CN103396207B - Fertilizer with saving synergistic formula - Google Patents
Fertilizer with saving synergistic formula Download PDFInfo
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- CN103396207B CN103396207B CN201310273816.7A CN201310273816A CN103396207B CN 103396207 B CN103396207 B CN 103396207B CN 201310273816 A CN201310273816 A CN 201310273816A CN 103396207 B CN103396207 B CN 103396207B
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Abstract
The invention belongs to a fertilizer field, concretely a fertilizer with a saving synergistic formula. The fertilizer with the saving synergistic formula is prepared by the following raw materials by weight: 402-587 parts of polyaspartic acid coated urea, 136-273 parts of monoammonium phosphate, 100-200 parts of potassium chloride, and 1-3 parts of microbial flora pulvis; wherein the a weight ratio of urea with big granules to polyaspartic acid of the polyaspartic acid coated urea is 1000:3-5. A fertilizer product can raises a fertilizer utilization rate, saves raw materials, prolongs a fertilizer release period, and reduces artificial investment and agricultural production cost. Simultaneously, the fertilizer product can raises crop output, maintains quality safety of agricultural products, reduces fertilizer pollution on environment, protects ecological environment, accelerates development of modern agriculture, and increases peasant income.
Description
Technical field
The invention belongs to fertilizer field, be specifically related to the fertile synergistic formula fertilizer of a kind of joint.
Background technology
Fertilizer is the important substance basis of equipment modern agricultural development, and the research and development of the fertile concentrated fertilizer product of novel joint have been put into country " 12 " development program, are the high-technology fields that state key is supported.Assembly research and development high efficiency, long-actingization, customizations, innoxious all kinds of joints are fertile, to meet domestic and international market demand be very necessary to enhanced fertilizer product innovation.
Summary of the invention
Fertilizer product of the present invention can improve utilization rate of fertilizer, conservation, prolongation fertile phase, reduces fertilizer application frequency, reduce artificial input and agriculture production cost.Meanwhile, can also improve crop yield, keep agricultural product quality and safety, reduce chemical fertilizer to the pollution of environment, preserve the ecological environment, Speeding The Development of Modern Agriculture, increases farmers' income.
The present invention is achieved through the following technical solutions:
The fertile synergistic formula fertilizer of a kind of joint, is made up of the raw material of following weight part: poly aspartic acid coated carbamide 402 ~ 587 parts, monoammonium phosphate 136 ~ 273 parts, 100 ~ 200 parts, Repone K, 1 ~ 3 part, microbial bacteria pulvis; Wherein, in poly aspartic acid coated carbamide, the weight ratio of granular urea and poly aspartic acid is 1000:3 ~ 5.
According to the fertile synergistic formula fertilizer of above-mentioned joint, in composite fertilizer, the weight ratio of N:P2O5:K2O is 20 ~ 30:6 ~ 12:6 ~ 12.
According to the fertile synergistic formula fertilizer of above-mentioned joint, preferred proportion granular urea in poly aspartic acid coated carbamide: poly aspartic acid is 1000:4.
According to the fertile synergistic formula fertilizer of above-mentioned joint, in microbial bacteria pulvis living bacteria count be not less than 30,000,000,000/gram, preferably 300 ~ 40,000,000,000/gram.
According to the fertile synergistic formula fertilizer of above-mentioned joint, the biological bacteria in described microbial bacteria pulvis comprises Brasil diazotrophic spirillum, Bacillus licheniformis and EM bacterium.
According to the fertile synergistic formula fertilizer of above-mentioned joint, described microbial bacteria pulvis comprises the biological bacteria of following weight percent: Brasil diazotrophic spirillum 24 ~ 32%, Bacillus licheniformis 15 ~ 25% and EM bacterium 35 ~ 50%.
According to the fertile synergistic formula fertilizer of above-mentioned joint, described microbial bacteria pulvis is Henan Prov. Inst.'s transformation of scientific and technical result product, registration card number: 9412008Y1431.
According to the fertile synergistic formula fertilizer of above-mentioned joint, preparation method comprises the following steps:
(1) raw material is equipped with in proportion;
(2) poly aspartic acid coated carbamide: granular urea is poured in coating machine, poly aspartic acid is evenly sprayed at granular urea surface, and stir after 5 ~ 10 minutes in coating machine cylinder, discharging is packed, place 2 week more than, poly aspartic acid is penetrated into inside granular urea completely;
(3) poly aspartic acid coated carbamide, monoammonium phosphate, Repone K are added stirrer feed bin, evenly spray microbial bacteria pulvis again, again carry out blending coating, drum agitation 5 ~ 10 minutes, microbial bacteria pulvis is evenly wrapped on fertiliser granulates, then discharging packaging.
Positive beneficial effect of the present invention:
1, fertilizer product of the present invention increases substantially utilization rate of fertilizer, conservation resource, extends the fertile phase, reduces fertilizer application frequency, reduces artificial input and agriculture production cost.Meanwhile, also for raising crop yield, keep agricultural product quality and safety, reduce chemical fertilizer to the pollution of environment, preserve the ecological environment, Speeding The Development of Modern Agriculture, increases farmers' income, and builds up well-off society and has irreplaceable value.
2, the effect of poly aspartic acid (PAPS) parcel (coating) granular urea is:
1. biological degradability: poly aspartic acid is a kind of polymeric amino acid often having carboxylic acid side switch, the biodegradation rate of its poly aspartic acid hydrogel in active earth is reach 76% in 28 days.2. toxicity: utilize Kunming mouse acute toxicity test, Ames experimental result shows: poly aspartic acid is nontoxicity both, also without mutagenesis.This provides foundation for using poly aspartic acid safely.3. its mechanism of action of poly aspartic acid, the poly-each monomer of asparagus fern has the carboxyl of an opening, and this carboxyl is donor in coordination chemistry i.e. meshing position, and chelating nominal price example is delivered to the newborn position of crop, thus plays the effect of nutrient delivery instrument.4. crop yield is increased: according to field test, wheat increase yield 18-21%, corn yield increasing 10-14%, vegetable increase production 12.9-18%.5. improve crop quality, poly aspartic acid, by promoting the absorption of medium trace element, reaches the coordination supply of crop nutrition content, improves crop quality.Test factually, wheat quality improves obviously, its thousand seed weight, wet gluten, unit weight, crude protein equivalence improve respectively 0.4g, 6.8%, 17g/L, 2.22%.6. promote that main root, side root, root hair grow, improve the receptivity to nutrient, strengthen the resisting of crop, drought resisting, the anti-adversity such as cold-resistant, disease-resistant.7. poly aspartic acid can reduce the detrimentally affect that excessive fertilization causes environment, can improve utilization rate of fertilizer, can improve soil quality again.
3, the effect adding microbial germ powder is:
1. survive in Gao Yan composite fertilizer, probiotics biont quantity is many and stability is strong.2. fixed nitrogen, activation phosphorus potassium: the organic and inorganic nutrient of activating soil, improves fertilizer efficiency rate, promotes crop circulation, Prolonged absorption utilizes.3. effectively soil-borne disease is suppressed: improve soil microorganisms flora, suppress soil surface characters breeding, overcome continuous cropping obstacle, reduce Pesticide use amount.4. improve Soil structure, increase soil fertility: can soil microenvironment be improved, eliminate soil compaction, neutralizing acid basicity, reduction heavy metal-polluted soil and saline and alkaline murder by poisoning.5. oil recovery enhancement, increasing both production and income: beneficial microorganism is in breeding metabolic process, can plant hormone and the amino acid isoreactivity material such as secretory cell mitogen, indolylacetic acid, VITAMIN, this acetic acid, Plant hormones regulators,gibberellins, powerful promote extraneous root, take root, strong root, capillary double above with quantity, strengthen water suction, fertilizer sucting ability.
table 1 saves fertile synergistic formula fertilizer corn effect questionnaire
。
table 2 saves fertile synergistic formula fertilizer wheat effect questionnaire
。
Embodiment
Below in conjunction with specific embodiment, the present invention is described in more detail, but the invention is not restricted to these embodiments.
embodiment 1
The weight ratio that the present embodiment saves N:P2O5:K2O in fertile synergistic formula fertilizer is 28.5:12:10; Described formula fertilizer is made up of the raw material of following weight part: poly aspartic acid coated carbamide (N46%) 558 parts, monoammonium phosphate (N11%-P2O544%) 273 parts, 167 parts, Repone K (K2O60%), 2 parts, microbial bacteria pulvis.Wherein, in poly aspartic acid coated carbamide, the weight ratio of granular urea and poly aspartic acid is 1000:4; Biological bacteria mainly comprises Brasil diazotrophic spirillum, Bacillus licheniformis and EM bacterium, is Henan Prov. Inst.'s transformation of scientific and technical result product, registration card number: 9412008Y1431.
Preparation method comprises the following steps:
(1) raw material is equipped with in proportion;
(2) poly aspartic acid coated carbamide: granular urea is poured in coating machine, poly aspartic acid is evenly sprayed at granular urea surface, and stir after 5 ~ 10 minutes in coating machine cylinder, discharging is packed, place 2 week more than, poly aspartic acid is penetrated into inside granular urea completely;
(3) poly aspartic acid coated carbamide, monoammonium phosphate, Repone K are added stirrer feed bin, evenly spray microbial bacteria pulvis again, again carry out blending coating, drum agitation 5 ~ 10 minutes, microbial bacteria pulvis is evenly wrapped on fertiliser granulates, then discharging packaging.
Embodiment 1 field fertilizer efficiency (corn)
1, touchstone: NY/T 798-2004; Test site: build in Shandong, Lu Tun village of Lankao County area just outside a city gate township of Henan Province respectively, abutment chief of township wins village grandson station, Li Xi village, Liu Biao, Zhao Ying town of Zhao Yingzhencheng village village Bu Qing conjunction, Zhang Changju, Meng Zhai township of Fan Zhai village, Guyang town Sun Xi village Sun Li ripple, Han Ying village of Meng Zhai township will strive in red, east, Yi Feng township two in stockaded village Zhu Wei is red, land, red temple Zhen Bei village is green for a long time, journey east in Wang great Piao village, shelf town is auspicious farmland covered by contract; For studying thing corn variety: first jade 335.
2, test method
5 process are established in test, take the group arrangement of random district, repeat for three times.Plot area 50 square metres, all should establish the ridge between each community, between district's group, prevents channeling water from altering fertilizer, experimental field establishes 1m to protect row around.Test each process except by except the topdressing of protocols call, other control measures are identical.Fertilising: disposablely to apply at corn typhon mouth phase trench digging.
Process 1: blank (not applying fertilizer);
Process 2: N P and K 28-12-10 bulk blended fertilizer, every mu of 50kg;
Process 3: N P and K 28-12-10 bulk blended fertilizer+microbial bacteria, product living bacteria count is 0.20 hundred million/gram, every mu of 50kg;
Process 4: N P and K 28-12-10 bulk blended fertilizer+poly aspartic acid, product poly aspartic acid every mu of consumption reaches 10 ~ 12 grams, every mu of 50kg;
Process 5: the present embodiment saves fertile synergistic formula fertilizer, every mu of 40kg.
table 3 corn fertilizer efficiency experiment basic condition cartogram
。
3, experimental result and analysis
table 4 is tested species test and is surveyed product table
。
3.1 different treatment are on the impact of corn biological character
Corn biological character is the basis of corn yield, and applying fertilizer is different, very large on the impact of corn biological character, thus affects the output of corn.As can be seen from Table 4, when rate of fertilizer is constant, along with interpolation microbial bacteria or poly aspartic acid, corn ear length, row grain number, grain number per spike thousand seed weight are also in increase, when adding microbial bacteria and poly aspartic acid simultaneously, Fertilizer application amount reduces 20%, and these biological characters reach maximum value.
3.2 different treatment are on the impact of corn yield
As can be seen from Table 2, when rate of fertilizer is constant, along with interpolation microbial bacteria or poly aspartic acid, corn yield is also also increasing, single interpolation microbial bacteria or poly aspartic acid, the amplitude that output increases is suitable, when adding microbial bacteria and poly aspartic acid simultaneously, Fertilizer application amount reduces 20%, corn per mu yield reaches maximum value 630.4kg, process 5 process 2 relatively, mu volume increase 66.2kg, stimulation ratio 12.16%, utilization rate of fertilizer improves 44.80%.
4, conclusion
When rate of fertilizer application is consistent, along with interpolation microbial bacteria or poly aspartic acid, corn yield increases, and microbial bacteria and poly aspartic acid can increase corn yield.Add microbial bacteria and poly aspartic acid, Fertilizer application amount reduces 20%, and corn yield reaches maximum value simultaneously.Visible, add microbial bacteria and poly aspartic acid, can not only increase production, and reduce Fertilizer application amount minimizing environmental pollution, improve utilization rate of fertilizer, increase yield.
embodiment 2
The weight ratio that the present embodiment saves N:P2O5:K2O in fertile synergistic formula fertilizer is 21.5:12:8; Described formula fertilizer is made up of the raw material of following weight part: poly aspartic acid coated carbamide (N46%) 402 parts, monoammonium phosphate (N11%-P2O544%) 273 parts, 133 parts, Repone K (K2O60%), 2 parts, microbial bacteria pulvis.Wherein, in poly aspartic acid coated carbamide, the weight ratio of granular urea and poly aspartic acid is 1000:4, in microbial bacteria pulvis living bacteria count be 300 ~ 40,000,000,000/gram, comprise following weight percent biological bacteria: Brasil diazotrophic spirillum 32%, Bacillus licheniformis 20% and EM bacterium 48%.
Preparation method is identical with embodiment 1.
Embodiment 2 field fertilizer efficiency (wheat)
1, touchstone: NY/T 798-2004; Test site: respectively in Wang Zhuan village of Lankao County area just outside a city gate township of Henan Province Duan Wenxing, the grand celebration in the Meng of Zhang village village of abutment township, in Zhao Ying Zhen Er village generation, is strong, poplar state of Zhao Ying Zhen Yi village is suitable, woods is congratulated somebody on a happy occasion in Fan Zhai village, Guyang town model man of virtue and ability hall, He Zhuan village, Guyang town, High-Field village of area just outside a city gate township Zhang Zhiqiang, Yi Feng township garden spot lijin are loyal, in the farmland covered by contract of red temple town memorial archway village Guo Singapore dollar; For studying thing wheat breed: Henan wheat 34.
2, test method
5 process are established in test, take the group arrangement of random district, repeat for three times.Plot area 40 square metres, all should establish the ridge between each community, between district's group, prevents channeling water from altering fertilizer, experimental field establishes 1m to protect row around.Test each process except by except the topdressing of protocols call, other control measures are identical.Fertilising: for the whole bottom application of examination fertilizer, impose urea 15kg wheat period of seedling establishment every mu.
Process 1: blank (not applying fertilizer);
Process 2: N P and K 21.5-12-8 bulk blended fertilizer, every mu of 50kg;
Process 3: N P and K 21.5-12-8 bulk blended fertilizer+microbial bacteria, product living bacteria count is 0.20 hundred million/gram, every mu of 50kg;
Process 4: N P and K 21.5-12-8 bulk blended fertilizer+poly aspartic acid, product poly aspartic acid every mu of consumption reaches 10 ~ 12 grams, every mu of 50kg;
Process 5: the present embodiment saves fertile synergistic formula fertilizer, every mu of 40kg.
table 5 wheat fertilizer efficiency experiment basic condition cartogram in 2009
。
3, experimental result and analysis
table 6 is tested species test and is surveyed product table
。
3.1 different treatment are on the impact of Biological Characteristics of Wheat
Biological Characteristics of Wheat is the basis of wheat yield, and applying fertilizer is different, very large on Biological Characteristics of Wheat impact, thus affects the output of wheat.As can be seen from Table 6, when rate of fertilizer is constant, along with interpolation microbial bacteria or poly aspartic acid, Plant Height in Wheat, stem are thick, spike length, grain number per spike, mu spike number, thousand seed weight is also in increase, when adding microbial bacteria and poly aspartic acid simultaneously, Fertilizer application amount reduces 20%, and these biological characters reach maximum value.
3.2 different treatment are on the impact of wheat yield
As can be seen from Table 2, when rate of fertilizer is constant, along with interpolation microbial bacteria or poly aspartic acid, wheat yield is also also increasing, single interpolation microbial bacteria or poly aspartic acid, the amplitude that output increases is suitable, when adding microbial bacteria and poly aspartic acid simultaneously, Fertilizer application amount reduces 20%, wheat yield reaches maximum value 490.3kg, process 5 process 2 relatively, mu volume increase 82.7kg, stimulation ratio 20.29%, utilization rate of fertilizer improves 50.58%.
4, conclusion
When rate of fertilizer application is consistent, along with interpolation microbial bacteria or poly aspartic acid, wheat yield increases, and microbial bacteria and poly aspartic acid can increase wheat yield.Add microbial bacteria and poly aspartic acid, Fertilizer application amount reduces 20%, and wheat yield reaches maximum value simultaneously.Add microbial bacteria and poly aspartic acid, can not only increase production, and reduce Fertilizer application amount minimizing environmental pollution, improve utilization rate of fertilizer, increase yield.
embodiment 3
The present embodiment saves fertile synergistic formula fertilizer and is made up of the raw material of following weight part: poly aspartic acid coated carbamide 402 parts, monoammonium phosphate 136 parts, 100 parts, Repone K, 1 part, microbial bacteria pulvis, wherein, in poly aspartic acid coated carbamide, the weight ratio of granular urea and poly aspartic acid is 1000:3, in microbial bacteria pulvis living bacteria count be 300 ~ 40,000,000,000/gram, comprise following weight percent biological bacteria: Brasil diazotrophic spirillum 24%, Bacillus licheniformis 15% and EM bacterium 45%, surplus is impurity.
embodiment 4
The present embodiment saves fertile synergistic formula fertilizer and is made up of the raw material of following weight part: poly aspartic acid coated carbamide 587 parts, monoammonium phosphate 273 parts, 200 parts, Repone K, 3 parts, microbial bacteria pulvis, wherein, in poly aspartic acid coated carbamide, the weight ratio of granular urea and poly aspartic acid is 1000:5, in microbial bacteria pulvis living bacteria count be 300 ~ 40,000,000,000/gram, comprise following weight percent biological bacteria: Brasil diazotrophic spirillum 32%, Bacillus licheniformis 25% and EM bacterium 43%.
Preparation method is identical with embodiment 1.
embodiment 5
The present embodiment saves fertile synergistic formula fertilizer and is made up of the raw material of following weight part: poly aspartic acid coated carbamide 500 parts, monoammonium phosphate 210 parts, 150 parts, Repone K, 2 parts, microbial bacteria pulvis, wherein, in poly aspartic acid coated carbamide, the weight ratio of granular urea and poly aspartic acid is 1000:4, in microbial bacteria pulvis living bacteria count be 300 ~ 40,000,000,000/gram, comprise following weight percent biological bacteria: Brasil diazotrophic spirillum 28%, Bacillus licheniformis 20% and EM bacterium 50%, surplus is impurity.
Preparation method is identical with embodiment 1.
embodiment 6
The present embodiment saves fertile synergistic formula fertilizer and is made up of the raw material of following weight part: poly aspartic acid coated carbamide 587 parts, monoammonium phosphate 136 parts, 200 parts, Repone K, 2 parts, microbial bacteria pulvis, wherein, in poly aspartic acid coated carbamide, the weight ratio of granular urea and poly aspartic acid is 1000:3, and microbial bacteria pulvis is Henan Prov. Inst.'s transformation of scientific and technical result product, registration card number: 9412008Y1431.
Preparation method is identical with embodiment 1.
embodiment 7
The present embodiment saves fertile synergistic formula fertilizer and is made up of the raw material of following weight part: poly aspartic acid coated carbamide 402 parts, monoammonium phosphate 273 parts, 100 parts, Repone K, 2 parts, microbial bacteria pulvis, wherein, in poly aspartic acid coated carbamide, the weight ratio of granular urea and poly aspartic acid is 1000:5, and microbial bacteria pulvis is Henan Prov. Inst.'s transformation of scientific and technical result product, registration card number: 9412008Y1431.
Preparation method is identical with embodiment 1.
The present invention is not limited to above-mentioned embodiment, and those skilled in the art also can make multiple change accordingly, but to be anyly equal to the present invention or similar change all should be encompassed in the scope of the claims in the present invention.
Claims (7)
1. save a fertile synergistic formula fertilizer, it is characterized in that, be made up of the raw material of following weight part: poly aspartic acid coated carbamide 402 ~ 587 parts, monoammonium phosphate 136 ~ 273 parts, 100 ~ 200 parts, Repone K, 1 ~ 3 part, microbial bacteria pulvis; Wherein, in poly aspartic acid coated carbamide, the weight ratio of granular urea and poly aspartic acid is 1000:3 ~ 5, and the biological bacteria in described microbial bacteria pulvis comprises Brasil diazotrophic spirillum, Bacillus licheniformis and EM bacterium; The preparation method of the fertile synergistic formula fertilizer of described joint comprises the following steps:
(1) raw material is equipped with in proportion;
(2) poly aspartic acid coated carbamide: granular urea is poured in coating machine, poly aspartic acid is evenly sprayed at granular urea surface, stir in coating machine cylinder after 5 ~ 10 minutes, discharging is packed, place 2 week more than, poly aspartic acid is penetrated into inside granular urea completely;
(3) poly aspartic acid coated carbamide, monoammonium phosphate, Repone K are added stirrer feed bin, evenly spray microbial bacteria pulvis again, again carry out blending coating, drum agitation 5 ~ 10 minutes, microbial bacteria pulvis is evenly wrapped on fertiliser granulates, then discharging packaging.
2. save fertile synergistic formula fertilizer according to claim 1, it is characterized in that: N:P in composite fertilizer
2o
5: K
2the weight ratio of O is 20 ~ 30:6 ~ 12:6 ~ 12.
3. save fertile synergistic formula fertilizer according to claim 1, it is characterized in that: in poly aspartic acid coated carbamide, granular urea and poly aspartic acid weight ratio are 1000:4.
4. save fertile synergistic formula fertilizer according to claim 1, it is characterized in that: in microbial bacteria pulvis living bacteria count be not less than 30,000,000,000/gram.
5. save fertile synergistic formula fertilizer according to claim 4, it is characterized in that: in microbial bacteria pulvis living bacteria count be 300 ~ 40,000,000,000/gram.
6. save fertile synergistic formula fertilizer according to claim 1, it is characterized in that: described microbial bacteria pulvis comprises the biological bacteria of following weight percent: Brasil diazotrophic spirillum 24 ~ 32%, Bacillus licheniformis 15 ~ 25% and EM bacterium 35 ~ 50%.
7. save fertile synergistic formula fertilizer according to claim 1, it is characterized in that: described microbial bacteria pulvis is Henan Prov. Inst.'s transformation of scientific and technical result product, registration card number: 9412008Y1431.
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| CN104261922A (en) * | 2014-10-22 | 2015-01-07 | 中山市巴斯德农业科技有限公司 | Making method for organic fertilizer for promoting nutrient function of crops |
| CN106278664A (en) * | 2016-09-05 | 2017-01-04 | 刘卫东 | A kind of environmentally friendly functional controlled release bulk blended fertilizer of degradable lignin and trace element peplos and preparation method thereof |
| CN112374943B (en) * | 2020-12-01 | 2022-06-07 | 甘肃省农业科学院植物保护研究所 | Soil activator and preparation method thereof |
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| CN101289356A (en) * | 2008-06-16 | 2008-10-22 | 李绍通 | Polypeptide coating agent and uses thereof |
| CN102417427A (en) * | 2011-09-08 | 2012-04-18 | 河南心连心化肥有限公司 | Polyaspartic acid slow release compound fertilizer and production method thereof |
| CN103044146A (en) * | 2013-01-12 | 2013-04-17 | 重庆润绿生物有机肥有限公司 | Complex control type long-acting controlled-release organic and inorganic biological fertilizer |
| CN103145508A (en) * | 2013-04-08 | 2013-06-12 | 石家庄中农兴泰生物科技有限公司 | Aspartate urea and production method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX2008002264A (en) * | 2005-08-18 | 2008-11-19 | Regal Chemical Company | Slow-release fertilizer and method of making and using same. |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1214667A (en) * | 1996-02-02 | 1999-04-21 | Basf公司 | Granulate mixtures consisting of coated and non-coated fertiliser granulates |
| CN101289356A (en) * | 2008-06-16 | 2008-10-22 | 李绍通 | Polypeptide coating agent and uses thereof |
| CN102417427A (en) * | 2011-09-08 | 2012-04-18 | 河南心连心化肥有限公司 | Polyaspartic acid slow release compound fertilizer and production method thereof |
| CN103044146A (en) * | 2013-01-12 | 2013-04-17 | 重庆润绿生物有机肥有限公司 | Complex control type long-acting controlled-release organic and inorganic biological fertilizer |
| CN103145508A (en) * | 2013-04-08 | 2013-06-12 | 石家庄中农兴泰生物科技有限公司 | Aspartate urea and production method and application thereof |
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