Saline-alkali soil is a general term for saline soil and alkaline earth. Saline soil mainly refers to salinized soils containing high chloride or sulfate. The soil is alkaline, but the pH is not necessarily high. Alkali soil refers to soils containing carbonates or heavy phosphates, with high pH values, alkaline soils, low organic matter content in saline-alkali soils, low soil fertility, poor physicochemical properties, and many negative cations and cations harmful to crops. Emergence. The principle of fertilizing saline-alkali soil is to use organic fertilizers and high-efficiency compound fertilizers to control the use of low-concentration fertilizers. Organic manure contains a large amount of organic matter and acts as a buffer to harmful cations and cations in the soil, which is conducive to rooting and promoting seedling growth. High-concentration compound fertilizer has less ineffective components and less residue, but the amount of chemical fertilizer can not be too high each time, so as to avoid aggravating the secondary salinization of soil. After application of chemical fertilizer, irrigation should be combined to reduce the concentration of soil solution.
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