Assessment of secondary soil salinity prevention and economic benefit under different drip line placement and irrigation regime in northwest China
文献类型：SCI/SSCI论文
| 作者 | Wang R. S. ; Wan S. Q. ; Kang Y. H. ; Dou C. Y. |
| 发表日期 | 2014 |
| 关键词 | Drip irrigation Salt accumulation Net return Arid region Irrigation water use efficiency water-use efficiency cotton growth yield potato corn dynamics plain l. |
| 英文摘要 | This study was conducted in order to evaluate the prevention of secondary soil salinity and the economic benefits of different drip line designs and irrigation regimes in northwest China. A three-year experiment (2008-2010) was carried out in the Xinjiang Autonomous Region of China and included five water treatments and two drip line designs. Irrigation was triggered by the soil manic potential (SMP) threshold at 20-cm soil depth, at -10, -20. -30, -40 and -50 kPa for single and double lateral irrigation placements after cotton was established. Soil salinity was significantly affected by the irrigation regime and drip line design. The single line design was more efficient at salt leaching and the areas of low electrical conductivity zones in the soil profile existing throughout the growth season were directly proportional to the SMP threshold. Moreover, the critical SMP value (CSV), which is the lowest SMP threshold that can prevent salinization of soil, was significantly related to soil depth and drip line placement. The lowest CSV of -43 kPa was obtained under single line design within the 0-40 cm soil depth interval. Seed cotton yields were positively correlated with the SMP thresholds and planting years; and the highest yield of 6.41 Mg/ha was achieved under the double lateral design for SMP of -20 kPa in 2010. Economic evaluation showed that total investment cost was around 10% lower for single compared to double lateral design, whereas double laterals produced more net income. From the combined point of economic return and soil salinization prevention, a SMP threshold of -20 kPa with double line design was found to be most appropriate for scheduling of cotton drip irrigation and agronomic practices in Xinjiang. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved. |
| 出处 | Agricultural Water Management |
| 卷 | 131 |
| 页 | 41-49 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0378-3774 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29541]  |
| 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 | Wang R. S.,Wan S. Q.,Kang Y. H.,et al. Assessment of secondary soil salinity prevention and economic benefit under different drip line placement and irrigation regime in northwest China. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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