ??1.78 | ??0.27 | ??65.82 | ??10.88 |
| ??9 | ??0.41 | ??2.13 | ??0.29 | ??61.29 | ??13.41 |
| ??10 | ??0.39 | ??2.45 | ??0.28 | ??66.15 | ??18.44 |
Embodiment result shows, the present invention utilizes low accumulation Cd Chinese cabbage overground part to repel the Cd that absorbs in the enrichment contaminated soil, Cd in the fixing absorption of the root soil, thereby stop it upwards to be transported to overground part, with the whole results of Chinese cabbage, overground part is edible or sale as safe vegetables when Chinese cabbage grows into 60-85 days, and root gives other and deals carefully with, thereby promptly can ensure vegetable food safety, can utilize a large amount of Cd in the fixing absorption in non-edible position (root) soil again; By planting this kind vegetable crop repeatedly, repeat said process, just can extract Cd excessive in the contaminated soil continuously, and the Cd content at the edible position of Chinese cabbage also satisfies the standard of nuisanceless safe vegetables.It is low that this method has expense, do not destroy the physicochemical property of soil, non-secondary pollution, and have advantages such as limit production, limit improvement in contaminated soil.
Claims (6)
1. methods of utilizing the new No. 3 agricultural safety in production in low cadmium-accumulation Chinese cabbage Beijing is characterized in that: new No. 3 of Chinese cabbage Beijing of the low accumulation of plantation cadmium in cadmium pollution soil, repair on production limit, limit, realizes removing the purpose of excessive cadmium in the soil.
2. according to the described method of utilizing the new No. 3 agricultural safety in production in low cadmium-accumulation Chinese cabbage Beijing of claim 1, it is characterized in that: the described Chinese cabbage of planting in cadmium pollution soil is new No. 3 of Beijing, and this Chinese cabbage is the vegetable crop of low heavy metal cadmium accumulation.
3. according to the described method of utilizing the new No. 3 agricultural safety in production in low cadmium-accumulation Chinese cabbage Beijing of claim 1, it is characterized in that: described in cadmium pollution soil the plantation this Chinese cabbage, be meant the direct bunch planting of this kind Chinese cabbage seed in cadmium pollution soil, every cave 3-6 grain Chinese cabbage seed, cave spacing 10-60cm, distance between the ridges 10-60cm.
4. implement the method that agricultural product security is produced new No. 3 according to the described low cadmium-accumulation Chinese cabbage Beijing that utilizes of claim 1, it is characterized in that: this Chinese cabbage of in cadmium pollution soil, planting, adopt outdoor potted plant cultivation and open-air field production, regularly water, make soil moisture content remain on the 40-90% of field capacity.
5. implement the method that agricultural product security is produced new No. 3 according to the described low cadmium-accumulation Chinese cabbage Beijing that utilizes of claim 1, it is characterized in that: this Chinese cabbage of plantation in cadmium pollution soil, this Chinese cabbage overground part repels cadmium in the absorption contaminated soil, cadmium is fixed, adsorbed to root simultaneously, thereby stop it to shift to overground part; When 60-85 days maturations of Chinese cabbage growth, the Chinese cabbage overground part is gathered in the crops from contaminated soil, after being removed, root deals carefully with, treat to plant second batch next growth period again, repeat aforesaid operations.
6. by the described method of utilizing the new No. 3 agricultural safety in production in low cadmium-accumulation Chinese cabbage Beijing of claim 1, it is characterized in that: described each harvested Chinese cabbage root focuses on specially, and the method for processing comprises after lead or compression are reclaimed in burning, extraction makes innoxious landfill.
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| CN110639947A (en) * | 2019-09-27 | 2020-01-03 | 中国计量大学 | Test method for verifying reduction of cadmium absorption of Chinese cabbages |
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| CN103109651A (en) * | 2011-11-16 | 2013-05-22 | 中国科学院沈阳应用生态研究所 | Method of producing while recovering for cadmium-polluted vegetable field |
| CN103250539A (en) * | 2013-05-16 | 2013-08-21 | 农业部环境保护科研监测所 | Method for reducing absorption of cadmium by rape |
| CN107889840A (en) * | 2017-11-15 | 2018-04-10 | 陕西理工大学 | A kind of hardening agent for strengthening super enriching plant cadmium pollution soil repair and its application |
| CN107889840B (en) * | 2017-11-15 | 2020-06-16 | 陕西理工大学 | Enhancer for enhancing hyperaccumulation plants to restore cadmium-contaminated soil and application thereof |
| CN110496852A (en) * | 2018-05-16 | 2019-11-26 | 沈阳药科大学 | A kind of method of cadmium pollution soil repair |
| CN109622593A (en) * | 2018-12-06 | 2019-04-16 | 钦州学院 | A kind of biological renovation method of cadmium pollution soil |
| CN110639947A (en) * | 2019-09-27 | 2020-01-03 | 中国计量大学 | Test method for verifying reduction of cadmium absorption of Chinese cabbages |
| CN113600609A (en) * | 2021-07-30 | 2021-11-05 | 山东省农业科学院 | Crop restoration method for reducing cadmium content in soil |
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