江西农业大学学报2026，Vol.48Issue(3)：837-850,14.DOI:10.3724/aauj.2026069
湖南稷子田菁间混作对宁夏盐碱地土壤微生物群落多样性的影响
Effects of Echinochloa frumentacea-Sesbania cannabina intercropping and mixed cropping on soil microbial community diversity in saline-alkali land in Ningxia
摘要
Abstract
[Objective]Salinization is a major land problem in the world.The effects of the mixed action of millet and sesbania on soil microbial community and physical and chemical properties were explored in Ningxia Hui Autonomous Region,so as to provide theoretical basis for biological improvement of saline-alkali land.[Method]With monocropping(e)of Echinochloa frumentacea and monocropping(s)of Sesbania cannabina as control,intercropping(E ‖ S)and mixed cropping(E×S)were set up in Hunan.[Result]All the four planting methods can significantly reduce soil pH and total salt content(P<0.05),but the effects on soil nutrients are not significant(P>0.05).Microbial diversity analysis showed that the Faith's PD index of bacteria in mixed cropping was significantly higher than that of sesbania monoculture(P<0.05),while the Pielou_e and Chao 1 indexes of fungi in intercropping and mixed cropping were significantly lower than that of millet monoculture in Hunan(P<0.05).The analysis of community composition at phylum level showed that intercropping and mixed cropping significantly increased the relative abundance of Proteobacteria(increased by 2.13%-4.04%)and Ascomycetes(increased by 1.10%-4.27%)(P<0.05),while significantly decreasing the abundance of Basidiomycetes(decreased by 5.25%-5.92%)(P<0.05).Correlation analysis revealed that α diversity of bacteria was negatively correlated with total salt content(P<0.05),while α diversity of fungi was positively correlated with pH and total phosphorus content(P<0.05).Basidiomycetes were positively correlated with soil pH(P<0.05)and negatively correlated with total salt content(P<0.05).[Conclusion]Single cropping of millet has the lowest total salt content,and intercropping can effectively improve soil nutrients.Mixed cropping between millet and sesbania is a feasible strategy for biological improvement of saline-alkali land,which can significantly reduce soil pH,salt content,increase available phosphorus and potassium content,and improve soil ecological function by optimizing microbial community,providing theoretical support and technical reference for sustainable utilization of saline-alkali land.关键词
盐碱地/间作/混作/土壤理化性质/土壤微生物群落多样性Key words
saline-alkali land/intercropping/mixed sowing/soil physical and chemical properties/soil microbial community structure分类
农业科技引用本文复制引用
廖珍玮,马进燕,李磊,许兴..湖南稷子田菁间混作对宁夏盐碱地土壤微生物群落多样性的影响[J].江西农业大学学报,2026,48(3):837-850,14.基金项目
"十四五"国家重点研发计划项目(2021YFD1900600) Project supported by National Key Research and Development Program of China(2021YFD1900600) （2021YFD1900600）
