Irrigation strategies to improve the water use efficiency of wheat-maize double cropping systems in North China Plain
文献类型：SCI/SSCI论文
| 作者 | Ma L.; Ma L.; Yu Q. |
| 发表日期 | 2010 |
| 关键词 | RZWQM DSSAT Irrigation management Agricultural system models Water use efficiency winter-wheat nitrogen rzwqm yield model management growth |
| 英文摘要 | Water is the most important limiting factor of wheat (Triticum aestivum L.) and maize (Zea mays L.) double cropping systems in the North China Plain (NCP). A two-year experiment with four irrigation levels based on crop growth stages was used to calibrate and validate RZWQM2, a hybrid model that combines the Root Zone Water Quality Model (RZWQM) and DSSAT4.0. The calibrated model was then used to investigate various irrigation strategies for high yield and water use efficiency (WUE) using weather data from 1961 to 1999. The model simulated soil moisture, crop yield, above-ground biomass and WUE in responses to irrigation schedules well, with root mean square errors (RMSEs) of 0.029 cm(3) cm(-3), 0.59 Mg ha(-1), 2.05 Mg ha(-1), and 0.19 kg m(-3), respectively, for wheat; and 0.027 cm(3) cm(-3), 0.71 Mg ha(-1), 1.51 Mg ha(-1) and 0.35 kg m(-3), respectively, for maize. WUE increased with the amount of irrigation applied during the dry growing season of 2001-2002, but was less sensitive to irrigation during the wet season of 2002-2003. Long-term simulation using weather data from 1961 to 1999 showed that initial soil water at planting was adequate (at 82% of crop available water) for wheat establishment due to the high rainfall during the previous maize season. Preseason irrigation for wheat commonly practiced by local farmers should be postponed to the most sensitive growth stage (stem extension) for higher yield and WUE in the area. Preseason irrigation for maize is needed in 40% of the years. With limited irrigation available (100, 150, 200, or 250 mm per year), 80% of the water allocated to the critical wheat growth stages and 20% applied at maize planting achieved the highest WUE and the least water drainage overall for the two crops. Published by Elsevier B.V. |
| 出处 | Agricultural Water Management |
| 卷 | 97 |
| 期 | 8 |
| 页 | 1165-1174 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0378-3774 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/24049]  |
| 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 | Ma L.,Ma L.,Yu Q.. Irrigation strategies to improve the water use efficiency of wheat-maize double cropping systems in North China Plain. 2010. |
入库方式： OAI收割
来源：地理科学与资源研究所
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