Energy fluxes and the Priestley-Taylor parameter over winter wheat and maize in the North China Plain
文献类型：SCI/SSCI论文
| 作者 | Yu Q. |
| 发表日期 | 2004 |
| 关键词 | surface energy fluxes Priestley-Taylor parameter soil moisture winter wheat maize North China Plain (NCP) soil-water regimes evaporative fraction canopy conductance penman-monteith surface evapotranspiration balance alpha |
| 英文摘要 | Surface energy fluxes above the canopies of well-irrigated winter wheat and maize in the North China Plain were measured by the Bowen-ratio energy balance technique in 1999-2000. Seasonal variation of the ratio of latent heat flux lambdaE to available energy R-n - G showed that the ratio of lambdaE to R-n - G exceeded 83% when leaf area index (LAI) varied from 2.0 to 6.0. The seasonal trend of evaporative fraction (EF) for winter wheat was similar to that of LAI before senescence stage, which is a critical factor controlling EF, which itself reflects the partitioning of available energy into lambdaE. The Priestley-Taylor parameter alpha over the wheat and maize canopies changed greatly over the course of a growing season, and the seasonal average alpha of winter wheat was 1.17 and 1.26, and that of maize was 1.06 and 1.09 in the two consecutive years. alpha for winter wheat was exponentially correlated to 0-20 cm surface soil moisture, but not for maize and with the increase of soil depths, the correlation between alpha and soil moisture was weak. Under different soil moisture conditions, a linear correlation between extractable soil water and leaf water potential psi for winter wheat was found. Copyright (C) 2004 John Wiley Sons, Ltd. |
| 出处 | Hydrological Processes |
| 卷 | 18 |
| 期 | 12 |
| 页 | 2235-2246 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0885-6087 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22318]  |
| 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 | Yu Q.. Energy fluxes and the Priestley-Taylor parameter over winter wheat and maize in the North China Plain. 2004. |
入库方式： OAI收割
来源：地理科学与资源研究所
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