摘要
选取豫东平原安阳、西华、信阳、许昌、郑州、驻马店等地冬小麦为研究对象,采用作物系数法计算了ET0频率25%、50%和75%条件下各地冬小麦需水量并进行分析。结果表明,安阳、许昌、郑州、驻马店冬小麦全生育期需水量呈现出湿润年较低、干旱年较高的趋势,最大值介于396.1～729.0mm。各地冬小麦需水量最大的生育阶段均为抽穗-成熟,平均占全生育期需水量45.9%;西华、郑州该生育阶段需水量占全生育期百分比随ET0频率增大而上升,呈现为相对干旱年份需水更多。豫东平原各地冬小麦逐日需水量10-2月均值随ET0频率增大而下降,3月往后上升,其均值为4.31mm/d。ET0频率25%～50%范围对10-3月逐日需水量影响较大。
Winter wheat of Anyang, Xihua, Xinyang, Xuchang, Zhengzhou and Zhumadian in East Henan were selected as studying object, the crop water requirement of winter wheat with ETo frequency at 25%, 50% and 75% were computed and analyzed. The results showed that the water requirement of total growth stage of winter wheat at Anyang, Xuchang, Zhengzhou and Zhumadian was lower at wet years and higher at dry years, and the maximum value was between 396.1 to 729.0 mm. The mean percentage of crop water requirement at heading to mature stage to total growth stage was 45. 9%, which was the maximum water requirement growth stage. And the percentage of winter wheat water requirement at heading to mature stage to total growth stage at Xihua and Zhengzhou rose with the increase of ETo frequency. The average value of daily water requirement of winter wheat between October to February declined with the increase of ET0 frequency, but rose up after March, the mean value was 4. 31 mm/d. The ETo frequency changed from 25 %to 50% influenced daily water requirement between October to March aDDarentlv.
出处
《节水灌溉》
北大核心
2013年第5期5-7,14,共4页
Water Saving Irrigation
基金
三峡大学科研启动基金项目(KJ2011B027)
三峡大学青年科学基金项目(KJ2012A001)
关键词
冬小麦
作物需水量
ET0
豫东平原
winter wheat
crop water requirement
reference evapotranspiration（ETo）
East Henan
