Photosynthesis and soil respiration from a mixed‐grass prairie: effects of grazing and drought

摘要：

Current objectives of rangeland management include not only concerns of forage production, but also for environmental impacts.The effects of animal grazing on the physiology of rangeland plants have been studied at different spatial‐temporal scales and have varied results.In leaf‐level studies, it is not easy to account for the spatial‐temporal heterogeneity of main ecophysiological parameters.In farm‐level studies, it is not easy to manipulate key environmental drivers (such as drought or temperature).We conducted a field‐plot scale study of photosynthesis and respiration of a rangeland considering the effects of both cattle grazing and drought.

关键词： rangelands field plots measurement net ecosystem CO２ exchange daily rate

作者: Xuejun Dong Paul Nyren Bob Patton Guojie Wang Brian Kreft Anne Nyren Ryan Limb Don Kirby Larry Cihacek

作者单位: North Dakota State University,Central Grasslands Research Center,4824 48th A V E SE,Streeter,ND 5848 North Dakota State University,Dept.of Animal & Range Science,Fargo,ND 58105 USA North Dakota State University,Dept.of Soil Science,Fargo,ND 58105 USA.

会议类型: 国际会议

会议名称: 2008世界草地与草原大会

会议地点: 呼和浩特

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）