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Controlled availability special BB fertilizer for cotton and preparation thereof

A cotton, long-acting technology, applied in the field of long-acting special fertilizer for cotton, can solve the problems of complex coating process, expensive production materials and high product cost, and achieve the maintenance of soil structure, smooth and lasting supply and release, and long fertilizer effect period. Effect

Inactive Publication Date: 2013-04-10
SHIKEFENG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are not many varieties of long-acting special fertilizers for cotton. The current slow-release fertilizers mostly use chemical slow-release formulations, polymer coatings, synthetic slow-release fertilizers, and matrix compound and adhesive slow-release fertilizers, but most of them have production The material is expensive, the product cost is high, and the coating process is complicated, so it is difficult to form an ideal "S"-shaped nutrient release curve

Method used

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  • Controlled availability special BB fertilizer for cotton and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh basic fertilizers urea, monoammonium phosphate, superphosphate, potassium sulfate and a small amount of trace element fertilizers, nitrogen, phosphorus, potassium fertilizers and trace elements are based on effective content, and the weight fraction is 25 parts N, 12 parts P 2 o 5 , 3 copies of K 2 O, 0.57 parts of trace element iron, 0.44 parts of zinc, and 0.3 parts of manganese are blended in a proportional relationship. The pure nutrients of the above fertilizers account for not less than 40% of the total weight percentage of BB fertilizers. In addition, nitrogen inhibitor nitrogen-pyridine is added to account for the weight of BB fertilizers. 1.2% of the total weight, oxalic acid weight accounted for 4% of the total weight of BB fertilizer.

[0023] Mix the nitrogen, phosphorus, potassium fertilizer, trace elements and bentonite in the BB fertilizer in the above proportions and crush them through a 40-mesh sieve. Mix the sieved fertilizer with nitrogen inhib...

Embodiment 2

[0027] Nitrogen, phosphorus, and potassium fertilizers are based on effective content and blended by weight fraction, that is, N:P 2 o 5 : K 2 O=23:12:5, the content of trace elements is 2.4%, and the total nutrient content accounts for no less than 42% of the total weight of the BB fertilizer. Above-mentioned nitrogen, phosphorus, potassium fertilizer and trace element are respectively: take by weighing 40 kilograms of urea (N 46%), monoammonium phosphate (N 12%, P 2 o 5 59%) 8 kg, heavy superphosphate (P 2 o 5 46%) 11.7 kg, potassium sulfate (K 2 (2050%) 8.4 kilograms, in addition take by weighing 2 kilograms of zinc sulfate heptahydrate, 1 kilogram of manganese sulfate monohydrate, 3 kilograms of ferrous sulfate heptahydrate, then mix with 15.2 kilograms of fly ash, sieve after pulverizing, then add and 2.4 kg of dicyandiamide (DCD) and 4 kg of citric acid monohydrate are stirred evenly and added to the drum granulator, and the machine is started to rotate continuou...

Embodiment 3

[0030] Prepare 100kgBB fertilizer: take by weighing 47.9 kilograms of urea (N 46%), monoammonium phosphate (N 12%, P2 o 5 59%) 18.8 kg, potassium sulfate (K 2 O 50%) 7.9 kg, formulated as effective content, N:P by weight fraction 2 o 5 : K 2 O=25:14:5, in addition, weigh 3.0 kg of zinc sulfate heptahydrate, 2.0 kg of manganese sulfate monohydrate, and 4.0 kg of ferrous sulfate heptahydrate. Weigh, pulverize, sieve, add 12.0 kg of bentonite and 5.0 kg of long-acting additive dicyandiamide (DCD), 2.5 kg of citric acid monohydrate and stir evenly, then add to the drum granulator, start the machine to rotate continuously, In the process of adding polyacryl alcohol to prepare a concentration of 2% aqueous solution, the amount of polyacrylamide aqueous solution sprayed is equivalent to about 8% of the total weight of BB fertilizer, so that the outer surface of the particles is evenly attached to the high molecular polymer solution.

[0031] Weigh the above-mentioned cotton long...

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Abstract

The invention relates to a controlled availability special fertilizer for cotton, in particular to a controlled availability special BB fertilizer for the cotton which aims at the characteristics of Xinjiang cotton culture and preparation thereof. On the basis of nitrogen, phosphorous and potash fertilizers, a nitrogen inhibitor, a phosphorous activating agent, a micronutrient fertilizer and a high molecular polymer are added into the fertilizer; and then the fertilizer is granulated to obtain the controlled availability special BB fertilizer for the cotton. The controlled availability special BB fertilizer can reduce the speed of nitrogen fertilizer release and the form transformation speed of the nitrogen and also can activate the activity of the phosphorus, so that longevity is longer and utilization rate is higher.

Description

technical field [0001] The invention relates to a special long-acting fertilizer for cotton, in particular to a special long-acting BB fertilizer for cotton aiming at the characteristics of cotton cultivation in Xinjiang and its preparation. Background technique [0002] In the existing conventional fertilization technology, quick-acting fertilizers such as urea and ammonium sulfate are commonly used as nitrogen fertilizers. After being applied to calcareous soil, the process of converting amide nitrogen into ammonium nitrogen and further converting ammonium nitrogen into nitrate nitrogen depends on alkali The rate of occurrence in the soil is relatively fast, and it is very easy to cause ammonium decomposition to cause volatilization loss or leaching loss in the form of nitrate with rainwater and irrigation water; and the applied phosphate fertilizers, such as double superphosphate, calcium phosphate, monoammonium phosphate, phosphoric acid Diammonium, etc. are easily absor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G5/00C05G3/90
CPCY02P60/21
Inventor 胡伟张炎王玲莉李青军孙九胜谢永军单娜娜
Owner SHIKEFENG CHEM IND
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