西南农业学报2025，Vol.38Issue(8)：1586-1594,9.DOI:10.16213/j.cnki.scjas.2025.8.003
淀粉基保水剂施用对芒果园土壤理化性质及细菌群落结构的影响
Effects of starch-based super absorbent polymer application on physicochemical properties and bacterial community structure of soil in mango orchards
摘要
Abstract
[Objective]The present paper aimed to clarify the regulatory mechanism of starch-based super absorbent polymer(SAP)on soil physicochemical properties and bacterial community structure in different soil layers of mango orchards,to provide a theoretical basis for soil health management in arid regions.[Method]A typical mango orchard in Panzhihua,Sichuan province,was selected as the research object.Two soil layers,namely the surface layer(0-20 cm)and the subsurface layer(20-40 cm),were established to systematically analyze the effects of starch-based water-retaining agent application on soil physicochemical properties,bacterial community diversity and structure.[Re-sult]Soil depth,rather than SAP treatment,was the primary factor influencing soil physicochemical properties and bacterial community struc-ture.However,SAP primarily affected the properties of the surface soil,significantly increasing ammonium nitrogen content,microbial bio-mass carbon-to-nitrogen utilization efficiency(MBC/MBN),and the ratio of carbon-to-nitrogen metabolic efficiency(CUE∶NUE)in the surface soil,but exhibited a certain inhibitory effect on bacterial community diversity.Regarding bacterial community structure,SAP mainly functioned by increasing the relative abundance of γ-Proteobacteria and Actinobacteria while decreasing the relative abundance of Chloroflexi and Planctomycetes.Differential OTU analysis further confirmed that SAP had a more significant regulatory effect on the microbial community in the surface soil,mainly impacting microbial groups related to carbon and nitrogen metabolism.Redundancy analysis results showed that to-tal nitrogen,total carbon,ammonium nitrogen content,and microbial carbon-to-nitrogen ratio were the key environmental factors driving bac-terial community assembly.[Conclusion]By influencing soil nutrient status,SAP achieves differentiated microbial regulation in different soil layers,thereby regulating soil ecological processes.The study provides a scientific basis for orchard microenvironment optimization and soil health management in arid regions.关键词
保水剂/土壤理化性质/细菌群落/冗余分析Key words
Super absorbent polymer(SAP)/Soil physicochemical properties/Bacterial community structure/Redundancy analysis分类
农业科技引用本文复制引用
刘颖,魏敏,袁婷,耿丹丹,孙玉明,石治强,郑盛华,刘定辉..淀粉基保水剂施用对芒果园土壤理化性质及细菌群落结构的影响[J].西南农业学报,2025,38(8):1586-1594,9.基金项目
四川省农业科学院"1+9"揭榜挂帅科技攻关项目(1+9KJGG005) （1+9KJGG005）
成都市重点研发支撑计划目标(2023-YF09-00034-SN) （2023-YF09-00034-SN）
