草业科学2018，Vol.35Issue(5)：941-948,8.DOI:10.11829/j.issn.1001-0629.2017-0363
玛曲高寒草甸放牧强度的遥感监测
Monitoring of grazing intensity in Maqu alpine meadow by remote sensing
摘要
Abstract
To provide a scientific basis for the sustainable utilization of grassland resources and grass-livestock balance in the Maqu alpine meadow,this study used remote sensing technology combined with field-measured data and MODIS image data in the same period in 2016.Regression models of aboveground biomass and vegeta-tion index(NDVI)with relative grazing intensity were established individually in the study area,and a power regression model between different relative grazing intensities and NDVI was additionally established.The re-sult showed that with increase in NDVI,aboveground biomass increased in June,July,August,and Septem-ber.Ground biomass and relative grazing intensity showed optimum significant negative correlation(R2=0.9 6 5 1),which was a power curvilinear regression.Relative grazing intensity and vegetation index showed good correlation(R2=0.631);with decrease in NDVI,relative grazing intensity increased gradually.When rel-ative grazing intensity increased to a certain extent,NDVI was not sensitive to its response.关键词
高寒草甸/地上生物量/植被指数/相对放牧强度/草—畜平衡/放牧强度阈值/遥感Key words
alpine meadow/aboveground biomass/vegetation index/relative grazing intensity/forage-livestock balance/grazing intensity threshold/remote sensing分类
农业科技引用本文复制引用
马青青,柴林荣,马海玲,常生华,程云湘..玛曲高寒草甸放牧强度的遥感监测[J].草业科学,2018,35(5):941-948,8.基金项目
国家重点研发计划项目(2016YFC0501904-02) （2016YFC0501904-02）
国家自然科学基金青年项目(31402118) （31402118）
甘肃省退牧还草科技支撑(GH2016-TM-HC001) （GH2016-TM-HC001）
兰州大学中央高校基本科研业务费专项资金(lzujbky-2015-251) （lzujbky-2015-251）
