免耕补播对退化草地植被-土壤-畜牧系统的协同调控效应

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中图分类号：S812 文献标识码：A 文章编号：1007-0435（2026）02-0653-10

Abstract：Grassanddegradation isoneof the major global ecologicalchallenges，especiallyin thearidandsemiaridareas of northwest China，where degraded grassland seriously afects the ecosystem functions and thedevelopment of animal husbandry. In this study，a four-year field experiment was conducted in Yuyang District， Shanxi Province，and systematically evaluated the effects of reseeding and modern intensive grazing techniques on degraded grassland productivity，vegetation community structure，soil physicochemical properties，and meat quality of sheep. The results showed that reseeding significantly enhanced grassland productivity，particularly by increasing the biomass proportion of legumes，which increased soil nitrogen content and improved vegetation nutritional quality. In addition，principal component analysis （PCA）revealed that reseeding restructured plant communities to include more plants with high nutrtional value.Grazing on reseeded grassland increased amino acid content in sheep meat and enhanced its flavor. In general，reseeding technology plays a pivotal role in restoring degraded grassland and advancing sustainable development of animal husbandry，offering a scientific foundation for grassland management in arid and semi-arid areas. Key words：Degraded grassland ;Reseeding;Productivity;Soil nutrients;Forage quality

草地生态系统是地球陆地生态系统的重要组成部分，不仅提供畜牧业生产所需的饲草资源，还具有维持生物多样性、调节水循环和碳储存等重要生态功能。（剩余17188字）