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Position: Home > Articles > Annual dynamics of productivity in rangeland across climatic factors over last 30 years in northern China Pratacultural Science 2016,33 (4) 739-747

中国北方草原生物量年际动态

作  者:
苟晓伟;常生华;程云湘;侯扶江
单  位:
草地农业生态系统国家重点实验室
关键词:
地上生物量;草地类型;气候变化;年降水;年均温
摘  要:
不同类型或同一类型不同区域的草地,其地上生物量在时间和空间上均存在差异,本文从不同的草地类型和时空尺度揭示植被生物量与环境因子间动态关系。结果显示,1)中国北方草原近30余年地上生物量总体呈下降趋势,水分条件较好的区域下降幅度较大,局部变化不显著,而近5年则呈持续增长趋势;2)时间序列上,年降水和年均温的交互作用对各区域草地地上生物量影响不显著;3)空间尺度上,温性草原年均温对地上生物量的影响较显著,高寒草原地上生物量的主要限制因子是降水。
译  名:
Annual dynamics of productivity in rangeland across climatic factors over last 30 years in northern China
作  者:
Gou Xiao-wei;Chang Sheng-hua;Cheng Yun-xiang;Hou Fu-jiang;State Key Laboratory of Grassland Agro-ecosystems,College of Pastoral Agriculture Science and Technology,Lanzhou University;
关键词:
aboveground biomass;;grassland type;;climate change;;annual precipitation;;annual temperature
摘  要:
Aboveground biomass in different rangeland types or same type in different regions varied with time and space which reveals the dynamic relationship between vegetation biomass and environmental factors from different rangeland types and spatial and temporal scales.The results showed that aboveground biomass in Chinese northern steppe rangeland general declined in last 30 years although consistent increased in the recent 5years.The decline was great in areas with better water conditions and was not significant in local scale.The interaction of annual temperature and precipitation did not have significant effects on aboveground biomass in time scale.The average annual temperature of temperate rangeland had significant effects on aboveground biomass in spatial scale.The precipitation is the main limiting factor of aboveground biomass in alpine rangeland.

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