CN102701870B - Modified glutamic acid fertilizer synergist and production method and application thereof - Google Patents
Modified glutamic acid fertilizer synergist and production method and application thereof Download PDFInfo
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Abstract
The invention relates to a modified glutamic acid fertilizer synergist and a production method and an application thereof. The method comprises the following steps of: preparing a glutamic acid solution from sodium glutamate or glutamic acid; and adding trace elements including boron, zinc and manganese necessary for plants for producing the modified glutamic acid fertilizer synergist. Due to theadoption of the modified glutamic acid fertilizer synergist disclosed by the invention, the growth of crops is facilitated, root activity is increased, the absorbing capabilities of crops on phosphorus, potassium and medium and trace elements are increased, the crop yield and quality are improved remarkably, the fertilizer utilization ratio is increased, the ammonia volatilization loss is reduced, secondary pollution is avoided, and trace elements in soil can be replenished.
Description
[technical field]
The present invention relates to the chemical fertilizer potentiating technical field.More specifically, the present invention relates to a kind of modification L-glutamic acid fertilizer synergist, also relate to the production method of described modification L-glutamic acid fertilizer synergist, also relate to the purposes of described modification L-glutamic acid fertilizer synergist.
[background technology]
The chemical fertilizer utilization ratio of China is generally lower, the nitrogenous fertilizer average utilization is about 30%, phosphate fertilizer this season utilization ratio is about 25%, potassium utilization rate is about 50%, the fertilizer scientific worker has carried out large quantity research to the methods that improve utilization rate of fertilizer, obtained certain effect, but still had that production technique for fertilizer is complicated, cost is high, use is inconvenient, be difficult to the problem such as apply in field crop.In recent years, how under the condition that low cost drops into, the fertilizer industry of China is carried out technology upgrading and be transformed into study hotspot.In the past few decades, China is to fertilizer, and particularly the research of nitrogen fertilizer potentiating agent is more.These researchs focus mostly on the research of the chemicals such as urease inhibitor and nitrification inhibitor and using, and are less for crude substance and the research of modified natural material on fertilizer synergist.
L-glutamic acid is the highest amino acid of plant materials intensive amount, and simultaneously, L-glutamic acid is the synthetic precursor of multiple amino acids in the plant materials, plays vital effect in the growth and development process of plant.L-glutamic acid can form glutamine in plant materials, store nitrogen and can eliminate the toxic action that produces because of the ammonia excessive concentration.The carboxyl that contains in the L-glutamic acid, amino can promote the crop root growth to a certain extent, improve improving activity of root system; Improve the storage form of nitrogen in plant materials; Improve quality of agricultural product and output.
The present invention utilizes Sodium Glutamate or L-glutamic acid to prepare glutamic acid solution, and adds the plant essential trace element that generally lacks in China's soil, production modification L-glutamic acid fertilizer synergist.The inventor has carried out the lot of experiments research work on the basis of summing up prior art, has finally finished the present invention.
[summary of the invention]
[technical problem that will solve]
The purpose of this invention is to provide a kind of modification L-glutamic acid fertilizer synergist.
Another object of the present invention provides the preparation method of described modification L-glutamic acid fertilizer synergist.
Another object of the present invention provides the purposes of described modification L-glutamic acid fertilizer synergist.
[technical scheme]
The present invention is achieved through the following technical solutions.
The present invention relates to a kind of production method of modification L-glutamic acid fertilizer synergist.
The step of this production method is as follows:
A, compound concentration are 10-30% monosodium glutamate solution by weight, obtain a kind of monosodium glutamate solution I in 65 ~ 70 ℃ of lower heating of temperature.
The Sodium Glutamate that the present invention uses is a kind of sodium salt of Amino acid L-glutamic acid, is a kind of without the scentless crystal of color, is product sold in the market.
Preferably, described Sodium Glutamate purity is by weight more than 95%.
A preferred embodiment of the invention, described monosodium glutamate solution heating 30-60 minute.
B, the monosodium glutamate solution I that obtains take steps A are 5 ~ 50gH as mother liquor according to every liter of mother liquor
3BO
3In described mother liquor, add H with 10 ~ 30g EDTA
3BO
3And EDTA, fully obtain solution II after the dissolving.
Preferably, every liter of monosodium glutamate solution I mother liquor adds 12 ~ 40g H
3BO
3With 15 ~ 25g EDTA.
More preferably, every liter of monosodium glutamate solution I mother liquor adds 24 ~ 36g H
3BO
3With 18 ~ 22gEDTA.
The H that the present invention uses
3BO
3With EDTA all be product sold in the market.
C, be 5 ~ 15g ZnSO according to every liter of solution II
47H
2O and 5 ~ 15g MnSO
47H
2O adds ZnSO in described solution II
47H
2O and MnSO
47H
2O obtains a kind of modification L-glutamic acid fertilizer synergist behind the mixing.
Preferably, every liter of solution II is added 6 ~ 14g ZnSO
47H
2O and 6～14g MnSO
47H
2O.
More preferably, every liter of solution II is added 8 ~ 12g ZnSO
47H
2O and 8 ~ 12g MnSO
47H
2O.
The invention still further relates to a kind of production method of modification L-glutamic acid fertilizer synergist.
The step of this production method is as follows:
A, with concentration for by weight 5-15% inorganic alkali solution and L-glutamic acid according to weight ratio 1.8 ~ 7.6: 1 is mixed, and then obtains the glutaminate solution I in 65 ~ 70 ℃ of lower heating of temperature.
Described mineral alkali is selected from sodium hydroxide, potassium hydroxide, yellow soda ash, salt of wormwood, sodium bicarbonate or saleratus.
Preferably, described mineral alkali is selected from sodium hydroxide, potassium hydroxide, sodium bicarbonate or saleratus.
The weight ratio of described inorganic alkali solution and described L-glutamic acid preferably 2.2 ~ 7.0: 1.
More preferably, the weight ratio of described inorganic alkali solution and described L-glutamic acid is 2.8 ~ 6.0: 1.
A preferred embodiment of the invention, described inorganic alkali solution and L-glutamic acid mixture heating up 30-60 minute.
B, the glutaminate solution I that obtains take steps A are 5 ~ 50gH as mother liquor according to every liter of mother liquor
3BO
3In described mother liquor, add H with 10 ~ 30g EDTA
3BO
3And EDTA, fully obtain solution II after the dissolving.
Preferably, every liter of glutaminate solution I mother liquor adds 12 ~ 40g H
3BO
3With 15 ~ 25g EDTA.
More preferably, every liter of glutaminate solution I mother liquor adds 24 ~ 36g H
3BO
3With 18 ~ 22gEDTA.
The H that the present invention uses
3BO
3With EDTA all be product sold in the market.
C, be 5 ~ 15g ZnSO according to every liter of solution II
47H
2O and 5 ~ 15g MnSO
47H
2O adds ZnSO in described solution II
47H
2O and MnSO
47H
2O obtains a kind of modification L-glutamic acid fertilizer synergist behind the mixing.
Preferably, every liter of solution II is added 6 ~ 14g ZnSO
47H
2O and 6～14g MnSO
47H
2O.
More preferably, every liter of solution II is added 8 ~ 12g ZnSO
47H
2O and 8 ~ 12g MnSO
47H
2O.
According to another kind of preferred implementation of the present invention, according in the regional soil, micro-needs, in step B or step C, add in the described mother liquor calcic, magnesium, iron or copper in, trace element fertilizer.
In these, trace element fertilizer also all is product sold in the market.
The invention still further relates to the modification L-glutamic acid fertilizer synergist that adopts aforesaid method to obtain.
The invention still further relates to the purposes of described modification L-glutamic acid fertilizer synergist, its as fertilizer sources synergistic agent is applied to the production of urea, carbon ammonium, monoammonium phosphate, diammonium phosphate, Repone K, vitriolate of tartar, Chemical Mixed Fertilizer and secondary and micro-element fertilizers, and its addition is that the described fertilizer of per 1000 weight parts is 5 ~ 100 kilograms of described synergistic agent.Its addition means is not have hell and high water for those skilled in the art.
[beneficial effect]
The present invention is that L-glutamic acid is the highest amino acid of plant materials intensive amount, and simultaneously, L-glutamic acid is the synthetic precursor of multiple amino acids in the plant materials, plays vital effect in the growth and development process of plant.L-glutamic acid can form glutamine in plant materials, store nitrogen and can eliminate the toxic action that produces because of the ammonia excessive concentration.The carboxyl that contains in the L-glutamic acid, amino can promote the crop root growth to a certain extent, improve improving activity of root system, compare with the routine contrast, and the improving activity of root system that modification L-glutamic acid fertilizer synergist of the present invention can significantly improve Maize Seedling reaches more than 28%; Strengthen crop to the absorption of phosphorus, potassium and middle trace element; Improve the storage form of nitrogen in plant materials; Improve quality of agricultural product and output, compare with common urea, uses the urea of L-glutamic acid synergistic agent of the present invention can significantly increase grain number per spike and the 100-grain weight of corn, increase respectively 14.6% and 5.1%, output increase by 21.0%.Thereby, this synergistic agent product is by the promoter action of L-glutamic acid synergy liquid to plant growth, improve the storage form of nitrogen in the crop plant body, reduce ammonia to the harm of crop, compare with common urea, the ammonia loss by volatilization amount that glutamic acid synergist urea of the present invention can significantly reduce nitrogen reaches more than 52%.Synergistic agent product of the present invention promotes crop to the absorption of soil nutrient, obviously improves plant recovery of nutrient, and can replenish the trace element of soil.
[description of drawings]
Accompanying drawing 1 expression modification L-glutamic acid fertilizer synergist Production Flow Chart synoptic diagram of the present invention.
1-Sodium Glutamate (L-glutamic acid), 2-water (sodium hydroxide or potassium hydroxide solution), 3-heating steps, 4-glutamic acid solution, 5-zinc sulfate and manganous sulfate, 6-boric acid and EDTA, 7-modification L-glutamic acid fertilizer synergist.
[embodiment]
Can understand better the present invention by following embodiment and test example.
The modification L-glutamic acid fertilizer synergist of the present invention Production Flow Chart that represents referring to accompanying drawing 1 particularly.
Embodiment 1: the preparation of modification L-glutamic acid fertilizer synergist of the present invention
The implementation step of this embodiment is as follows:
A, compound concentration are 25% monosodium glutamate solution by weight, 70 ℃ of lower heating 45 minutes, obtain described monosodium glutamate solution I;
B, the monosodium glutamate solution I that obtains take steps A are 20g H as mother liquor according to every liter of mother liquor
3BO
3In described mother liquor, add H with 20g EDTA
3BO
3And EDTA, fully obtain solution II after the dissolving.
C, be 10g ZnSO according to every liter of solution II
47H
2O and 10g MnSO
47H
2O adds ZnSO in described solution II
47H
2O and MnSO
47H
2O obtains described modification L-glutamic acid fertilizer synergist behind the mixing.
Embodiment 2: the preparation of modification L-glutamic acid fertilizer synergist of the present invention
The implementation step of this embodiment is as follows:
A, compound concentration are 15% monosodium glutamate solution by weight, 65 ℃ of lower heating 60 minutes, obtain described monosodium glutamate solution I;
B, the glutamic acid solution I that obtains take steps A are 40g H as mother liquor according to every liter of mother liquor
3BO
3, and 10g EDTA adds H in described mother liquor
3BO
3And EDTA, fully obtain solution II after the dissolving;
C, be 5g ZnSO according to every liter of solution II
47H
2O and 5g MnSO
47H
2O adds ZnSO in described solution II
47H
2O and MnSO
47H
2O obtains modification L-glutamic acid fertilizer synergist behind the mixing.
Embodiment 3: the preparation of modification L-glutamic acid fertilizer synergist of the present invention
The implementation step of this embodiment is as follows:
A, compound concentration are 10% monosodium glutamate solution by weight, 68 ℃ of lower heating 30 minutes, obtain described monosodium glutamate solution I;
B, the monosodium glutamate solution I that obtains take steps A are 5g H as mother liquor according to every liter of mother liquor
3BO
3In described mother liquor, add H with 30g EDTA
3BO
3And EDTA, fully obtain solution II after the dissolving.
C, be 15g ZnSO according to every liter of solution II
47H
2O and 15g MnSO
47H
2O adds ZnSO in described solution II
47H
2O and MnSO
47H
2O obtains described modification L-glutamic acid fertilizer synergist behind the mixing.
Embodiment 4: the preparation of modification L-glutamic acid fertilizer synergist of the present invention
The implementation step of this embodiment is as follows:
A, compound concentration are 30% monosodium glutamate solution by weight, 70 ℃ of lower heating 60 minutes, obtain described monosodium glutamate solution I;
B, the glutamic acid solution I that obtains take steps A are 50g H as mother liquor according to every liter of mother liquor
3BO
3, and 20g EDTA adds H in described mother liquor
3BO
3And EDTA, fully obtain solution II after the dissolving;
C, be 12g ZnSO according to every liter of solution II
47H
2O and 12g MnSO
47H
2O adds ZnSO in described solution II
47H
2O and MnSO
47H
2O obtains modification L-glutamic acid fertilizer synergist behind the mixing.
Embodiment 5: the preparation of modification L-glutamic acid fertilizer synergist of the present invention
The implementation step of this embodiment is as follows:
A, compound concentration are 12% sodium hydroxide solution by weight, mix by weight 2.3: 1 ratio with L-glutamic acid, then 68 ℃ of lower heating 50 minutes, obtain monosodium glutamate solution I;
B, the glutamic acid solution I that obtains take steps A are 35g H as mother liquor according to every liter of mother liquor
3BO
3, and 20g EDTA adds H in described mother liquor
3BO
3And EDTA, fully obtain solution II after the dissolving;
C, be 10g ZnSO according to every liter of solution II
47H
2O and 10g MgSO
4In described solution II, add ZnSO
47H
2O and MnSO
47H
2O obtains a kind of modification L-glutamic acid fertilizer synergist behind the mixing.
Embodiment 6: the preparation of modification L-glutamic acid fertilizer synergist of the present invention
The implementation step of this embodiment is as follows:
A, be that 10% potassium hydroxide solution mixes by weight 4.8: 1 ratio with L-glutamic acid by weight with concentration, then 70 ℃ of lower heating 30 minutes, obtain the Potassium glutamate solution I;
B, the glutamic acid solution I that obtains take steps A are 20g H as mother liquor according to every liter of mother liquor
3BO
3, and 30g EDTA adds H in described mother liquor
3BO
3And EDTA,, fully obtain solution II after the dissolving;
C, be 15g CuSO according to every liter of solution II
45H
2O and 15g MnSO
4H
2O adds ZnSO in described solution II
47H
2O and MnSO
47H
2O obtains a kind of modification L-glutamic acid fertilizer synergist behind the mixing.
Embodiment 7: the preparation of modification L-glutamic acid fertilizer synergist of the present invention
The implementation step of this embodiment is as follows:
A, usefulness concentration are that 5% potassium hydroxide solution mixes by weight 7.6: 1 ratio with L-glutamic acid by weight, then 70 ℃ of lower heating 40 minutes, obtain the Potassium glutamate solution I;
B, the glutamic acid solution I that obtains take steps A are 50g H as mother liquor according to every liter of mother liquor
3BO
3, and 10g EDTA adds H in described mother liquor
3BO
3And EDTA, fully obtain solution II after the dissolving;
C, be 15g ZnSO according to every liter of solution II
4H
2O and 15g FeSO
47H
2O adds ZnSO in described solution II
47H
2O and MnSO
47H
2O obtains a kind of modification L-glutamic acid fertilizer synergist behind the mixing.
Embodiment 8: the preparation of modification L-glutamic acid fertilizer synergist of the present invention
The implementation step of this embodiment is as follows:
A, usefulness concentration are that 15% potassium hydroxide solution mixes by weight 1.8: 1 ratio with L-glutamic acid by weight, then 65 ℃ of lower heating 60 minutes, obtain the Potassium glutamate solution I;
B, the glutamic acid solution I that obtains take steps A are 5g H as mother liquor according to every liter of mother liquor
3BO
3, and 30g EDTA adds H in described mother liquor
3BO
3And EDTA, fully obtain solution II after the dissolving;
C, be 5g ZnSO according to every liter of solution II
4H
2O and 5g FeSO
47H
2O adds ZnSO in described solution II
47H
2O and MnSO
47H
2O obtains a kind of modification L-glutamic acid fertilizer synergist behind the mixing.
[fertilizer test]
Test example 1: modification L-glutamic acid fertilizer synergist of the present invention is on the impact of Maize Seedling improving activity of root system
Utilize sand culture test research modification L-glutamic acid fertilizer synergist on the impact of Seedling Root Systems In Maize vigor.Conventional contrast (CK) and 4 processing of modification L-glutamic acid fertilizer synergist of the present invention (G-1, G-2, G-3) are established in test, and G-1, G-2, G-3 are respectively the modification L-glutamic acid fertilizer synergists of embodiment 1,2,5 preparations, repeat 6 times.At first quartz sand is cleaned with clear water, put into the stainless steel pallet, keep certain humidity, corn kernel is put into dish, cover on it with wet cloth, under the condition of 25 ℃ of temperature, grow seedlings.When corn sprouts when growing to 3-5cm, corn is taken out put into the cultivation cup that fills with quartz sand, water concentration every day and be 0.2% modification L-glutamic acid fertilizer synergist 25mL, CK waters 25mL water.When corn grows to the 20cm left and right sides, take out root system, clean with clear water, adopt TTC method (reference: Zhang Xiong, measure vigor and the application [J] thereof of wheat root and pollen, Plant Physiology Communications, the 3rd phase of nineteen eighty-two with " TTC " method (TCC)) measure the improving activity of root system of corn.
Its test-results is listed in the table below in 1.
Table 1: Root Activity in Maize (mg/gh, TTC method)
| Process | Improving activity of root system |
| CK | 1.127 |
| G-1 | 1.512 |
| G-2 | 1.476 |
| G-3 | 1.448 |
Above-mentioned test-results shows, compares with the routine contrast, and modification L-glutamic acid fertilizer synergist of the present invention can significantly improve the improving activity of root system of Maize Seedling, and G-1, G-2, G-3 respectively contrast exceed 34.2%, 31.0% and 28.5%.
Test example 2: glutamic acid synergist urea is on the impact of corn yield and yield component
Test is established CK(and is not applied fertilizer), common urea (U) and utilize 3 processing of L-glutamic acid urea (GU) of L-glutamic acid fertilizer synergist production of the present invention, executing nitrogen level is that every post is executed purity nitrogen 1g(by the 30cm topsoil, be equivalent to 0.053gN/kg soil), totally 3 processing, repeat random alignment 8 times.Leaving and taking earth pillar upper strata 30cm is the clay fertilizer mixolimnion, applies calcium superphosphate (P as base manure for examination fertilizer
2O
516%) every post is executed 12.50g, Repone K (K
2O 60%) every post executes 3.33g, disposable applying when the dress post.Each corn earth pillar is all sowed 5 corn seeds, after emerging, and of field planting growing way the best, spacing in the rows is 40cm, line-spacing is 80cm.
Table 2: corn yield and constituent element
| Process | Output (g/ strain) | Grain number per spike | 100-grain weight (g) |
| CK | 26.22 | 143 | 18.34 |
| U | 46.32 | 246 | 18.83 |
| GU | 56.07 | 282 | 19.79 |
Above-mentioned test-results: compare with common urea, glutamic acid synergist urea can significantly increase grain number per spike and the 100-grain weight of corn, increases respectively 14.6% and 5.1%, and output increases by 21.0%.This shows that in the identical situation of nitrogen consumption, compare with the common urea processing, glutamic acid synergist urea of the present invention can significantly increase maize grain yield.
Test example 3: L-glutamic acid urea is on the impact of ammonia volatilization
Reference literature (people such as Ling Li, " research of Ammonia Volatilization from Calcareous Soil ", " soil erosion and soil conservation journal ", 1999,5 (6): 119 ~ 122), adopt " static absorption process " to measure the ammonia emission amount.
Concrete operations are as follows:
Take by weighing soil 500g(through 1mm mesh screen screening in dry ground), take by weighing glutamic acid synergist urea of the present invention according to 0.84gN/kg soil again, clay fertilizer is mixed, put into the plastic tank that specification is 15cm * 8.5cm * 17.5cm, regulating its water-content is 60% of maxmun field capacity, seal with the plastic seal membrana oralis, put into the cuvette that 10ml 2% boric acid is housed in the bucket, with methyl red-tetrabromo-mcresolsulfonphthalein mixture indicator as indicator, if 2 processing, be respectively common urea (U) and L-glutamic acid urea (GU), repeat 6 times.Place intelligent growth cabinet, cultured continuously under 25 ℃ of conditions when the 1st, 3,5,7,9,14,21 and 35 day of cultivating, is taken out absorption cell in the bucket, uses 0.02mol/L1/2H
2SO
4The standardized solution titration (reference: Liu Zengbing, Zhao Bingqiang, woods public security. humic acid urea ammonia volatilization characteristic and Study on influencing factors [J]. plant nutrition and fertilizer journal, the 1st phase in 2010), the pure nitrogen level that converts and volatilized at every turn according to the following equation:
m=c×(V-V
0)×0.014
In the formula:
M-boric acid absorbs the amount of ammonia-state nitrogen, g;
C-sulfuric acid (1/2H
2SO
4) concentration of standardized solution, mol/L;
The volume of the sulfuric acid standardized solution that V-sample drop regularly consumes, mL;
V
0The volume of the sulfuric acid standardized solution that consumes during-blank titration, mL;
0.014 the mmole quality of-nitrogen, g.
Obtain that the results are shown in Table 1.
Table 3: ammonia volatilization semi-invariant (under 25 ℃ of conditions) dynamic change (mg/pot)
| |
1 | 3 | 5 | 7 | 9 | 14 | 21 | 35 |
| U | 0.24 | 3.44 | 9.66 | 13.04 | 15.13 | 17.52 | 19.91 | 21.06 |
| GU | 0.14 | 2.09 | 4.14 | 5.66 | 6.27 | 7.85 | 8.91 | 10.02 |
Above-mentioned test-results shows: compare with common urea, glutamic acid synergist urea of the present invention can significantly reduce the ammonia loss by volatilization amount of nitrogen.In each time period of soil incubation, the ammonia volatilization semi-invariant of glutamic acid synergist urea all significantly is lower than common urea to be processed, and when being cultured to 35 days, the ammonia volatilization semi-invariant reduces by 52.4%.
This shows that modification L-glutamic acid liquid fertilizer material synergistic agent of the present invention has can promote the crop root growth, improve improving activity of root system, can significantly increase crop yield, reduces ammonia loss by volatilization, improves the characteristics such as utilization rate of fertilizer, environmental friendliness, additional soil trace element.Its manufacturing technology technique is simple, raw material sources are wide, easy handling, cost are low etc.
Claims (7)
1. the production method of a modification L-glutamic acid fertilizer synergist is characterized in that the step of the method is as follows:
A, compound concentration are 10-30% monosodium glutamate solution by weight, obtain a kind of monosodium glutamate solution I in 65～70 ℃ of lower heating of temperature; Described monosodium glutamate solution heating 30-60 minute;
B, the monosodium glutamate solution I that obtains take steps A are 5～50gH as mother liquor according to every liter of mother liquor
3BO
3In described mother liquor, add H with 10～30gEDTA
3BO
3And EDTA, fully obtain solution II after the dissolving;
C, be 5～15gZnSO according to every liter of solution II
47H
2O and 5～15gMnSO
47H
2O adds ZnSO in described solution II
47H
2O and MnSO
47H
2O obtains a kind of modification L-glutamic acid fertilizer synergist behind the mixing.
2. method according to claim 1 is characterized in that described Sodium Glutamate purity is by weight more than 95%.
3. the production method of a modification L-glutamic acid fertilizer synergist is characterized in that the step of the method is as follows:
A, with concentration for by weight 5-15% inorganic alkali solution and L-glutamic acid according to weight ratio 1.8～7.6: 1 is mixed, and then obtains the glutaminate solution I in 65～70 ℃ of lower heating of temperature; Described inorganic alkali solution and L-glutamic acid mixture heating up 30-60 minute;
B, the glutaminate solution I that obtains take steps A are 5～50gH as mother liquor according to every liter of mother liquor
3BO
3In described mother liquor, add H with 10～30gEDTA
3BO
3And EDTA, fully obtain solution II after the dissolving;
C, be 5～15gZnSO according to every liter of solution II
47H
2O and 5～15gMnSO
47H
2O adds ZnSO in described solution II
47H
2O and MnSO
47H
2O obtains a kind of modification L-glutamic acid fertilizer synergist behind the mixing.
4. method according to claim 3 is characterized in that described mineral alkali is selected from sodium hydroxide, potassium hydroxide, yellow soda ash, salt of wormwood, sodium bicarbonate or saleratus.
5. method according to claim 3 is characterized in that described mineral alkali is selected from sodium hydroxide, potassium hydroxide, sodium bicarbonate or saleratus.
6. according to claim 1 or 3 described methods, it is characterized in that according to regional soil trace element needs, in step B or step C, add in the described mother liquor calcic, magnesium, iron or copper in, trace element fertilizer.
7. the modification L-glutamic acid fertilizer synergist that the described method of arbitrary claim obtains according to claim 1-6.
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| CN103274855A (en) * | 2013-06-17 | 2013-09-04 | 中国农业科学院农业资源与农业区划研究所 | Glutamic acid synergistic high-tower compound fertilizer and production method thereof |
| CN103274853A (en) * | 2013-06-17 | 2013-09-04 | 中国农业科学院农业资源与农业区划研究所 | Glutamic acid synergistic ammonium bicarbonate fertilizer and production method thereof |
| CN103274856A (en) * | 2013-06-17 | 2013-09-04 | 中国农业科学院农业资源与农业区划研究所 | Glutamic acid synergistic ammonium phosphate fertilizer and preparation method thereof |
| CN103626591A (en) * | 2013-12-11 | 2014-03-12 | 石文杰 | Water-retaining and soil-moisture-retaining fertilizer |
| CA3046467A1 (en) * | 2016-10-25 | 2018-05-03 | Waterscience, Inc. | Method and composition for retaining nutrients in soil at planting sites |
| CN111875443A (en) * | 2020-08-12 | 2020-11-03 | 陈贝 | Biochar compound fertilizer and preparation method thereof |
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| CN102701870A (en) | 2012-10-03 |
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