Method for remedying facility continuous cropping acidized soil through microorganism-electric combination

Abstract

The invention discloses a method for remedying facility continuous cropping acidized soil through microorganism-electric combination. The method includes the steps that two electrode baths are formed in the surface of the soil, a cathode and an anode are inserted in the electrode bathes respectively, alkali liquor is added to the baths, the pH value in the baths ranges from 11 to 12, and power is supplied for electric remediation; microorganisms ferment, fermentation liquid is acquired to be compounded with Ca(OH)2 and Mg(OH)2 to serve as functional microorganism bacterial liquid; the functional microorganism bacterial liquid is inoculated into the soil anode bath in the electric remediation process, and the pH value is adjusted to an initial value; and under the effects of functional microorganisms and electric power, acid-based ions in the soil are separated from the soil and migrated to the anode and the cathode, and therefore soil remediation is finished. The microorganisms are used for acting on the soil, and soil nutrient ions are activated; an electric remediation method is used for removing redundant NO3- and K+ in the soil, the content of base-based ions such as OH-, Ca2+ and Mg2+ in the soil is increased, and finally the pH value of the facility continuous cropping acidized soil is increased. The method is easy to implement, secondary pollution cannot be generated, and the microorganism activity of the soil and the quality of the soil can be improved.

Description

technical field [0001] The invention relates to soil restoration technology, in particular to a method for continuous cropping and acidifying soil of a microbial-electric combined restoration facility. Background technique [0002] In my country, due to the excessive application of chemical acidic fertilizers such as N fertilizer, the problem of soil acidification in facility continuous cropping has become increasingly prominent, resulting in a decrease in vegetable yield and quality deterioration, which seriously restricts the sustainable use of facility soil. How to solve the problem of soil acidification in facility continuous cropping has become a problem of great concern to the current society. Research at home and abroad shows that the pH value of facility continuous cropping soil shows a downward trend year by year with the increase of facility planting years, and greenhouses with soil pH<6.5 account for more than 70% of the total number of investigations, and some...

AI Technical Summary

Problems solved by technology

Applying lime can directly neutralize soil acidity, but long-term or large-scale use of lime will cause soil compaction and imbalance of soil nutrient elements

Microbial amendments can activate soil nutrients, promote the release of nutrient ions, increase soil organic matter and minerals, improve soil buffer performance, and then improve soil acidity and alkalinity, but it often takes several years to see results

Electric remediation is currently mainly used in the remediation of heavy metal-contaminated soil, such as the patent "Electric Remediation Method and Device for Heavy Metal Contaminated Soil (CN103736718A)", but there is no report on the application of facility continuous cropping acidified soil

Images