灌溉排水学报2025，Vol.44Issue(5)：83-91,9.DOI:10.13522/j.cnki.ggps.2024380
中国西北旱区砂田表层土壤微生物活性对连作响应的整合分析
Impact of continuous cropping on microbial biomass and enzyme activities in the surface layer of gravel-sand mulched soils in arid Northwest China:A Meta-analysis
摘要
Abstract
[Objective]Soil microorganisms and enzymes play crucial roles in nutrient cycling and maintaining soil health,and their activities are influenced by various abiotic and biotic factors.This study uses meta-analysis to investigates the impact of long-term continuous cropping on microbial biomass and enzyme activities in the surface layer of gravel-sand mulched soils in arid regions of Northwestern China.[Method]Microbial indicators extracted from the literature included total bacterial count(TBC),total fungal count(TFC),total actinomycetes count(TAC),total microbial count(TMC),the bacteria-to-fungi ratio(TBC∶TFC),microbial biomass carbon(MBC),microbial biomass nitrogen(MBN),and the MBC∶MBN ratio.Enzymatic indicators extracted from the literature were activities of catalase(CAT),urease(URE),phosphatase(PHO),and sucrase(SUR).Fields mulched with gravel for 1-3 years served as the control(CK).Pearson correlation analysis was used to examine the relationships between microbial activity and soil nutrient factors such as soil organic matter(SOM),total nitrogen(TN),total phosphorus(TP),available nitrogen(AN),available phosphorus(AP),and available potassium(AK).[Result]Compared to the control,long-term continuous cropping(4-15 years)significantly(P＜0.05)reduced TBC,TFC,TAC,TMC,TBC∶TFC,MBC,MBN,MBC∶MBN,and the activities of URE,PHO,and SUR by 39.35%,12.99%,58.34%,42.13%,30.11%,56.43%,25.45%,32.75%,40.77%,18.42%,and 32.89%,respectively.These negative effects intensified with increasing cropping duration.In contrast,continuous cropping increased CAT activity by an average of 1.27%(P＜0.05),likely due to the changes in soil nutrients.[Conclusion]Continuous cropping for 4-6 years significantly affects topsoil microbial activity in gravel-sand mulched fields,leading to early signs of soil degradation.These findings highlight the need for optimized cropping strategies and improving soil management to sustain microbial function and soil fertility in arid and semi-arid agricultural systems in Northwestern China.关键词
砂田/连作/土壤微生物活性/退化/中国西北旱区/整合分析Key words
gravel-sand mulched field/continuous cropping/soil microbial activity/degradation/arid regions of Northwest China/Meta-analysis分类
农业科学引用本文复制引用
薛银民,贾振江,马东祥,吴洋洋,黄亚浩,何学忠,武秀,李王成..中国西北旱区砂田表层土壤微生物活性对连作响应的整合分析[J].灌溉排水学报,2025,44(5):83-91,9.基金项目
国家自然科学基金项目(52169010) （52169010）
国家重点研发计划项目(2021YFD1900600) （2021YFD1900600）
宁夏自然科学基金重点项目(2021AAC02008) （2021AAC02008）
宁夏重点研发计划项目(2019BEH03010) （2019BEH03010）
清华大学-宁夏银川水联网数字治水联合研究院项目(sklhse-2023-Iow013) （sklhse-2023-Iow013）
宁夏高等学校一流学科建设项目(NXYLXK2021A03) （NXYLXK2021A03）
