中国草地学报2025，Vol.47Issue(12)：77-86,10.DOI:10.16742/j.zgcdxb.20250112
不同根系构型植物补播对退化草地生产力及土壤理化性质的影响
Effects of Reseeding Plants with Different Root Architectures on the Productivity and Soil Physicochemical Properties of Degraded Grasslands
摘要
Abstract
The farming-pastoral zone of northern China serves as a critical ecological security barrier for central and eastern regions.However,the combined pressures of overgrazing and climate change have led to severe grassland degradation,resulting in substantial declines in vegetation productivity and soil quality.Reseeding is a widely adopted restoration strategy,yet its effectiveness varies among plant species,poten-tially due to differences in root system architectures on soil physicochemical properties.In this study,a degraded typical steppe was selected to examine the effects of reseeding plants with distinct root types,including taproot,tuberous root,and fibrous root systems,with non-reseeded plots as control.The impacts on grassland productivity and soil characteristics were comprehensively assessed.The results showed that alfalfa reseeding achieved the greatest productivity improvement,with aboveground biomass increasing by about 1.38 times compared to the control.Both oat and alfalfa reseeding treatments signifi-cantly enhanced soil quality.From the perspective of root architecture,fibrous rooted plants were the most effective in improving soil organic matter,porosity,moisture content,and aggregate stability.Tap rooted plants contributed to increases in surface soil organic matter,porosity and moisture content,whereas spe-cies with straight roots were effective in improving deep soil conditions.Overall,reseeding with fibrous rooted plants yields the most pronounced restoration benefits for degraded grasslands.These findings pro-vide a theoretical basis and practical guidance for optimizing plant selection in grassland rehabilitation based on root system architecture.关键词
退化草地/补播植物/根系构型/生物量/土壤理化性质Key words
Degraded grasslands/Reseeding plants/Root system architecture/Biomass/Soil physico-chemical properties分类
农业科技引用本文复制引用
LUAN Haoming,Hanggai,HUANG Ding..不同根系构型植物补播对退化草地生产力及土壤理化性质的影响[J].中国草地学报,2025,47(12):77-86,10.基金项目
财政部和农业农村部:国家现代农业产业技术体系项目(CARS-34) （CARS-34）
