Soil amendment for saline and alkaline land, and preparation and application methods thereof

Abstract

The invention discloses a soil amendment for saline and alkaline land. The soil amendment comprises powder and water aqua. The powder comprises, by weight, 10 to 15 parts of organic bentonite, 2 to 5 parts of modified rectorite, 10 to 20 parts of organic fertilizer, 10 to 20 parts of humus, 15 to 30 parts of composite fertilizer, 3 to 8 parts of amino acid, 0.5 to 1 part of polyacrylamide and 0.3 to 1 part of biological flora. The water aqua comprises, by weight, 12 to 20 parts of citric acid, 20 to 35 parts of maleic anhydride, 10 to 20 parts of wood vinegar, 3 to 5 parts of amino acid, 3 to 5 parts of free humic acid and 0.2 to 0.5 part of polyacrylamide. Meanwhile, the invention provides a preparation method and application method for the soil amendment. The soil amendment is target to saline and alkaline soil in the north of China; and through cooperative usage of the powder and the water aqua, the soil amendment exerts good improvement effect and is fact in action.

Description

technical field [0001] The invention relates to the field of saline-alkali land improvement, in particular to a saline-alkali land soil improver and a preparation and application method thereof. Background technique [0002] Saline-alkali land is a kind of soil type widely distributed in the world, and it is an important land resource. The saline-alkali land area in the world is about 15 billion mu, and the saline-alkali land area in my country is about 540 million mu, accounting for one-thirtieth of the world; the saline-alkali land in my country is about 90 million mu, and the cultivated land in my country is only 1.5 billion mu, accounting for nearly one-tenth of the cultivated land area in my country. one fifth. At present, it has become the biggest obstacle restricting the construction of ecological environment and the sustainable development of agriculture in our country. [0003] Saline-alkali soil has small porosity, low fertility, easy compaction, poor air permeabi...

AI Technical Summary

Problems solved by technology

But now most of the modifiers have not achieved the expected effect. At the same time, most of the powder or granular modifiers use phosphogypsum as raw material to provide sufficient soluble calcium for the soil, and replace the sodium ions in the colloidal complex, thereby reducing the amount of calcium in the soil. Alkalinity

However, for the saline-alkali soil in the north, it belongs to calcareous soil and is rich in calcium. Therefore, phosphogypsum is not suitable for soil improvement in these areas. At the same time, the amount of this amendment is large and the effect is slow

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