Method for improving saline alkali land by combination of biochar with organic fertilizer

A technology for organic fertilizers and saline-alkali land, applied in land preparation methods, fertilization devices, fertilizer mixtures, etc., can solve problems such as inability to plant in saline-alkali land, low crop or crop yield, etc., to promote the development of circular agriculture, provide improvement effects, and increase carbon sequestration. Effect

Inactive Publication Date: 2015-12-23
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Abstract
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  • Application Information

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Problems solved by technology

[0013] The present invention aims to solve the technical problem that crops cannot be grown in saline-alkali land or the

Method used

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  • Method for improving saline alkali land by combination of biochar with organic fertilizer

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specific Embodiment approach 1

[0027] Specific implementation mode one: the method for improving saline-alkali land by combination of biochar and organic fertilizer in this implementation mode is carried out according to the following steps:

[0028]1. Before soil preparation, mix the straw biochar and organic fertilizer evenly according to the weight ratio of 1:1-1.5, and carry out composting and fermentation at a temperature of 20-60°C to obtain decomposed fertilizer;

[0029] 2. Sprinkle the decomposed fertilizer evenly on the soil surface of the saline-alkali soil 0-2 days before the site preparation, and the application rate is 2000-2500kg / mu;

[0030] 3. Cross rotary tillage 1 to 2 times after spreading, and the depth of rotary tillage is 12-15cm. Immediately suppress after rotary tillage, and then sow.

[0031] In this embodiment, the application amount of straw biochar is within the range of 10-20 tons / ha, and the effect of soil improvement is positively correlated with the amount. From 2014 to 201...

specific Embodiment approach 2

[0032] Embodiment 2: This embodiment differs from Embodiment 1 in that the straw biochar described in step 1 is biochar formed by carbonization of crop straws, wherein crop straws include corn straw, rice straw, cotton straw, etc. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0033] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the organic fertilizer in Step 1 is forage animal manure, such as cow manure, sheep manure, etc. Others are the same as in the first or second embodiment.

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Abstract

Relating to a saline alkali land improvement method, the invention provides a method for improving saline alkali land by combination of biochar with an organic fertilizer, and aims to solve the technical problem that crops cannot be planted in saline alkali land or the crop yield is low. The method includes: 1. before land preparation, mixing straw biochar with the organic fertilizer in a weight ratio of 1:1-1.5 evenly, and conducting composting fermentation to obtain a decomposed fertilizer; 2. broadcasting the decomposed fertilizer on the surface of the saline alkali soil surface evenly 0-2 days before land preparation at a dosage of 2000-2500kg/667square meters; and 3. after broadcasting, carrying out cross rotary tillage 1-2 times to a depth of 12-15cm, then performing compaction immediately, and then carrying out sowing. The method provided by the invention is simple, only straw biochar and manure are used as the modifier, the raw materials are easily available, the cost is low, and the saline alkali land improvement effect is significant. The method provided by the invention is used for improving saline alkali land.

Description

technical field [0001] The invention relates to a method for improving saline-alkali land. Background technique [0002] The function of biochar as a soil improver originated from the discovery and research of the black soil (Terra Preta) in the Amazon Basin of South America. As early as 1500 years ago, South American Indians habitually improved the local soil with charcoal, manure and animal bones, forming a fertile soil. The soil of the Amazon Basin in South America, therefore, the carbon sequestration effect of biochar in the soil for hundreds or thousands of years has attracted people's attention. Since the 1990s, there has been increasing research on the production of biochar from pyrolyzed biomass and its use as a soil amendment and carbon sequestration agent. Foreign countries have carried out research work on the properties and characteristics of biochar and its effects on soil physics, chemical properties, microorganisms, and soil carbon sequestration, while China ...

Claims

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Application Information

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IPC IPC(8): C05G3/04A01B79/02C05G3/80
Inventor 刘长江王光华蒙静肖庆红武东波吴东升
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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