Saline-alkali soil conditioner and preparation method thereof

Abstract

The invention provides a saline-alkali soil conditioner. The saline-alkali soil conditioner is prepared from the following water-soluble components as raw materials: 3-13% of urea sulfate, 8-18% of organic acids, 2-8% of calcium superphosphate, 3-12% of polyaspartic acid compound and the balance of water. The raw materials are water-soluble components and are convenient to prepare and apply. The saline-alkali soil conditioner is reasonable and scientific in preparation, various components coordinate together such that hydrogen ions are quickly released, the alkalinity in the saline-alkali soil can be rapidly neutralized and the purpose of 'alkalinity reduction' is achieved; since the saline-alkali soil conditioner comprises both organic components and inorganic components, each component coordinates together, the content of activated sodium ions in the soil is reduced and the purpose of 'salt removal' is achieved; by the saline-alkali soil conditioner, the osmotic pressure of the saline-alkali land can be improved, the activity of an enzyme system in a plant is increased, the saline-alkali soil conditioner can be complexed with heavy metal ions in the saline-alkali soil so as to form high-molecular metal complexes and thus the pollution of heavy metals to the soil is reduced, the content of nitrogen, phosphorus and sulfur in the soil can be increased and the absorption of the plant to trace elements such as iron, zinc and manganese can be promoted.

Description

technical field [0001] The invention relates to the field of soil improvement, in particular to a saline-alkali soil improver and a preparation method thereof. Background technique [0002] Soil is an important resource for human survival, but land salinization has caused the destruction of resources, the huge loss of agricultural production and the threat to the biosphere and ecological environment, showing both environmental and economic hazards. In addition, the salinization process is often accompanied by the desertification process, and even promotes and transforms each other, which brings a series of environmental problems, affects the sustainable development of agriculture, and ultimately affects human life and health. The development and utilization of saline-alkali land can not only expand the area of ​​cultivated land and increase the yield per unit area, thereby increasing the total grain output and alleviating the food crisis; it can also expand the green area, i...

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Problems solved by technology

[0004] According to incomplete statistics from UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which 99.13 million hectares is in my country. A variety of improvement and control methods for saline-alkali land have been proposed, and these methods can be roughly divided into physical improvement methods, chemical improvement methods, biological improvement methods and comprehensive improvement methods. Although these methods have achieved certain results, there are generally engineering Due to technical problems such as high cost, inconspicuous improvement effect, unsustainable application, and difficulty in large-scale promotion, it is necessary to develop a fast, efficient, and long-lasting saline-alkali soil improver

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