寒旱农业科学2026，Vol.5Issue(8)：760-764,5.DOI:10.3969/j.issn.2097-2172.2026.08.012
黄芪连作障碍形成机制和消减措施
Formation Mechanisms and Mitigation Measures of Continuous Cropping Obstacles in Astragalus membranaceus
摘要
Abstract
Continuous cropping obstacle has emerged as a critical issue constraining the sustainable development of the As-tragalus industry.Long-term monoculture leads to declines in soil nutrients such as organic matter,available phosphorus,and avail-able potassium,resulting in nutrient imbalance.The accumulation of autotoxic compounds,such as phenolic acids,significantly inhib-its the growth of Astragalus membranaceus and reduces root dry weight.Imbalance in the microbial community causes a decline in the abundance of beneficial microorganisms and enrichment of pathogens,leading to a marked increase in the incidence of root rot and se-verely compromising yield and quality.Based on the formation mechanisms of continuous cropping obstacles and literature analysis,targeted mitigation measures are proposed.Agronomically,rotation and intercropping can be adopted to reduce root disease incidence and increase the contents of active components such as astragaloside IV and calycosin-7-glucoside,as well as yield.Soil amendment with biochar can increase beneficial bacteria such as Sphingomonas and Pseudomonas,thereby optimizing microbial community struc-ture.Anaerobic soil disinfection can suppress disease and improve yield by eliminating pathogens.In terms of microbial regulation,compound microbial fertilizers containing Trichoderma harzianum and Bacillus subtilis exhibit growth-promoting and biocontrol func-tions,thereby enhancing disease resistance and yield in Astragalus.Moreover,the combination of anaerobic soil disinfection with mi-crobial fertilizers demonstrates synergistic effects.Additionally,breeding disease-resistant and high-quality varieties represents an-other crucial direction.Future efforts should focus on developing efficient microbial inoculants,investigating integrated management strategies,and advancing the selection of disease-resistant varieties.关键词
连作障碍/黄芪/土壤微生物/自毒物质/土壤性质Key words
Continuous cropping obstacle/Astragalus membranaceus/Soil microorganism/Autotoxin/Soil property分类
农业科技引用本文复制引用
史晓鹏,马宁,尚虎山..黄芪连作障碍形成机制和消减措施[J].寒旱农业科学,2026,5(8):760-764,5.基金项目
定西市科技计划(DX2024AZ07) （DX2024AZ07）
2025年定西市市级青年人才项目(定市组字[2025]17号). （定市组字[2025]17号）
