生草覆盖对有机弼猴桃园土壤有机碳组分和微生物群落特征的影响

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中图分类号：S153.6 文献标识码：A 文章编号：1007-0435（2025）07-2162-10

引用格式：，等.生草覆盖对有机猕猴桃园土壤有机碳组分和微生物群落特征的影响[J].草地学报， 2025，33（7） ：2162—2171 CAI Ming-ming，CHEN Hui-min，WANG Xiao-tie，et al. Efects of Cover Crops on Soil Organic Carbon and Micro bialCommunity CharacteristicsofOrganic Kiwifruit Orchards inGuanzhong Region[J].ActaAgrestia Sinica，2025，33 （7）：2162-2171

Effects of Cover Crops on Soil Organic Carbon and Microbial Community Characteristics of Organic Kiwifruit Orchards in Guanzhong Region

CAI Ming-ming1， CHEN Hui-min1， WANG Xiao-tie²， TAN Hua1， CHEN Jia-xuan1，LONG Ming-xiul* （1.College of Grassand Agriculture，Northwest A&F Universty，Yangling，ShaanxiProvince 7121oo，China; 2.Baiheng Organic KiwiOrchards Co.，Ltd.，Yangling，Shaanxi Province 712loo，China）

Abstract：To further evaluate the effects ofcover crops on soil organic carbon fractions and microbial community structure in organic kiwifruit orchards（Actinidia chinensis），a field experiment was conducted at an orchard from 202O to 2O23 in Baiheng，Yangling，Shaanxi Province，China. Whiteclover（Trifolium repens） was sown as the cover crop，and clean tilage（CT）was served as the control. Soil organic carbon fractions，microbial residue carbon，and microbial community structure were analyzed in the 0-20cm soil layer under three-year-old inter-row areas of white clover.The results showed that cover crop significantly increased soil microbial biomass carbon，microbial biomass nitrogen， β -1，4-glucosidase，and β-1，4 -xylosidase activities（ P<0.05 ，while sig nificantly decreased dissolved organic carbon content by 25.87% （ P<0.01 . The evenness and diversity of soil bacteria significantly reduced （ P<0.05） ，leading to an increase in negative competitive relationships among bacterial species.There was a significant positive correlation between soil organic carbon，microbial residue carbon， and aggregate stability （P<0.05） .In conclusion，the use of white clover as a cover crop in organic kiwifruit orchards in the Guanzhong region not only enhanced the content of surface soil organic carbon fractions and carbon-cycling enzyme activities，but also promoteds soil carbon cycling and the stability of organic mater by optimizing the ecological structure and functional capacity of the soil microbial community.

Keywords：Soil organic carbon;Microbial necromass carbon;Soil microbialcommunity;Cover crops in orchard

我国是世界弼猴桃第一生产大国，弼猴桃也是陕西省仅次于苹果产业的第二大特色支柱产业，在促进当地农户增收致富、助力中国乡村振兴发展中发挥着巨大作用。（剩余16250字）