草原生态恶化
degeneration of grassland ecosystem
草原生态环境
grassland ecological environment
草原生态环境保护
ecological and environmental protection
草原生态经济系统
Grassland ecological economic system
草原生态旅游资源
grassland ecotourism resource
草原生态系统
grassland ecological system
Grassland ecosystems
Grassland ecosystem
prairie ecosystem
草原生态修复
grassland ecological restoration
甘肃草原生态研究所
gansu grassland ecological institute
甘肃省草原生态研究所
gansu grassland ecological research institute
baffle-tube
高寒草原生态系统
Alpine grassland ecosystem
生态草原牧场
ecological pasturelands and farm
土壤有机、森林－草原生态系、δ13C值
13C value
forestgrassland ecosystem
Soil organic matter
温带榆树稀树草原生态系统
temperate Ulmus pumila sparse forest grassland eco