A kind of acidic soil improver and its preparation method and the method for improving acidic soil

Abstract

The invention discloses an acid soil modifier. The acid soil modifier is characterized in that the acid soil modifier is prepared from the following components in percentage by weight: (1) 45%-65% ofcoastal saline-alkali earth surface polysaline soil, the coastal saline-alkali earth surface polysaline soil is surface soil from the coastal saline-alkali earth surface to the depth of 5 cm, with thesalt content being 3%-50%, and pH value being 7.5-8.5; (2) 20%-30% of halophyte plant-charcoal, the halophyte plant-charcoal is a product of cracking halophyte after air drying at 300-700 DEG C; and(3) 15%-25% of conch powder. According to the acid soil modifier, the problem of soil acidification is combined with coastal saline-alkali land improvement and treatment and utilization of halophyte resources, through stripping of the coastal saline-alkali earth surface polysaline soil, the total salt content of surface soil of a coastal saline-alkali area can be effectively reduced, the lack of nutrient elements in acid soil can be supplemented by rich calcium, sodium, potassium and other elements in the coastal saline-alkali earth surface polysaline soil, common shells in a coastal area areused as raw materials, and limestone resource consumption in acid soil improvement is saved.

Description

technical field [0001] The invention relates to the field of soil improvement, in particular to an acidic soil improver and a preparation method thereof, and a method for improving acidic soil by using the acidic soil improver. Background technique [0002] Since the 1980s, many unfavorable factors such as excessive application of nitrogen fertilizers in the process of high-input intensive agricultural production, removal of straw and salt base have caused significant acidification of the main farmland soil in my country. Studies have shown that the pH value of some red soils in the south has dropped to between 3-4, resulting in a large reduction or even failure of crops such as corn and tobacco; the soil pH value of some vegetable greenhouses in the north has dropped from 7-8 to 4-5, and pests and diseases have appeared. Seriously, the quality and yield of vegetables have dropped significantly. [0003] On the other hand, the soil in coastal saline-alkaline areas is affect...

AI Technical Summary

Problems solved by technology

However, lime application can only improve soil acidity and increase Ca ion content, but cannot adjust the ion composition of the soil, and organic fertilizers often take effect slowly

[0006] Therefore, there are problems of improving coastal saline-alkali land and acidic soil simultaneously in the prior art, and there are also deficiencies in the improvement of acidic soil

Images