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Water-retention and slow-release fertilizer

A technology of slow-release fertilizers and slow-release fertilizers, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of poor controlled-release performance of low-solubility slow-release fertilizers, unsatisfactory slow-release effects of fertilizers, and reduced water absorption and retention capabilities. Achieve the effect of reducing irrigation cost, improving nutrient utilization rate, and easy application

Active Publication Date: 2013-03-20
GUANGDONG DAZHONG AGRI SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low-solubility slow-release fertilizers can be produced with ordinary disc or drum granulation equipment. The cost of the production process is low, and the price of fertilizers is low. However, the controlled-release performance of low-solubility slow-release fertilizers is poor, and the slow-release effect of fertilizers is often not ideal.
[0004] Water-retaining agent and slow-release fertilizer are usually mixed and applied, but when water-retaining agent and slow-release fertilizer are mixed, it is easy to reduce its swelling ability and water absorption and water retention capacity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 70 kg of potassium chloride-coated slow-release fertilizer, 5 kg of starch-grafted acrylonitrile water-retaining agent, 10 kg of cellulose-grafted acrylonitrile water-retaining agent, 1 kg of EM biological bacteria, 5 kg of humic acid, and a particle size of 0.01cm Add 5 kg of biomass coke into a blender and stir evenly, pack into bags, and obtain water-retaining slow-release fertilizer.

[0023] With the water-retaining slow-release fertilizer of this embodiment, the pot plant test was applied separately with the conventional slow-release fertilizer. Under the condition of equal nitrogen, phosphorus and potassium nutrient content, the water-retaining slow-release fertilizer was more obvious than the conventional slow-release fertilizer. The water use efficiency is increased by 55%, and the nutrient use efficiency is increased by about 12%; the flowering period is prolonged, the flower color is bright, and the ornamental value of flowers is improved.

Embodiment 2

[0025] 75 kg of low-solubility slow-release fertilizer urea-formaldehyde, 4.5 kg of starch-grafted acrylonitrile water-retaining agent, 13.5 kg of cellulose-grafted acrylamide water-retaining agent, 1 kg of EM biological bacteria, 8 kg of humic acid, and raw materials with a particle size of 0.05 cm Add 10 kilograms of material coke into a blender and stir evenly, and pack into bags to obtain a water-retaining slow-release fertilizer.

[0026] Using the water-retaining and slow-release fertilizer of this example, and using the conventional slow-release fertilizer separately to carry out the rape test, under the condition of equal nitrogen, phosphorus, and potassium nutrient contents, the water-retaining and slow-release fertilizer is more obvious than the conventional slow-release fertilizer. Reduced, water use efficiency increased by 50%, nutrient use efficiency increased by about 10%; rapeseed yield increased by 30%.

Embodiment 3

[0028] 45 kg of urea, 35 kg of diammonium phosphate, 4 kg of starch-grafted acrylamide water-retaining agent, 16 kg of cellulose-grafted acrylamide water-retaining agent, 2 kg of EM biological bacteria, 10 kg of humic acid, and a particle size of 0.01-0.1cm 15 kg of biomass coke was added into a blender and stirred evenly, and bagged to obtain a water-retaining slow-release fertilizer.

[0029] With conventional urea, diammonium phosphate, and potassium chloride as base fertilizers, a comparative experiment was carried out in wheat field production. Under the condition of equal nitrogen, phosphorus, potassium, and silicon nutrient contents, the application of conventional fertilizers released nutrients quickly, and the growth of wheat seedlings was slightly lower. However, after entering the vegetative growth period and the reproductive growth period, the water-retaining slow-release fertilizer implemented in this implementation gradually exerts its advantages.

[0030] The te...

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Abstract

The invention belongs to the technical field of fertilizers and specifically relates to a water-retention and slow-release fertilizer. The water-retention and slow-release fertilizer comprises the following raw materials in parts by weight: 70-80 parts of coated slow-release fertilizer or low-solubility slow-release fertilizer, 15-20 parts of water retention agent, 1-2 parts of biological bacteria, 5-10 parts of humic acid and 5-15 parts of soil conditioner. The prepared water-retention and slow-release fertilizer disclosed by the invention has the advantages of low cost and simplicity and convenience in application, and can adjust the water absorbency of the fertilizer according to different crops, soil, climate and other conditions and be widely applied to grain crops, cash crops, horticultural plants and the like. The water-retention and slow-release fertilizer disclosed by the invention has long effective period, and can greatly reduce the loss of the fertilizer caused by volatilization and eluviation, enable the limited fertilizer and water to be fully absorbed and utilized by the plants, achieve the integration of the water and the fertilizer and improve the soil. Through the application of the water-retention and slow-release fertilizer, the irrigation cost of farmland can be reduced and the high-efficient water conservation purpose can be achieved. The water-retention and slow-release fertilizer disclosed by the invention can greatly improve the utilization rate of nutrients and effectively control the pollution of the crops and an environment caused by the application of the fertilizer.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, in particular to a water-retaining slow-release fertilizer. Background technique [0002] Fertilizer is a kind of substance that provides one or more essential nutrients for plants, improves soil properties, and improves soil fertility. It is one of the material basis of agricultural production. [0003] Slow-release fertilizer, also known as slow-acting fertilizer, is a new type of fertilizer developed in recent years. This type of fertilizer can replace part of the functions of organic fertilizers, reduce the loss of nutrients in fertilizers, improve fertilizer efficiency, and reduce soil pollution from fertilizers. Slow-release fertilizers mainly include coated fertilizers and low-solubility fertilizers. Coated fertilizer is to improve the function or performance of the fertilizer. The surface of its particles is coated with a layer of fertilizer with a microporous hydrophobic and insolub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 林小明
Owner GUANGDONG DAZHONG AGRI SCI CO LTD
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