退牧还草工程对环县草地恢复效果的影响  

Impacts of Returning Grazing to Grassland Program on Grassland Restoration Effects in Huanxian

作　　者：魏国林 宋苗苗 WEI Guolin;SONG Miaomiao(Huanxian Natural Resources Bureau of Qingyang City in Gansu Province,Qingyang Gansu 745000,China)

机构地区：[1]甘肃省庆阳市环县自然资源局,甘肃庆阳745000

出　　处：《甘肃林业科技》2024年第4期72-76,89,共6页Journal of Gansu Forestry Science and Technology

基　　金：甘肃省林业和草原自列科技项目(2022kj053)资助。

摘　　要：退牧还草对于保护草地生态环境、促进草原畜牧业可持续发展等具有重要意义。本研究以环县2017、2019、2021和2023年退牧还草工程区内和区外的天然草地为研究对象,通过对草地植被生长状况以及土壤养分变化的观测分析,探究退牧还草工程对环县草地恢复效果的影响。结果表明:环县草地实施退牧还草工程后,区内植被盖度、干草产量,以及表层土壤有机碳、氮磷含量均高于区外,与工程区外相比较,2017、2019、2021和2023年区内草地植被盖度分别增加了6.3%、7.6%、8.5%和7.4%,干草产量分别增加了12.0%、20.4%、13.3%和26.5%,0~15 cm深度土壤有机碳含量分别增加了12.7%、29.2%、14.5%和13.2%,土壤总氮和总磷含量分别增加了26.1%和22.7%、12.3%和14.8%、13.0%和16.7%、11.7%和18.2%。由此可见,退牧还草工程使环县草地的质量明显改善,草地生态恢复效果良好。Returning grazing to grassland plays a great significance for protecting the grassland ecological environment and promoting the sustainable development of grassland animal husbandry.This study areas located at the natural grasslands within and outside the Huanxian,which initially returning grazing to grassland in 2017,2019,2021,and 2023.Through observing the growth status of grassland vegetation and changes in soil nutrients,explore the effect of returning grazing to grassland program on grassland restoration in Huanxian.The results showed that after implementing the program of returning grazing to grassland in Huanxian,the vegetation coverage,plant height,density,grass yield,as well as the content of organic carbon,nitrogen and phosphorus in the surface soil were all higher than those outside the program area.Compared with the outside of the program area,the vegetation coverage of grasslands in the program area increased by 6.3%,7.6%,8.5%,and 7.4%respectively;the hay yield increased by 12.0%,20.4%,13.3%,and 26.5%respectively;the soil organic carbon content in the 0~15 cm depth increased by 12.7%,29.2%,14.5%,and 13.2%separately;the total nitrogen and phosphorus contents in the soil increased by 26.1%and 22.7%,12.3%and 14.8%,13.0%and 16.7%,11.7%,and 18.2%respectively in 2017,2019,2021,and 2023.The above research indicates that the program of returning farmland to grassland has significantly improved the quality of grasslands in Huanxian,and has effective ecological restoration effects to grasslands.

关 键 词：退牧还草工程 环县 草地恢复效果 

分 类 号：S812[农业科学—草业科学]