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Special granular fertilizer suitable for saline-alkali land, and preparation method thereof

A technology of granular fertilizer and saline-alkali land, which is applied in the direction of ammonium salt fertilizer, application, nitrogen fertilizer, etc., and can solve the problems affecting the effectiveness of fertilizers in saline-alkali land and weak efficacy

Inactive Publication Date: 2018-11-30
贺康
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the problem that traditional technology can no longer meet the needs of saline-alkali land improvement and continuous improvement of agricultural productivity, exploring new saline-alkali land improvement technology has become an urgent scientific problem to be solved
[0006] At present, in order to grow more kinds of crops on saline-alkali land, various types of saline-alkali soil fertilizers have appeared, but due to the particularity of the saline-alkali soil, a large part of the fertilizer has reacted with saline-alkali land, making the fertilizer used to nourish crops The potency is already very weak, which greatly affects the potency of fertilizers in saline-alkali soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A special granular fertilizer suitable for saline-alkali land, which is made from the core material layer, the slow-release layer, the soil effect layer and the coating layer according to the weight ratio of 20:5:20:1 from the inside to the outside, and its preparation is through It is achieved by the following steps:

[0025] 1) Mix 20 parts of decomposed sheep manure, 5 parts of rhizobia fertilizer, 2 parts of urea, 4 parts of ammonium sulfate, 1 part of ferrous sulfate, and 2 parts of zinc sulfate in the following parts by weight, mix and grind, add 5 parts of glycerin and mix Uniform, melted and granulated by a high-tower granulator to obtain a core material layer;

[0026] 2) Mix carboxylated chitosan and bentonite at a ratio of 1:2 for later use, place the core material layer obtained in step 1) in a drum granulator, then add the mixed slow-release layer raw materials, and fully contact Until the raw material of the slow-release layer is evenly attached to the su...

Embodiment 2

[0030] A kind of special granular fertilizer suitable for saline-alkali land, which is made from the core material layer, the slow-release layer, the soil effect layer and the coating layer according to the weight ratio of 30:1:25:1 from the inside to the outside, and its preparation is through It is achieved by the following steps:

[0031] 1) Mix 25 parts of decomposed sheep manure, 3 parts of rhizobia fertilizer, 4 parts of urea, 2 parts of ammonium sulfate, 4 parts of ferrous sulfate, and 1 part of zinc sulfate in the following parts by weight, mix and grind, add 15 parts of glycerin and mix Uniform, melted and granulated by a high-tower granulator to obtain a core material layer;

[0032] 2) Mix carboxylated chitosan and bentonite at a ratio of 1:2 for later use, place the core material layer obtained in step 1) in a drum granulator, then add the mixed slow-release layer raw materials, and fully contact Until the raw material of the slow-release layer is evenly attached ...

Embodiment 3

[0036] A special granular fertilizer suitable for saline-alkali land, which is made from the core material layer, the slow-release layer, the soil action layer and the coating layer according to the weight ratio of 25:3:23:1 from the inside to the outside, and its preparation is through It is achieved by the following steps:

[0037] 1) Mix 23 parts of decomposed sheep manure, 4 parts of rhizobia fertilizer, 3 parts of urea, 3 parts of ammonium sulfate, 2 parts of ferrous sulfate, and 1.5 parts of zinc sulfate in the following parts by weight and grind them evenly, add 10 parts of glycerin and mix Uniform, melted and granulated by a high-tower granulator to obtain a core material layer;

[0038] 2) Mix carboxylated chitosan and bentonite at a ratio of 1:2 for later use, place the core material layer obtained in step 1) in a drum granulator, then add the mixed slow-release layer raw materials, and fully contact Until the raw material of the slow-release layer is evenly attache...

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Abstract

The invention discloses a special granular fertilizer suitable for saline-alkali land, and a preparation method thereof, wherein the special granular fertilizer is prepared sequentially from a core material layer, a sustained-release layer, a soil action layer and a coating layer according to a certain ratio from inside to outside, and the granular fertilizer having the four-layer coated structureis obtained through multiple granulation. According to the present invention, the coating layer in the granular fertilizer can prevent the granular fertilizer from deliquescene before the applicationinto the soil so as to maintain the high fertilizer efficiency; after the special granular fertilizer is applied into the saline-alkali land soil, the added coating layer is dissolved under the action of the water of the soil layer, and the fertilizer in the soil action layer is gradually released into the peripheral saline-alkali land, such that the saline-alkali land soil is subjected to targeted improvement to the maximum extent; when the saline-alkali land is repaired to a suitable planting state, the core material layer mainly for nourishing crops is slowly released under the action of the sustained-release layer, such that the fertilizer in the core material layer is not affected by the saline-alkali land soil so as to act on the crop growth to the maximum extent; and various layerrespectively provide the effects in the targeted manner so as to achieve the optimal effect of the granular fertilizer.

Description

technical field [0001] The invention belongs to the field of fertilizers, in particular to a special granular fertilizer suitable for saline-alkali land and a preparation method thereof. Background technique [0002] Throughout the history of agricultural development at home and abroad, the history of improvement and utilization of saline-alkali land is accompanied by the development of agriculture. With the rapid development of human civilization and science and technology, the research work on the improvement and utilization of saline-alkali land is also advancing with the times. The improvement and utilization of saline-alkali land is a complex systematic project, and there are different effective improvement methods for different types of saline-alkali land, but they can be summarized into three categories, namely physical improvement, chemical improvement and biological improvement. [0003] Among the many saline-alkali soil improvement methods, the plant improvement t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05B1/02C05G3/00C05G5/12C05G5/30C05C3/00C05C9/00C05D1/02C05D9/00C05D9/02C05F3/00C05F11/08
Inventor 李娅王炳华贺康
Owner 贺康
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