| Irrigation depth far exceeds water uptake depth in an oasis cropland in the middle reaches of Heihe River Basin | |
| Yang B.; Wen, X. F.; Sun, X. M. | |
| 2015 | |
| 关键词 | stable-isotope analysis mixing models soil-water northwestern china deep-percolation midwestern us zhangye basin in-depth hydrogen plant |
| 英文摘要 | Agricultural irrigation in the middle reaches of the Heihe River Basin consumes approximately 80% of the total river water. Whether the irrigation depth matches the water uptake depth of crops is one of the most important factors affecting the efficiency of irrigation water use. Our results indicated that the influence of plastic film on soil water delta O-18 was restricted to 0-30 cm soil depth. Based on a Bayesian model (MixSIR), we found that irrigated maize acquired water preferentially from 0-10 cm soil layer, with a median uptake proportion of 87 +/- 15%. Additionally, maize utilised a mixture of irrigation and shallow soil water instead of absorbing the irrigation water directly. However, only 24.7 +/- 5.5% of irrigation water remained in 0-10 cm soil layer, whereas 29.5 +/- 2.8% and 38.4 +/- 3.3% of the irrigation water infiltrated into 10-40 cm and 40-80 cm layers. During the 4 irrigation events, approximately 39% of the irrigation and rainwater infiltrated into soil layers below 80 cm. Reducing irrigation amount and developing water-saving irrigation methods will be important strategies for improving the efficiency of irrigation water use in this area. |
| 出处 | Scientific Reports |
| 卷 | 5 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 2045-2322 |
| 内容类型 | SCI/SSCI论文 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38508]  |
| 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 | Yang B.,Wen, X. F.,Sun, X. M.. Irrigation depth far exceeds water uptake depth in an oasis cropland in the middle reaches of Heihe River Basin. 2015. |
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