Preparation of saline-alkali soil conditioner based on woody plant refining and using method of soil conditioner

Abstract

The invention discloses preparation of a saline-alkali soil conditioner based on woody plant refining and a using method of the soil conditioner and belongs to the field of soil agrochemistry. The preparation method comprises the following steps: acidizing woody plant residues with sulfuric acid, and performing low-temperature slow destructive distillation to obtain a woody plant source organic acid; and performing neutralizing gypsification on strong acidic woody plant biochar with equivalent quick lime, thereby obtaining the saline-alkali soil conditioner base; uniformly mixing the gypsifiedwoody plant biochar and a to-be-conditioned saline-alkali soil surface, spraying the woody plant source organic acid to promote calcium substitution of sodium ions in soil clay; covering the land with plant straws, inoculating plant lactobacillus to promote acid production, and finally performing alkali leaching with water; and performing drip irrigation and hole sowing of crops in the saline-alkali soil subjected to alkali leaching, performing no-tillage crop rotation, and performing intercropping cultivation. The source of the production materials is very wide and readily available, the cost is low, serious three-waste pollution is avoided in the preparation process, and the saline-alkali soil conditioner is an edged tool of saline-alkali soil improvement and is capable of rapidly obtaining economic and environmental returns.

Description

technical field

[0001] The invention belongs to the field of soil agricultural chemistry. The invention relates to a method for preparing and using a saline-alkali soil conditioner. Background technique

[0002] Saline-alkali soil means that there are soluble salts in the soil, such as Na + , Mg 2+ , CO 3 2- , Cl - And so on, and the soil with high salt concentration directly inhibits or harms plant growth mainly includes saline soil, salinized soil, alkaline soil and alkaline soil. At present, saline-alkali soil is widely distributed in China, mainly concentrated in North China, Northwest China, Northeast China and the eastern coastal areas, with a total area of ​​34.87 million hm 2 , accounting for about 25% of the country's arable land area, and the area that can be developed and utilized is as high as 200 million mu. Problems such as the reduction of arable land and the decline in food production brought about by soil salinization are bound to affect.

[0003] Th...