Preparation method and application method of biochar-based soil structure conditioning agent

A soil structure and application method technology, applied in the field of soil environmental management, can solve problems such as poor adaptability and insignificant effect, and achieve the effects of solving the side effects of hardening, good application effect, and maintaining the air permeability and water retention of aggregates.

Inactive Publication Date: 2018-11-23
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, biochar has the problem of poor adaptability and insignificant effect in the process of maintaining the stability of soil aggregate structure.

Method used

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  • Preparation method and application method of biochar-based soil structure conditioning agent
  • Preparation method and application method of biochar-based soil structure conditioning agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation and application method of a biochar-based soil structure conditioner, comprising the steps of:

[0031] 1) After air-drying and crushing agricultural and forestry plant waste, pass it through a 2mm sieve, pyrolyze it at 500°C for 3 hours with limited oxygen, make it carbonized in a carbonization furnace, crush the volcanic rock and vermicompost and pass it through a 2mm sieve; the cationic polyacrylamide Dissolved with water to obtain a 0.5wt% polyacrylamide solution;

[0032] 2) Soil conditioner ingredients: prepare solid raw materials according to the soil structure conditioner added per 100 parts by weight of soil, including: 3 parts by weight of biochar, 1 part by weight of plant fiber material, 1 part by weight of volcanic stone, and 0.1 part by weight of earthworm Feces, 0.1 parts by weight of humic acid, 0.1 parts by weight of bentonite and 0.01 parts by weight of saline-alkali-resistant microbial bacterial agents;

[0033] 3) Preparation of the so...

Embodiment 2

[0041] This example adopts the preparation method described in Example 1 to prepare and apply the biochar soil conditioner to improve the field soil structure. The difference is that:

[0042] During application, 35 parts by weight of polyacrylamide solution and 1 part by weight of biochar are added to every 100 parts by weight of soil.

[0043] Use the biochar soil structure conditioner of this embodiment to condition the soil, plant rice, and set a blank group with unimproved soil:

[0044] The test soil was collected from the reed wetland soil in the Yellow River Delta. The soil pH is 8.41 and the salinity is 0.45. Rice cultivation adopts indoor pot experiment. Rice fertilization adopts conventional base fertilizer + foliar silicon fertilizer, that is, the base fertilizer is 21g of urea, 12g of diammonium phosphate, and 7.5g of potassium sulfate per cubic meter of soil, and 0.3g of foliar silicon fertilizer is sprayed per cubic meter of soil at the booting stage ~1.2g. ...

Embodiment 3

[0047] This example adopts the preparation method described in Example 1 to prepare and apply the biochar soil conditioner to improve the field soil structure. The difference is that:

[0048] During application, 45 parts by weight of polyacrylamide solution and 5 parts by weight of biochar are added to every 100 parts by weight of soil.

[0049] Use the biochar soil structure conditioner of this example to condition the soil, plant soybeans, and set a blank group with unimproved soil:

[0050] The test soil was collected from the tidal flats along Jiaozhou Bay. The soil pH is 8.02 and the salinity is 0.91. Soybean cultivation adopts indoor pot experiment. Soybean fertilization adopts conventional farmhouse basal fertilizer, that is, 50 g of farmhouse organic fertilizer is applied to the basal fertilizer per cubic meter of soil. After the soybeans have matured, the pods are harvested and yield testing is performed according to the normal procedure. At the same time, soybea...

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Abstract

The invention provides a biochar-based soil structure conditioning agent and an application method thereof and relates to the field of soil environment management. A preparation method provided by theinvention comprises the following steps: adding solid-state raw materials for preparing the structure conditioning agent into each 100 parts of soil by weight, wherein the solid-state raw materials comprise biochar, a plant fiber material, lava rock, earthworm cast, humic acid, bentonite and a salt-resisting and alkali-resisting microorganism bacterium agent; alternately mixing a polyacrylamide solution and a raw material solid mixture with soil until a conditioning agent soil aggregate with the grain diameter of (0.25 to 10)cm is generated by grains of the soil. According to the preparationmethod provided by the invention, the formation of a soil aggregate structure can be remarkably promoted; meanwhile, the biochar-based soil structure conditioning agent has an excellent application effect in the aspects of keeping the stability of the aggregate structure, promoting the growth of crops, improving the yield of the crops and the like.

Description

technical field [0001] The invention relates to the field of soil environment treatment, in particular to a biochar-based soil structure conditioner and its preparation method and application. Background technique [0002] The soil aggregate structure is an aggregate composed of several soil single grains and humus bonded together. The particle size is in the range of 0.25-10mm, and it is approximately spherical. Soil aggregate structure is the foundation of good soil, and plays an important role in maintaining loose soil environment, coordinating soil moisture content and nutrient supply, etc. In addition, a good soil aggregate structure is conducive to maintaining the activity of soil microorganisms, improving the level of soil cultivation and ensuring the sustainable production of agriculture. [0003] In recent years, with the development and utilization of coastal waters, a large amount of low-quality soil has been produced in the process of land reclamation. This ty...

Claims

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Application Information

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IPC IPC(8): C09K17/50C09K17/40C09K101/00
CPCC09K17/40C09K17/50C09K2101/00
Inventor 李锋民郑浩张宇婵
Owner OCEAN UNIV OF CHINA
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