An efficient remediation method for continuous cropping obstacle soil

By using a synergistic system of hydrothermal fluid prepared from kitchen waste and plant carbon and nitrogen sources, the problems of high cost and incomplete effect in soil remediation under continuous cropping obstacles have been solved, and long-term remediation of soil for medicinal herb cultivation has been achieved in a low-temperature environment.

CN122164742APending Publication Date: 2026-06-09RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
Filing Date
2026-04-30
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies for repairing soils affected by continuous cropping obstacles suffer from high repair costs, inability to address soil nutrient depletion, incomplete repair in low-temperature regions, and easy recurrence of pathogens, making them unsuitable for the long-term repair needs of medicinal herb cultivation.

Method used

The hydrothermal fluid is prepared using kitchen waste. Through hydrothermal carbonization reaction, highly active organic carbon source and plant nitrogen source are generated. With a reasonable carbon-nitrogen ratio, a strong reducing environment is formed. Combined with membrane sealing technology, it can be maintained at an environment above 28℃ for more than 30 days to achieve soil remediation.

Benefits of technology

It effectively degrades phenolic acid allelochemicals, inactivates soil-borne pathogens, simultaneously replenishes nutrients, regulates soil acidification, optimizes microbial community structure, achieves long-term remediation effects, reduces remediation costs, and is suitable for the cultivation of Chinese medicinal herbs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides an efficient remediation method for continuous cropping obstacle soil, and belongs to the technical field of soil remediation.The method comprises the following steps: crushing kitchen garbage and mixing the kitchen garbage with water to obtain a mixed solution; under a closed condition at 180 DEG C to 240 DEG C, performing a hydrothermal carbonization reaction on the mixed solution, and then performing solid-liquid separation to obtain a hydrothermal solution; uniformly mixing a plant carbon source and a plant nitrogen source with the continuous cropping obstacle soil to be remediated, and then pouring the hydrothermal solution to form a mixed soil, wherein the addition amount of the hydrothermal solution is 0.1% to 0.5% of the dry weight of the soil to be remediated, the addition amount of the plant carbon source is 0.1% to 1.0% of the dry weight of the soil to be remediated, and the addition amount of the plant nitrogen source is 0.05% to 0.8% of the dry weight of the soil to be remediated; after the mixed soil is irrigated to saturation, the mixed soil is covered and sealed, and then kept in an environment above 28 DEG C for more than 30 days; after the film is removed, ventilation and airing are performed to complete soil remediation.The method can improve the reaction temperature of the soil to be remediated, degrades phenolic acid allelochemicals, inhibits harmful fungi, simultaneously fertilizes and adjusts the soil acidity, and improves the remediation effect of the continuous cropping obstacle soil.
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