Controlled release fertilizer and method of preparing the same

A technology of controlled-release fertilizer and fertilizer granules, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of high production cost of controlled-release fertilizers and difficult for farmers to use, and achieve the effects of easy implementation, elimination of leaching, and simple equipment.

Inactive Publication Date: 2009-05-20
TOBACCO RES INST CHIN AGRI SCI ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In recent years, domestic scientific research units have made great progress in the above research, but the production cost of controlled release fertilizer is high, and it is difficult for farmers to use it. Exploring effective controlled release materials and suitable processing technology to reduce the production cost of controlled release fertilizer is currently the main problem to be solved

Method used

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Examples

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with specific embodiments.

[0023] The controlled-release fertilizer provided by the present invention is suitable for simple fertilizer or compound (mixed) fertilizer, and the inorganic coating material is wrapped outside the fertilizer particles. The inorganic coating material is aluminate cement or sulphoaluminate cement. According to the controlled release requirements of the controlled release fertilizer, the inorganic coating material accounts for 5% to 30% of the total mass of the controlled release fertilizer. The inorganic coating material is wrapped outside the fertilizer granules by a binder, and the binder includes cellulose, rosin, polyvinyl alcohol, polyacrylamide, gum arabic or peach gum. In specific use, cellulose is formulated into 2-10% aqueous solution, rosin is formulated into 5-25% water-alcohol solution (ethanol concentration 75-100%) or 2-20% petroleum ether solution, polyviny...

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Abstract

The invention relates to a fertilizer, in particular to a controlled release fertilizer and a preparation method thereof. The controlled release fertilizer enwraps inorganic coating materials outside fertilizer particles by adhesives, and the inorganic coating materials are aluminate cements or sulpho-aluminate cements, which account for 5% to 30% of the total weight of the controlled release fertilizer. The controlled release fertilizer can lead the fertilizer to slowly release in the soil and can meet the need of each growth period of crops by single application. The controlled release fertilizer can eliminate the leaching loss, volatilization and chemical fixation of nutrients in the soil and improve the utilization rate of the fertilizer. The preparation method of the controlled release fertilizer uses simple devices, is easy to be implemented and effectively reduces the production cost.

Description

technical field [0001] The invention relates to a class of fertilizers, in particular to a class of controlled-release fertilizers and a preparation method thereof. Background technique [0002] The agricultural practices of various countries in the world have shown that in order to obtain stable high yields, crops should receive sufficient nutrients, especially nitrogen, throughout the growth period. However, if a large amount of soluble mineral nutrient fertilizer is applied at one time, the crops will not have time to absorb it, which will cause nutrient loss and reduce the utilization rate of fertilizer. According to relevant data, the seasonal utilization rate of nitrogen fertilizer in China is more than ten percentage points lower than that of advanced countries. Part of the lost fertilizer seeps into the ground and rivers to pollute water sources, and the other part can generate nitric oxide and escape into the atmosphere, destroying the ozone layer. Chloride and su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 梁洪波元建高林董建新吴元华
Owner TOBACCO RES INST CHIN AGRI SCI ACAD
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