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Sustained-release mixed fertilizer and preparation method thereof

A mixed fertilizer and slow-release technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve problems such as secondary pollution, and achieve the effects of protecting the environment, increasing water absorption and water retention, and increasing biodegradability.

Inactive Publication Date: 2016-02-03
全椒县琪悦家庭农场
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the proportion of coated fertilizers in slow-release fertilizers is the largest, and the coating materials are mostly organic synthetic polymers that are difficult to degrade, which will cause secondary pollution. Therefore, it is necessary to provide a multifunctional and degradable slow-release fertilizer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of slow release mixed fertilizer, its raw material comprises by weight: 30 parts of urea, 25 parts of potassium dihydrogen phosphate, 10 parts of potassium silicate, 5 parts of magnesium sulfate, 8 parts of calcium chloride, 0.4 part of zinc sulfate, 0.3 part of copper nitrate 1.5 parts of sodium borate, 0.1 parts of ferric chloride, 0.3 parts of manganese sulfate, 0.3 parts of ammonium molybdate, 29 parts of sodium alginate, 40 parts of coating material, 10 parts of biochar, 10 parts of soybean meal, 15 parts of humic acid , 10 parts of straw, 12 parts of plant ash, and 5 parts of high-head black powder;

[0025] Among them, the preparation method of the coating material is as follows: adding chitosan to water, ultrasonically dispersing evenly, adding fumaric acid and aluminum chloride and mixing evenly, heating up to 80°C, stirring for 4 hours at heat preservation, and adjusting the pH to 7.5 with aqueous sodium bicarbonate solution , add acetone to settle, fil...

Embodiment 2

[0031] A kind of slow release mixed fertilizer, its raw material comprises by weight: 40 parts of urea, 15 parts of potassium dihydrogen phosphate, 20 parts of potassium silicate, 3 parts of magnesium sulfate, 10 parts of calcium chloride, 0.2 parts of zinc sulfate, 0.5 parts of copper nitrate 0.5 parts of sodium borate, 0.3 parts of ferric chloride, 0.1 parts of manganese sulfate, 0.5 parts of ammonium molybdate, 22 parts of sodium alginate, 50 parts of coating material, 5 parts of biochar, 15 parts of soybean meal, 10 parts of humic acid , 15 parts of straw, 8 parts of plant ash, and 7 parts of high-head black powder;

[0032]Among them, the preparation method of the coating material is as follows: adding chitosan to water, ultrasonically dispersing evenly, adding fumaric acid and aluminum chloride and mixing evenly, heating up to 70°C, stirring for 6 hours, and adjusting the pH to 6.5 with aqueous sodium bicarbonate solution , add acetone to settle, filter, wash the precipi...

Embodiment 3

[0038] A slow-release mixed fertilizer, the raw materials of which include by weight: 32 parts of urea, 23 parts of potassium dihydrogen phosphate, 13 parts of potassium silicate, 4.5 parts of magnesium sulfate, 8.5 parts of calcium chloride, 0.35 parts of zinc sulfate, 0.35 parts of copper nitrate 1.2 parts of sodium borate, 0.15 parts of ferric chloride, 0.25 parts of manganese sulfate, 0.35 parts of ammonium molybdate, 26 parts of sodium alginate, 43 parts of coating material, 9 parts of biochar, 11 parts of soybean meal, 14 parts of humic acid , 12 parts of straw, 10 parts of plant ash, 5.5 parts of Wu Tau Wu powder;

[0039] Among them, the preparation method of the coating material is as follows: adding chitosan into water, ultrasonically dispersing evenly, adding fumaric acid and aluminum chloride to mix, raising the temperature to 77° C., stirring for 4.5 hours with heat preservation, and adjusting the pH with aqueous sodium bicarbonate solution. 7.2, add acetone to se...

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PUM

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Abstract

The invention discloses a sustained-release mixed fertilizer. The sustained-release mixed fertilizer comprises the following raw materials in parts by weight: 30 to 40 parts of urea, 15 to 25 parts of monopotassium phosphate, 10 to 20 parts of potassium silicate, 3 to 5 parts of magnesium sulfate, 8 to 10 parts of calcium chloride, 0.2 to 0.4 part of zinc sulfate, 0.3 to 0.5 part of copper nitrate, 0.5 to 1.5 parts of sodium borate, 0.1 to 0.3 part of ferric chloride, 0.1 to 0.3 part of manganese sulfate, 0.3 to 0.5 part of ammonium molybdate, 22 to 29 parts of sodium alginate, 40 to 50 parts of coating material, 5 to 10 parts of biochar, 10 to 15 parts of soybean meal, 10 to 15 parts of humic acid, 10 to 15 parts of straw, 8 to 12 parts of plant ash, and 5 to 7 parts of Gaotouwu powder. The invention also discloses a preparation method of the sustained-release mixed fertilizer. The sustained-release mixed fertilizer can control various elements to be released slowly, can improve the soil and can be used for sterilization and weed control, the coating material can be biologically degraded, and the environment can be protected.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a slow-release mixed fertilizer and a preparation method thereof. Background technique [0002] China is a large agricultural country, and it is also the largest producer and consumer of chemical fertilizers in the world today. Chemical fertilizers play a pivotal role in increasing food production. The main problem in the current use of chemical fertilizers is that most of the fertilizers used are ordinary quick-acting chemical fertilizers. In addition to unreasonable fertilization measures, the utilization rate of fertilizers has been reduced, resulting in waste of resources, environmental pollution, and decline in the quality of agricultural products. [0003] Compared with traditional fertilizers, slow-release fertilizers have many advantages, such as reducing nutrient loss and greatly improving fertilizer utilization efficiency, etc., which have become a research hotspot...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 宗春峰
Owner 全椒县琪悦家庭农场
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