华中农业大学学报2025，Vol.44Issue(3)：74-83,10.DOI:10.13300/j.cnki.hnlkxb.2025.03.009
克氏原螯虾对稻田土壤微生物多样性和碳固存的影响
Effects of crayfish on microbial diversity and carbon sequestration in paddy soil
摘要
Abstract
A field-based comparative experiment between rice monoculture(RM)and rice-crayfish-farming models(RC)was conducted to study the effects of introducing crayfish(Procambarus clarkii)into paddy fields on the microbial diversity and the carbon sequestration in soil.The impacts of different rice culti-vation models on the diversity and stability of microbial community,and the fractions of organic carbon in the topsoil(0-20 cm)and subsoil(20-40 cm)were investigated.The results showed that the content of or-ganic carbon in topsoil under the RC was 7.3%higher than that under RM,with a significant increase of 35.8%in the content of organic carbon in subsoil.The diversity of fungal community in the subsoil signifi-cantly decreased,with a decrease in the index of Chao1,Richness,and ACE indexes of 6.9%,7.2%,and 8.7%,respectively,while there was no significant effect on the diversity of microbial community in the top-soil.The RC significantly enhanced the network size,connectivity,and average degree of co-occurrence net-works for bacteria and fungi in both topsoil and subsoil,thereby improving the stability of network.It is indi-cated that the RC significantly increases the accumulation of organic carbon and the stability of microbial community in subsoil,promoting the biological fertility in paddy soil.关键词
稻-虾种养模式/土壤有机碳/土壤微生物/土壤生物肥力Key words
rice-crayfish farming models(RC)/organic carbon in soil/microbes in soil/biological fer-tility in soil分类
农业科技引用本文复制引用
张万洋,马天桥,汪金平,顾泽茂,李小坤..克氏原螯虾对稻田土壤微生物多样性和碳固存的影响[J].华中农业大学学报,2025,44(3):74-83,10.基金项目
湖北洪山实验室重大项目(2021HSZD002) （2021HSZD002）
国家重点研发计划项目(2022YFD2400700) （2022YFD2400700）
