Production method of special network controlled-release fertilizer for eucalyptus

A special network and production method technology, applied in the application, fertilization device, fertilizer mixture, etc., can solve the problems of difficulty in accurately grasping the amount of fertilizer applied, difficulty in developing the fast growth of eucalyptus, labor and time-consuming top dressing, etc., to achieve less return and stable release , the effect of slow nutrient release

Active Publication Date: 2013-03-20
ZHENGZHOU UNIV
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Problems solved by technology

Due to the rapid growth of eucalyptus and the fast nutrient cycle in the forest, the demand for soil nutrients is high. However, the special fertilizer for eucalyptus currently available on the market is powdery or small particle fertilizer, and its fertilization is divided into base fertilizer and topdressing. It needs to be topdressed for three years, otherwise it will be difficult to take advantage of the fast-growing eucalyptus
However, topdressing is labor-intensive and increases costs, and it is difficult to accurately grasp the amount of fertilizer applied, which may easily lead to insufficient or excessive fertilization

Method used

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  • Production method of special network controlled-release fertilizer for eucalyptus

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example 1

[0022] Coating material configuration: nitrocellulose 7.10 kg, linseed oil modified aniline formaldehyde resin 1.50 kg, maleic anhydride rosin ester 2.50 kg, medium oil castor oil alkyd resin 5.00 kg, dibutyl phthalate 2.50 kg, 31.40 kg of mixed solvents were mixed evenly for later use; the mixed solvent formula was: 1.40 kg of alcohol, 2.80 kg of butanol, 5.25 kg of ethyl acetate, 8.75 kg of butyl acetate, and 13.20 kg of toluene.

[0023] First, 100 kg of granular urea (containing 46% nitrogen) and 500 kg of monoammonium phosphate (containing 11% nitrogen, containing 44% phosphorus pentoxide) preheated to 75 degrees were added to the drum coating machine, and the above preparation 50 kg of good coating materials are evenly added to the material in the drum coating machine for coating. After coating, 300 kg of potassium chloride (potassium oxide content 50%) and 100 kg of magnesium sulfate were added in sequence, and after mixing evenly, the mixture was added to an extrusion ...

example 2

[0025] Coating material configuration: nitrocellulose 14.00 kg, linseed oil modified aniline formaldehyde resin 2.80 kg, maleic anhydride rosin ester 2.10 kg, medium oil castor oil alkyd resin 7.00 kg, dibutyl phthalate 4.90 kg, 39.20 kg of mixed solvents were mixed evenly for later use; the mixed solvent formula was: 1.57 kg of alcohol, 3.14 kg of butanol, 5.25 kg of ethyl acetate, 7.80 kg of butyl acetate, and 21.44 kg of toluene.

[0026] First, 150 kg of granular urea (containing 46% nitrogen) and 450 kg of monoammonium phosphate (containing 11% nitrogen, containing 44% phosphorus pentoxide) preheated to 65 degrees were added to the drum coating machine, and the above preparation 70 kg of good coating material is evenly added to the material in the drum coating machine for coating. After the coating is completed, 380 kg of potassium sulfate (potassium oxide content 50%) and 150 kg of magnesium sulfate are added in sequence. After mixing evenly, the mixture is added to an e...

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Abstract

The invention relates to a production method of a special network controlled-release fertilizer for eucalyptus, belonging to the technical field of preparation of fertilizers. The production method comprises the following steps: adding granular urea and monoammonium phosphate which are preheated to 50-100 DEG C into a rotating drum coating machine, and coating with a coating material; after finishing the coating, adding a potassium fertilizer and magnesium sulfate, evenly mixing, and adding the mixture into an extrusion granulator to carry out extrusion granulation; and curing and cooling the granulated semi-finished product by standing at natural temperature for 1-30 hours, and screening to obtain the finished product. The special network controlled-release fertilizer for eucalyptus with the diameter of 10-100 millimeters and the weight of 10-500g can be produced according to the size of the mold of the extrusion granulator. Compared with the common coated controlled-release fertilizer, the special network controlled-release fertilizer for eucalyptus has the advantages of lower cost, stable nutrient release, uniform nutrition in every granule, and fixed weight, can implement precise fertilizer application, and reduces the fertilizer application frequency and labor investment.

Description

technical field [0001] The invention relates to a production method of a special network-controlled release fertilizer for eucalyptus, which belongs to the technical field of fertilizer manufacturing, and specifically relates to the production of a network-structured eucalyptus controlled-release fertilizer using urea, monoammonium phosphate, potassium chloride, and potassium sulfate as main raw materials. Fat technical methods. Background technique [0002] Controlled-release fertilizers refer to fertilizers that pre-set the release mode (release rate and release time) of nutrients in the fertilizer during the crop growth season by various regulatory mechanisms to make them consistent with the law of crop absorption of nutrients. After ordinary fertilizers are applied to the soil, excessive nutrients are released in the early stage, and plants cannot fully absorb them in a short period of time. Nutrients are easily volatilized, leached or fixed by the soil, and there is a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G3/90
Inventor 张文辉谷守玉万亚珍梅丹丹
Owner ZHENGZHOU UNIV
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