中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Influence of Land Use Patterns on Evapotranspiration and Its Components in a Temperate Grassland Ecosystem

文献类型:SCI/SSCI论文

作者Li Y. Z.; Fan, J. W.; Hu, Z. M.; Shao, Q. Q.; Zhang, L. X.; Yu, H. L.
发表日期2015
关键词water-use efficiency rain-use efficiency carbon-dioxide exchange chihuahuan desert semiarid steppe energy-balance soil precipitation vegetation responses
英文摘要To better understand variation in response of components of ecosystem evapotranspiration (ET) to grassland use differences, we selected three typical land use patterns in a temperate steppe area: grazed steppe (G), steppe with grazers excluded (GE), and steppe cultivated to cropland (C). ET was divided into its components evaporation (E) and canopy transpiration (T) using herbicide and a chamber attached to a portable infrared gas analyzer (Li-6400). The results indicated that daily water consumption by ET in G was 3.30 kgm(-2) d(-1); compared with G, ET increased significantly in GE at 13.4% and showed a trend of 6.73% increase in C. Daily water consumption by E increased 24.3% in GE relative to G, and C showed 20.2% more than GE. At 0.46, E/ET in C was significantly higher than G at 0.35. Air temperature and the vapor pressure deficit were closely correlated with variation in diurnal ET, E, and T. The leaf area index (LAI) was also positively correlated with daily ET and E varied among grassland use patterns and explained variation in E/ET (81%). Thus, variation in LAI strongly influences the overall magnitude of ecosystem ET and the composition of its components under different grassland use patterns.
出处Advances in Meteorology
收录类别SCI
语种英语
ISSN号1687-9309
源URL[http://ir.igsnrr.ac.cn/handle/311030/38708]  
专题地理科学与资源研究所_历年回溯文献
推荐引用方式
GB/T 7714
Li Y. Z.,Fan, J. W.,Hu, Z. M.,et al. Influence of Land Use Patterns on Evapotranspiration and Its Components in a Temperate Grassland Ecosystem. 2015.

入库方式: OAI收割

来源:地理科学与资源研究所

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