CN105777351B - Preparation method of pig manure fermentation-free low-cost organic fertilizer - Google Patents
Preparation method of pig manure fermentation-free low-cost organic fertilizer Download PDFInfo
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- CN105777351B CN105777351B CN201610152511.4A CN201610152511A CN105777351B CN 105777351 B CN105777351 B CN 105777351B CN 201610152511 A CN201610152511 A CN 201610152511A CN 105777351 B CN105777351 B CN 105777351B
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F5/00—Fertilisers from distillery wastes, molasses, vinasses, sugar plant or similar wastes or residues, e.g. from waste originating from industrial processing of raw material of agricultural origin or derived products thereof
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Abstract
The invention relates to a preparation method of a pig manure fermentation-free low-cost organic fertilizer, which comprises the following steps: (1) collecting pig manure, adding a modifier into the pig manure, then adding a deodorant into the pig manure, and uniformly stirring to obtain modified pig manure; (2) selecting mushroom residues without wood chips after the cultivation of edible mushrooms, adjusting the water content, and carrying out aerobic fermentation to prepare fermented mushroom residues; (3) uniformly mixing urea, diammonium phosphate, potassium sulfate, fermentation fungus dregs, soybean meal powder, aminated lignite and a shaping agent to prepare an auxiliary material; (4) and (3) carrying out solid-liquid separation on the modified pig manure, drying the solid, then adding auxiliary materials, and uniformly mixing to obtain the fermentation-free low-cost organic fertilizer of the pig manure. The pig manure fermentation-free low-cost organic fertilizer disclosed by the invention is not subjected to composting fermentation, has high crude fiber content, lower density and large biochemical potential of raw materials, and is favorable for improving the air permeability, fertilizer retention and water retention of soil after being applied to the soil.
Description
Technical Field
The invention relates to a preparation method of a low-cost organic fertilizer by using pig manure without fermentation, in particular to a method for preparing a low-cost organic fertilizer by using functional modifiers to treat manure in a large-scale pig farm, and belongs to the technical field of recycling of breeding manure.
Background
With the development of livestock and poultry breeding industry, the intensification degree is higher and higher, and the specialization characteristics are more and more obvious. The excrement can not be used as fertilizer in the breeding field; the land is not used for cultivation any more, agricultural production depends on chemical fertilizer, and the proportion of the livestock and poultry manure used as farmland fertilizer is greatly reduced. This has led to an increasing separation of the breeding and planting industries, with the chain of the circulating agriculture being interrupted. The pig farm excrement has the characteristics of large water content, strong fluidity, high viscosity, serious pathogenic hazard and the like, so that the pig farm excrement is the type with the worst resource utilization degree in the livestock and poultry breeding excrement.
Chinese patent document CN102887738A (application number: 201210427018.0) discloses a technology for preparing pig manure organic fat pigs by using mixed fermentation of pig manure, probiotic liquid, corn flour, vinasse and the like, but the materials are mixed and stirred uniformly with great difficulty, the fermentation process is long, and the method is not suitable for large-scale production; chinese patent document CN103951474A (application number: 201410218669.8) discloses that biological bacteria, molasses and water are mixed and fermented to obtain zymocyte liquid, then the zymocyte liquid is mixed into a mixture of pig manure, calcium superphosphate, rice hulls, wood dust and the like, and then the mixture is piled up and fermented to prepare an organic fertilizer; chinese patent document CN201933024U (application number: 201120026726.4) discloses a technical process for solving the mechanized fermentation of pig manure by using a mechanical technology, but the operation effect of equipment is difficult to guarantee; chinese patent document CN103708967A (application No. 201310746826.8) discloses a method for preparing an organic fertilizer by carrying out dry-wet separation on pig manure and then carrying out dynamic-continuous high-temperature fermentation on the pig manure by microorganisms; chinese patent document CN204237690U (application number: 201420684909.9) discloses a fermentation device special for pig manure.
The problem of organic matter shortage of current farmland soil is severe day by day, and the price of organic fertilizer is too high instead of organic fertilizer shortage on the market. From the above technologies, it can also be seen that although the technology of preparing organic fertilizer from livestock and poultry manure is a research focus, many researches do not consider the practicability of the technology: either the equipment investment is expensive, the fermentation and composting process is complicated, or the additional cost of the product is too high, so that the price of the produced organic fertilizer exceeds the bearing capacity of farmers.
Chinese patent document CN 101659582 (application number: 200910114370.7) discloses a method for rapidly converting livestock and poultry manure into a high-efficiency fertilizer, which is a technology for rapidly preparing the fertilizer without fermentation, and the technology adopts high-concentration sulfuric acid as an acidifier, hydrolyzes under the condition of heating and stirring at 70-80 ℃, and prepares the high-efficiency organic fertilizer by mixing fillers. However, the fertilizer efficiency of the organic fertilizer prepared by the method is slow to take effect, and the requirement of crop growth cannot be met.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation method of a pig manure fermentation-free low-cost organic fertilizer.
The technical scheme of the invention is as follows:
a special functional modifier for preparing a pig manure fermentation-free organic fertilizer comprises hydroxypropyl methacrylate (HPMA), calcium hydroxide and potassium dihydrogen phosphate.
According to the invention, the modifier comprises the following components in parts by weight:
1-5 parts of hydroxypropyl methacrylate (HPMA), 95-99 parts of calcium hydroxide and 95-100 parts of monopotassium phosphate.
According to the invention, the modifier comprises the following components in parts by weight:
1 part of hydroxypropyl methacrylate (HPMA), 99 parts of calcium hydroxide and 100 parts of potassium dihydrogen phosphate.
A preparation method of a pig manure fermentation-free low-cost organic fertilizer comprises the following steps:
(1) collecting pig manure according to the proportion of 0.3-0.8 kg/m3Adding a modifier into the pig manure, then adding a deodorant into the pig manure, and uniformly stirring to obtain modified pig manure;
(2) selecting mushroom residues without sawdust after the cultivation of edible mushrooms, adjusting the water content to 55-65%, and performing aerobic fermentation for more than 14 days to prepare fermented mushroom residues;
(3) uniformly mixing 5-10 parts by weight of urea, 5-8 parts by weight of diammonium phosphate, 6-10 parts by weight of potassium sulfate, 30-40 parts by weight of fermentation fungus dregs prepared in the step (2), 10-20 parts by weight of soybean meal, 20-30 parts by weight of aminated lignite and 5-8 parts by weight of a plasticizer to prepare auxiliary materials;
(4) and (2) carrying out solid-liquid separation on the modified pig manure prepared in the step (1), drying the solid, adding the auxiliary material prepared in the step (3) according to the weight percentage of 20-35%, and uniformly mixing to prepare the fermentation-free low-cost organic fertilizer of pig manure.
According to the invention, the solid content (TS) in the pig manure in the step (1) is preferably 5-8%.
According to the optimization of the method, the modifier in the step (1) is prepared into a modifier solution with the mass concentration of 5-15% and then added into the pig manure.
According to the invention, the deodorant component in the step (1) is preferably as follows, and the deodorant component comprises the following components in parts by weight:
4500-5500 parts of ferrous sulfate, 4500-5500 parts of magnesium sulfate and 0.05-0.15 part of vanillin.
According to the invention, the addition amount of the deodorant in the step (1) is preferably 0.3-0.8 kg/m3And preparing the deodorant into a deodorant solution with the mass concentration of 5-15%, and adding the deodorant into the pig manure.
According to the invention, in the step (3), the plasticizer is calcium powder and/or bentonite.
According to the invention, in the step (4), the solid-liquid separation adopts filter pressing, and the aperture of the filter screen is less than or equal to 0.5 mm.
Preferably, in the step (4), the water content of the dried solid is 60-65%.
According to the invention, the method also comprises the steps of granulation, powder screening, metering and packaging.
According to the further optimization of the invention, the granulation adopts an extrusion granulation device with a temperature raising function, the temperature after granulation is kept at 55-65 ℃, and after cooling, the water content of the granules is less than or equal to 28%.
Advantageous effects
1. The pig manure fermentation-free low-cost organic fertilizer disclosed by the invention is not subjected to composting fermentation, the raw material has high crude fiber content, low density and large biochemical potential, and the pig manure fermentation-free low-cost organic fertilizer is beneficial to improving the air permeability, fertilizer retention and water retention of soil after being applied to the soil;
2. the pig manure fermentation-free low-cost organic fertilizer has lower price, and compared with the existing pig manure organic fertilizer, the pig manure fermentation-free low-cost organic fertilizer does not need a composting fermentation process, effectively reduces the period and the working procedure of fertilizer preparation, and can reduce the price by more than 40%;
3. after the pig manure fermentation-free low-cost organic fertilizer is applied, the physical properties of soil can be obviously improved, the chemical properties of the soil can be gradually improved, the microbial flora of the soil can be effectively improved, and the pig manure fermentation-free low-cost organic fertilizer has better organic characteristics compared with the existing commercial organic fertilizer;
4. the invention discloses a modifier consisting of hydroxypropyl methacrylate, potassium dihydrogen phosphate and calcium hydroxide for the first time, which is used for effectively softening pig manure fibers and eluting partial antibiotics, heavy metals and other substances on the basis of maintaining the acid-base balance of a system, is beneficial to drying raw materials and natural breakage of the fibers, and thus improves the commodity and the economical efficiency of organic fertilizer products.
Detailed Description
The technical solution of the present invention is further described with reference to the following examples, but the scope of the present invention is not limited thereto.
Hydroxypropyl methacrylate was purchased from Nanjing hand-in-hand chemical technology, Inc.;
vanillin is available from Shanghai spectral vibration Biotech, Inc., under the brand name "Cramar";
in the embodiment, the gelatinized lignite, urea, diammonium phosphate, potassium sulfate, calcium powder, bentonite, soybean meal powder, calcium hydroxide, monopotassium phosphate and the like are all common commercial products;
example 1
A modifier for preparing a pig manure fermentation-free organic fertilizer comprises the following components in parts by weight:
1 part of hydroxypropyl methacrylate (HPMA), 99 parts of calcium hydroxide and 100 parts of potassium dihydrogen phosphate.
Example 2
A modifier for preparing a pig manure fermentation-free organic fertilizer comprises the following components in parts by weight:
2 parts of hydroxypropyl methacrylate (HPMA), 99 parts of calcium hydroxide and 99 parts of potassium dihydrogen phosphate.
Example 3
A modifier for preparing a pig manure fermentation-free organic fertilizer comprises the following components in parts by weight:
5 parts of hydroxypropyl methacrylate (HPMA), 95 parts of calcium hydroxide and 100 parts of potassium dihydrogen phosphate.
Example 4
The pig farm is implemented in a large-scale pig farm of Shandong province fat city Tianfu Fuzhu pig industry, wherein the pig farm utilizes a water-feces flushing process to clean feces, and the feces flow into a feces storage pool (the pool volume is 5 m)33m of fecal sewage3) Excrement and urineThe content of solid dirt is 6%.
The modifier for preparing the pig manure fermentation-free organic fertilizer in the embodiments 1-3 is respectively adopted to prepare the pig manure fermentation-free low-cost organic fertilizer which is marked as an experimental group 1-3 according to the following method, and meanwhile, the modifier is not added to be used as a control group, and the preparation method of the pig manure fermentation-free low-cost organic fertilizer comprises the following steps:
(1) collecting pig manure according to the proportion of 0.5kg/m3Adding the modifier into the pig manure, preparing a modifier solution with the mass concentration of 10% before adding the modifier, and then 0.5kg/m3Adding a deodorant into the pig manure, preparing a deodorant solution with the mass concentration of 10% before adding the deodorant, and uniformly stirring to obtain modified pig manure;
the deodorant comprises the following components:
5kg of ferrous sulfate, 5kg of magnesium sulfate and 0.1g of vanillin;
(2) selecting leftovers of oyster mushroom cultivation, airing, uniformly stirring, and adding aerobic fermentation inoculum (application amount of 0.1 kg/m)3Purchased from a test station of edible fungus union Jinan, Shandong province), adding water, adjusting the water content to 60%, building a strip stack-shaped natural fermentation with the height of 1.5 m, turning over the stack after 7 days, building the stack, and fermenting for 7 days to obtain fermented fungus residues;
(3) weighing 50kg of urea, 50kg of diammonium phosphate, 50kg of potassium sulfate, 400kg of fermentation fungus residues, 130kg of soybean meal powder, 300kg of aminated lignite and 20kg of calcium powder, and uniformly mixing to obtain auxiliary materials;
(4) and (2) carrying out solid-liquid separation on the modified pig manure prepared in the step (1) (a solid-liquid separator special for small-sized pig manure provided by Shandong fish platform greening environment-friendly energy-saving equipment manufacturing Co., Ltd.), drying the solid until the water content is 60% to prepare 2000kg of pig manure solid, then adding 1000kg of auxiliary materials prepared in the step (3), uniformly mixing, granulating, sieving, metering and packaging to prepare cylindrical particles with the diameter of 1cm and the height of 0.5-0.8cm, namely the pig manure fermentation-free low-cost organic fertilizer.
The granulating is carried out by adopting a granulating machine produced by Shijiazhuang Shengrenli automatic equipment limited company, the temperature after granulating is kept at 55-65 ℃, and the water content of the granules is 25% after cooling.
The sensory and nutrient content measurement results of the prepared pig manure fermentation-free low-cost organic fertilizer are shown in table 1: (control group without modifier)
TABLE 1 product quality and ingredient content
As seen from Table 1, the finished product has slight odor of feces without being treated by the modifier, and the drying of the raw material is difficult, the moisture content of the finished product is as high as 32.33 percent, and the requirement of the commercial organic fertilizer on the moisture content cannot be met; the moisture content of the finished products of the experimental group 1, the experimental group 2 and the experimental group 3 is gradually reduced along with the increase of the application amount of the hydroxypropyl methacrylate, but the lower the application amount is, the safer the application amount is, in consideration of the cost and the environmental safety of the chemical product, so the preferable scheme is obtained.
The cost estimate for the product is shown in table 2.
TABLE 2 cost estimation of products
Note: the total cost of the production of 3 tons of organic fertilizer is more than that, and the total content of nitrogen, phosphorus and potassium in the organic fertilizer is 10.65 percent
As shown in the table 2, the total raw material cost for producing 3 tons of the base fertilizer is 1042 yuan, namely, the raw material cost per ton is about 350 yuan, the nitrogen, phosphorus and potassium items in the organic fertilizer can reach more than 10%, and the cost performance advantage is outstanding.
Experimental example 1
In order to verify the application effect of the pig manure fermentation-free low-cost organic fertilizer in example 4, an application effect test was performed in cultivation of tomatoes in a certain open field in Mazhuang town in Dayue district, Taian City, Shandong, processing 1 to be an organic fertilizer with a certain brand completely fermented, processing 2 to be a pig manure fermentation-free low-cost organic fertilizer in the experimental group 1 of example 4, and 2 fertilizers were applied as base fertilizers at application rates of 6000kg/hm2(both fertilization treatments are quite expensive); other fertilizers, flush fertilizers, etc. are used according to planting habits. Tomato yield in the experimentThe results are shown in Table 3, and the physiological effect on soil after the test is shown in Table 4.
TABLE 3 Effect of products on tomato growth and yield
As can be seen from table 3: compared with the application of other commercial organic fertilizers, the application of the pig manure fermentation-free low-cost organic fertilizer of the embodiment improves the tomato yield by 33.91%, the plant height by 14.71%, the stem thickness by 24.8% and the plant biomass by 31.82%. The pig manure fermentation-free low-cost organic fertilizer can promote the growth of tomatoes and has a remarkable yield increase effect.
TABLE 4 Effect of products on physical Properties of soil
As can be seen from Table 4, after the pig manure fermentation-free low-cost organic fertilizer is applied, compared with the completely fermented organic fertilizer, the volume weight of the soil is reduced by 13.48%, the porosity of the soil is increased by 14.81%, the content of organic matters is increased by 7.82%, the solid phase of the soil is reduced by 6.63%, and the liquid phase and the gas phase are increased by 6.32% and 11.70%, respectively; the reason is that compared with the fermented organic fertilizer, the pig manure fermentation-free low-cost organic fertilizer contains more organic matters such as crude fibers, which are beneficial to loosening soil and providing breeding and enriching food for soil microorganisms, thereby being beneficial to increasing the air content of the soil.
Example 5
A preparation method of a pig manure fermentation-free low-cost organic fertilizer comprises the following steps:
(1) collecting pig manure according to the proportion of 0.8kg/m3Adding a modifier into the pig manure, preparing a modifier solution with the mass concentration of 10% before adding the modifier, and then adding the modifier solution according to the proportion of 0.3kg/m3Adding a deodorant into the pig manure, preparing a deodorant solution with the mass concentration of 10% before adding the deodorant, and uniformly stirring to obtain modified pig manure;
the deodorant comprises the following components:
5kg of ferrous sulfate, 5kg of magnesium sulfate and 0.1g of vanillin;
(2) selecting leftovers of needle mushroom cultivation, airing, uniformly stirring, and adding aerobic fermentation inoculum (application amount of 0.1 kg/m)3Purchased from a test station of edible fungus union Jinan in Shandong province), adding water, adjusting the water content to 65%, building a strip stack-shaped natural fermentation with the height of 1.5 m, turning over the stack after 7 days, building the stack, and fermenting for 10 days to prepare fermented fungus residues;
(3) weighing 50kg of urea, 75kg of diammonium phosphate, 75kg of potassium sulfate, 350kg of fermentation fungus residues, 200kg of soybean meal powder, 200kg of aminated lignite and 20kg of calcium powder, and uniformly mixing to obtain auxiliary materials;
(4) and (2) carrying out solid-liquid separation on the modified pig manure prepared in the step (1) (a solid-liquid separator special for small-sized pig manure provided by Shandong fish platform greening environment-friendly energy-saving equipment manufacturing Co., Ltd.), drying the solid until the water content is 60% to prepare 3100kg of pig manure solid, then adding 950kg of auxiliary materials prepared in the step (3), uniformly mixing, granulating, sieving, metering and packaging to prepare cylindrical particles with the diameter of 1cm and the height of 0.5-0.8cm, namely the pig manure fermentation-free low-cost organic fertilizer.
The granulating is carried out by adopting a granulating machine produced by Shijiazhuang Shengrenli automatic equipment limited company, the temperature after granulating is kept at 55-65 ℃, and the water content of the granules is 25% after cooling.
Experimental example 2
The pig manure fermentation-free low-cost organic fertilizer prepared in the example 5 is used as a base fertilizer to be applied to root economic crops such as peanuts, sweet potatoes, potatoes and the like, and the application amount is 250kg per mu.
The fertilizer is applied to open-field potatoes in Yanzhuang village in peach gardens of fat cities, and the treatment 1 is that the conventional fertilizer application of farmers is used as a control group, namely, the basic fertilizer application of farmyard manure is 12000kg/hm215-15-15 kg/hm of compound fertilizer2(ii) a The treatment 2 is commercial organic fertilizer treatment, namely basal application of 5000kg/hm of commercial organic fertilizer215-15-15 kg/hm of compound fertilizer2(ii) a Treatment 3 is the pig manure fermentation-free low-cost organic fertilizer prepared in example 5, namely basal application pig manure fermentation-free low-cost organic fertilizer 5000kg/hm215-15-15 kg/hm of compound fertilizer2(ii) a The test results are shown in Table 5.
TABLE 5 Effect of products on Potato yield and economic traits
As can be seen from Table 5, the yield of potatoes treated by the commercial organic fertilizer is lower than that of applied farmyard manure, while the low-cost fermented pig manure organic fertilizer has the advantages that the yield is slightly increased compared with the treatment of applying 800Kg farmyard manure per mu under the condition of applying 250 Kg/mu; the fermentation-free organic fertilizer can effectively reduce the incidence rate of potato blocks, and remarkably improve the large and medium potato rate, thereby remarkably improving the commodity characters of potatoes.
Example 6
The preparation method for preparing the pig manure fermentation-free low-cost organic fertilizer according to the embodiment 4 is characterized in that the auxiliary materials comprise the following components:
75kg of urea, 20kg of diammonium phosphate, 55kg of potassium sulfate, 450kg of fermentation fungus residues, 150kg of soybean meal, 200kg of aminated lignite, 20kg of calcium powder and 30kg of bentonite, wherein the adding proportion of auxiliary materials is 30%; the preparation method is the same as that of example 1, but the blended powder is directly bagged without a granulation link. The produced organic fertilizer is mainly used as a base fertilizer before planting leaf vegetables such as spinach and lettuce. The application amount is 300kg per mu.
Claims (11)
1. A preparation method of a pig manure fermentation-free low-cost organic fertilizer is characterized by comprising the following steps:
(1) collecting pig manure, adding a modifier into the pig manure according to the addition amount of 0.3-0.8 kg/m, then adding a deodorant into the pig manure, and uniformly stirring to obtain modified pig manure;
the modifier comprises the following components in parts by weight:
1-5 parts of hydroxypropyl methacrylate, 95-99 parts of calcium hydroxide and 95-100 parts of monopotassium phosphate;
(2) selecting mushroom residues without sawdust after the cultivation of edible mushrooms, adjusting the water content to 55-65%, and performing aerobic fermentation for more than 14 days to prepare fermented mushroom residues;
(3) uniformly mixing 5-10 parts by weight of urea, 5-8 parts by weight of diammonium phosphate, 6-10 parts by weight of potassium sulfate, 30-40 parts by weight of fermentation fungus dregs prepared in the step (2), 10-20 parts by weight of soybean meal, 20-30 parts by weight of aminated lignite and 5-8 parts by weight of a plasticizer to prepare auxiliary materials;
(4) and (2) carrying out solid-liquid separation on the modified pig manure prepared in the step (1), drying the solid, adding the auxiliary material prepared in the step (3) according to the weight percentage of 20-35%, and uniformly mixing to prepare the fermentation-free low-cost organic fertilizer of pig manure.
2. The method according to claim 1, wherein the solid content in the pig manure in the step (1) is 5 to 8%.
3. The preparation method of claim 1, wherein the modifier in the step (1) is prepared into a modifier solution with a mass concentration of 5-15%, and then the modifier solution is added into pig manure.
4. The method according to claim 1, wherein the deodorant component in the step (1) is as follows, in parts by weight:
4500-5500 parts of ferrous sulfate, 4500-5500 parts of magnesium sulfate and 0.05-0.15 part of vanillin.
5. The method according to claim 1, wherein the deodorant is added in the step (1) in an amount of 0.3-0.8 kg/m, and the deodorant is prepared into a deodorant solution with a mass concentration of 5-15% and then added to the pig manure.
6. The preparation method of claim 1, wherein the modifier in the step (1) comprises the following components in parts by weight:
1 part of hydroxypropyl methacrylate, 99 parts of calcium hydroxide and 100 parts of potassium dihydrogen phosphate.
7. The method according to claim 1, wherein the plasticizer in the step (3) is calcium powder and/or bentonite.
8. The preparation method according to claim 1, wherein in the step (4), the solid-liquid separation is performed by pressure filtration, and the pore size of the filter screen is less than or equal to 0.5 mm.
9. The method according to claim 1, wherein in the step (4), the water content of the dried solid is 60 to 65%.
10. The method of claim 1, further comprising the steps of granulating, sieving, metering and packaging.
11. The preparation method according to claim 10, wherein the granulation is performed by using an extrusion granulation device with a temperature raising function, the temperature after granulation is kept at 55-65 ℃, and the water content of the granules is less than or equal to 28% after cooling.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067645A (en) * | 1991-06-13 | 1993-01-06 | 李鸿均 | Physico-chemical catalystic, fermentative deodorizing method for nightsoil in city |
| CN103224433A (en) * | 2013-05-16 | 2013-07-31 | 山东省农业科学院农业资源与环境研究所 | Soil fertility improver produced by utilizing waste bacterial residues |
| CN103288560A (en) * | 2013-04-03 | 2013-09-11 | 王楠 | Method for treatment of saline-alkali soil through combination of biological bacteriocin and medium trace elements |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267841B (en) * | 2011-06-22 | 2013-04-17 | 北京市农林科学院 | Slightly water-soluble fertilizer and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067645A (en) * | 1991-06-13 | 1993-01-06 | 李鸿均 | Physico-chemical catalystic, fermentative deodorizing method for nightsoil in city |
| CN103288560A (en) * | 2013-04-03 | 2013-09-11 | 王楠 | Method for treatment of saline-alkali soil through combination of biological bacteriocin and medium trace elements |
| CN103224433A (en) * | 2013-05-16 | 2013-07-31 | 山东省农业科学院农业资源与环境研究所 | Soil fertility improver produced by utilizing waste bacterial residues |
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