Preparation method of high-efficiency acidic soil improving agent

Abstract

The invention discloses a preparation method of a high-efficiency acidic soil improving agent. The preparation method comprises the following steps: (1) adding silica gel solid particles into activateliquid to obtain activated silica gel; (2) adding deionized water after mixing the activated silica gel with polyethylenimine, heating and performing insulation treatment on the mixture, filtering toobtain filter residue, and washing and drying the filter residue with water to obtain modified silica gel; (3) uniformly mixing the modified silica gel, bamboo charcoal powder, zeolite and cinnamon skin to produce the high-efficiency acidic soil improving agent. The acidic soil improving agent prepared by the invention can effectively neutralize acidic hydrogen ions in soil, can effectively adsorb heavy metal ions in the soil, has strong adsorption capacity, does not cause heavy metal ions to re-precipitate, can be applied with a fertilizer simultaneously, and can improve the sustained release effect of the fertilizer to a certain extent, and further improve the effect of fertilization.

Description

technical field [0001] The invention belongs to the technical field of soil conditioner preparation, and in particular relates to a preparation method of a high-efficiency acidic soil conditioner. Background technique [0002] Soil acidification refers to the phenomenon that the base ions in the soil are leached and the hydrogen ions increase, which makes the soil acidity change from low to high. This is a process of natural development of soil. This process is generally very slow, but in recent years, human factors have greatly accelerated the process of soil acidification. Acid deposition and extensive use of acidic fertilizers are the main causes of soil acidification. In southern China, soil acidification is one of the main factors that limit agricultural production and affect environmental quality. Low soil pH will affect the physical and chemical properties of the soil, thus indirectly affecting the growth and development of plants. Soil overacidity leads to soil co...

AI Technical Summary

Problems solved by technology

Soil overacidity leads to soil compaction, heavy texture, soil structure damage, and poor air permeability. After soil acidification, soil biodiversity is changed, the availability of nutrients in the soil is reduced, and cations are lost, making phosphorus, potassium, and calcium , magnesium, molybdenum, boron and other nutrient elements are deficient, resulting in imbalance of soil nutrients and decreased fertility

Moreover, the decrease of soil pH value will activate toxic heavy metal elements and poison crops, resulting in poor growth and development of crops, reduced crop yield and product quality decline, while increasing the potential threat of heavy metal elements to agricultural production and ecological environment

In the prior art, although there are a variety of acidic soil improvers, the improvement effect is poor, and the application amount is relatively large. When applied together with chemical fertilizers, the fertilizer efficiency will be reduced.