A saline-alkali soil improver and its special microcapsule organic acid slow-release preparation

Abstract

The present invention discloses a saline-alkali soil modifier and a special microcapsule-type organic acid slow-release preparation thereof. The special microcapsule-type organic acid slow-release preparation is prepared from the following components by weight: 100 parts of water, 1-80 parts of an organic acid, 10-50 parts of a copolymerization monomer, 0.2-10 parts of an emulsifier, 100-500 parts of an organic solvent and 0.05-5 parts of an initiator. The saline-alkali soil modifier comprises, by weight, 1-30 parts of the organic acid slow-release preparation and 60-90 parts of active calcium. Compared with the existing saline-alkali soil modifier in the prior art, the saline-alkali soil modifier of the present invention has the following advantages that the calcium ions are provided while the organic acid substances are slowly released, the salt damage caused by the applied soil modifier can be effectively reduced, the release time of the organic acid can be significantly prolonged, the saline-alkali soil modifier acts in the whole growing and developing period of crops, the continuous damage of salt accumulation and alkali accumulation on crops can be effectively reduced, crops can be protected from salt damage and alkali damage during the whole growth period, the crop yield can be improved, and the improving effect on the high saline-alkali soil can be comprehensively improved.

Description

technical field [0001] The invention relates to a soil improver, in particular to a saline-alkali soil improver and its special microcapsule organic acid slow-release preparation. Background technique [0002] Saline-alkali land or saline soil is a general term for various types of soil affected by the saline-alkali components in the soil, including various saline soils and alkaline soils, and other types of soils with different degrees of salinization and alkalization (Dong Hezhong, 2010). When the accumulation of water-soluble salts in the soil surface or subsurface layer exceeds 1-2g / kg or the alkalization degree of the soil alkalization layer exceeds 5%, the soil belongs to the range of saline-alkali land. Saline-alkali land includes saline soil, alkaline soil and different degrees of salinized and alkalized soil (Yang Jinsong, 2005). [0003] Saline-alkali soils are widely distributed in my country, mainly including coastal saline-alkali land in the east, saline-alkali...

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Problems solved by technology

[0006] At the same time, we found that although there are many kinds of chemical agents, biological agents, organic matter, etc., most of them are applied to the soil at one time. Although they can neutralize alkaline soil and reduce soil alkalinity in a short time, but at the same time It will cause a rapid increase in the concentration of salt ions, aggravate the occurrence of salt damage, and crop seeds will not germinate, lack seedlings, and burn seedlings.

At the same time, due to the long growing season of crops, under the action of climate drought and other factors, the phenomenon of soil returning to salt and alkali continues to occur, which seriously affects the growth of crops in the middle and late stages, and has a fatal impact on crop yield, resulting in poor improvement effect of saline-alkali land , the cost of improvement remains high, and the contradictions in application and promotion are prominent

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