草业学报2013，Vol.22Issue(4)：247-256,10.DOI:10.11686/cyxb20130430
青海省草原鼠害区域草地生物量及盖度动态监测研究
Dynamic monitoring of biomass and vegetation coverage in rodent damaged grassland regions of Qinghai Province, China
摘要
Abstract
Combining Terra/MODIS vegetation index products MOD13A3 and field surveying data from 2005-2006,remote sensing inversion models of grassland aboveground biomass (GAB) and vegetation coverage (VC) in Qinghai Province were established.They were used to separately simulate and analyze the monthly and annual dynamic changes of biomass and vegetation coverage during 2001-2010 in rodent infested regions,harmful regions and rodent-free regions in the study area.Rodents had a significant influence on grassland productivity in the study area.1) An exponential model of MODIS-EVI (enhanced vegetation index) and a logarithmic model were the optimal models to estimate the green yield of GAB and VC,respectively and had a precision of 70.18％ and 77.43％,respectively.2) The GAB and VC for different types of grasslands in the study area decreased with the aggravation of rodent pests,especially in July and August of each year,and this tendency remained stable during the whole study period.关键词
鼠害/MODIS/植被指数/青海省Key words
rodent pest / MODIS/ vegetation index/ Qinghai Province分类
农业科技引用本文复制引用
陈梦蝶,黄晓东,侯秀敏,冯琦胜,于惠,郭正刚,梁天刚..青海省草原鼠害区域草地生物量及盖度动态监测研究[J].草业学报,2013,22(4):247-256,10.基金项目
国家自然科学基金项目(31172258)和教育部科技创新工程重大项目培育资金项目(708089)资助. （31172258）
