中国草地学报2026，Vol.48Issue(6)：76-86,11.DOI:10.16742/j.zgcdxb.20260011
饲用燕麦养分吸收对农牧交错区土壤类型和水肥管理的响应
Response of Nutrient Uptake by Forage Oat(Avena sativa L.)to Soil Types and Water-Fertilizer Management in the Agro-Pastoral Ecotone of Northern China
摘要
Abstract
Oat(Avena sativa L.)is a major forage crops in the agro-pastoral ecotone of northern China.Its productivity is often co-limited by both water and nutrient availability,and the region is charac-terized by diverse soil types.However,the mechanisms underlying the interactive effects of soil type and water-fertilizer management on yield formation and nutrient uptake in oat remain poorly understood.Based on a soil translocation network experiment platform established across the agro-pastoral ecotone,this study investigated the effects of irrigation and fertilization on biomass and nitrogen(N)and phosphorus(P)uptake of oat grown in four typical soil types:chernozem,loessal soil,chestnut soil,and aeolian sandy soil.The results indicated that:(1)Irrigation or fertilization alone optimized aboveground biomass allocation,increased aboveground biomass,and thereby enhancing N and P uptake in oat.(2)Water-fertilizer coupling significantly increased stem and leaf biomass in all four soil types(P<0.05)and significantly increased N and P uptake in chernozem,loessal soil,and chestnut soil(P<0.05).(3)Structural equation modeling fur-ther revealed that water-fertilizer coupling enhanced the accumulation of stem and leaf biomass,which increased total aboveground biomass and consequently drove greater N and P uptake.Overall,soil type was a key factor determining oat responses to water and fertilizer management.Therefore,site-specific water and fertilizer based on soil properties and crop demands should be implemented to effectively improve oat productivity and water use efficiency in the agro-pastoral ecotone of northern China.关键词
饲用燕麦/氮、磷吸收/水肥管理/土壤类型/农牧交错区Key words
Avena sativa/Nitrogen and phosphorus uptake/Water and fertilizer management/Soil types/Agro-pastoral ecotone分类
农业科技引用本文复制引用
严佳乐,杨正荣,胡锦,石佳音,李斐,李西良..饲用燕麦养分吸收对农牧交错区土壤类型和水肥管理的响应[J].中国草地学报,2026,48(6):76-86,11.基金项目
国家重点研发计划(2023YFD130170103) （2023YFD130170103）
中国农业科学院青年创新专项(Y2022QC29) （Y2022QC29）
