摘要
在对水稻生产模型ORYZA2000充分验证的基础上,以2003年湖北团林水肥耦合试验设计为背景,应用ORYZA2000模拟分析了不同施肥条件下传统淹灌和3种节水灌溉方式下的稻田田间水量平衡要素、产量以及水分生产率。结果表明,节水灌溉方式灌水量大大低于传统淹灌,其中无水层灌溉节水效果又明显优于沟灌,可靠性高;雨养灌溉虽然能最大限度的节约灌溉水量,但其应用取决于区域气候特点,应结合气候预测应用。水分胁迫可以增大不同施氮水平下稻田腾发量的差异,施氮可以减少株间蒸发,增加作物蒸腾,从而增加稻田腾发量和产量。
On the basis of extensive calibration and evaluation of lowland rice growth model ORYZA2000, and with the background of waternitrogen coupling interaction experiment design in 2003, in Tuanlin Experiment Station, Hubei Province, the paper analyzed water balance elements, yield, and water productivity under traditional continuous flooding irrigation condition and three kinds of water-saving irrigation conditions, totally 8 nitrogen water treatments, with simulation by ORYZA2000. We concluded that water-saving irrigation methods could significantly save irrigation water compared with the traditional continuous flooding irrigation. Among the water-saving irrigation techniques, Flushing Irrigation （FI） has a better water-saving effect as well higher liability than that of saturated rail culture with raised beds （SR） ; Rain-fed Irrigation （RI） could maximally save irrigation water, but its application depended on the regional climate conditions, and should be applied together with weather forecast. Besides, water stress could enlarge the difference of ET between different nitrogen levels; nitrogen application could decrease evaporation, increase crop transpiration, and thus increase ET and yield.
出处
《中国农村水利水电》
北大核心
2005年第8期1-3,共3页
China Rural Water and Hydropower
基金
"863"计划项目(编号:2002AA2Z4331)部分研究内容。
关键词
水稻
节水灌溉
水量平衡
水分生产率
rice
water saving irrigation
water balance
water productivity
