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Granular fertilizer special for environment-friendly saline-alkali soil and preparation method thereof

An environmentally friendly, granular fertilizer technology, applied in the direction of ammonium salt fertilizer, application, nitrogen fertilizer, etc., can solve the problems of weak efficacy, weakening fertilizer efficiency, and affecting fertilizer effectiveness in saline-alkali land

Inactive Publication Date: 2018-12-07
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
[0007] In addition, since Shanxi is a major province of coal mining, after over-excavation, the remaining coal gangue becomes a kind of solid waste with a huge storage capacity. The technology of preparing saline-alkali land improvement fertilizer from coal gangue only uses one kind of solid waste, and there is a general defect that the existing saline-alkali land fertilizer is weakened by saline-alkali land

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An environment-friendly special granular fertilizer for saline-alkali land, which is made from a core material layer, a slow-release layer, a soil action layer and a coating layer in a weight ratio of 20:5:20:1 from the inside to the outside, and its preparation It is achieved through the following steps:

[0027] 1) Mix 2 parts of urea, 4 parts of ammonium sulfate, 1 part of ferrous sulfate, and 2 parts of zinc sulfate evenly and pulverize them for later use. Roast 5 parts of phosphate rock powder and coke at 500°C for 7 hours, cool, and pulverize through 60 mesh Sieve to obtain the roasted phosphate rock powder; mix the roasted phosphate rock powder with 20 parts of high-sulfur coal gangue microbial fermentation products, and culture it with intermittent stirring at 40°C for 2 days, then mix it with the rest of the raw materials evenly, and use a high-tower The granulator melts and granulates to obtain the core material layer (by weight);

[0028] 2) Mix carboxylated...

Embodiment 2

[0032] An environment-friendly special granular fertilizer for saline-alkali land, which is made from a core material layer, a slow-release layer, a soil action layer and a coating layer in a weight ratio of 30:1:25:1 from the inside to the outside, and its preparation It is achieved through the following steps:

[0033] 1) Mix 4 parts of urea, 2 parts of ammonium sulfate, 4 parts of ferrous sulfate, and 1 part of zinc sulfate evenly and pulverize them for later use. Roast 8 parts of phosphate rock powder and coke at 800°C for 5 hours, cool, and pulverize through 60 mesh Sieve to obtain the roasted phosphate rock powder; mix the roasted phosphate rock powder with 30 parts of high-sulfur coal gangue microbial fermentation products, and culture it with intermittent stirring at 36°C for 3 days, then mix it with the rest of the raw materials evenly, and use a high-tower The granulator melts and granulates to obtain the core material layer (by weight);

[0034] 2) Mix carboxylated...

Embodiment 3

[0038] An environment-friendly special granular fertilizer 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 25:3:23:1 from the inside to the outside, and its preparation It is achieved through the following steps:

[0039]1) Mix 3 parts of urea, 3 parts of ammonium sulfate, 2 parts of ferrous sulfate, and 1.5 parts of zinc sulfate and grind them for later use. Roast 7 parts of phosphate rock powder and coke at 620°C for 6 hours, cool, and crush them through 60 mesh Sieve to obtain the roasted phosphate rock powder; mix the roasted phosphate rock powder with 26 parts of high-sulfur coal gangue microbial fermentation products, and culture it with intermittent stirring at 38°C for 2 days, then mix it with the rest of the raw materials evenly, and use a high tower The granulator melts and granulates to obtain the core material layer (by weight);

[0040] 2) Mix ...

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Abstract

The invention discloses a granular fertilizer special for environment-friendly saline-alkali soil and a preparation method thereof. The granular fertilizer is prepared from a core layer, a slow release layer, a soil acting layer and an enveloping layer at a certain ratio from inner to outer. The granular fertilizer with a four-layer cladding structure is acquired through repeated pelletizing. Before the granular fertilizer disclosed by the invention is applied to soil, the enveloping layer in the granular fertilizer is capable of preventing the granular fertilizer from deliquescing and keepinghigher fertilizer efficiency; after the granular fertilizer is applied to the saline-alkali soil, the enveloping layer is dissolved under the action of water in the soil, and then the fertilizer in the soil acting layer is gradually released into the surrounding saline-alkali soil and the saline-alkali soil can be specifically and extremely improved; when the saline-alkali soil is recovered to astate suitable for planting, the core layer mainly used for nourishing crops starts to slowly release under the action of the slow release layer, the fertilizer in the core layer is not influenced bythe saline-alkali soil and is extremely used for promoting the crop growth; all the layers have a definite purpose and perform own functions, so that the granular fertilizer can be fully utilized.

Description

technical field [0001] The invention belongs to the field of fertilizers, in particular to an environment-friendly special granular fertilizer 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05B1/02C05G3/00C05G3/80C05G5/30C05G5/37C05B17/00C05C3/00C05C9/00C05C9/02C05D1/02C05D9/02
Inventor 李娅王扬贺康
Owner 贺康
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