河西灌区节水灌溉的适宜土壤水分指标研究*
【摘 要】在分析土壤水分变化特征的基础上,研究了节水灌溉的适宜土壤水分指标。结果表明,春小麦出苗至抽穗期、抽穗至灌浆初期和灌浆初至成熟期土壤适宜水分下限指标分别为68.15%~73.19%、57.16%~67.14%和46.16%~49.14%。玉米出苗至大喇叭口期、大喇叭口至灌浆初期和灌浆初至成熟期土壤水分下限指标分别为50%~60%、63%~70%和58%~60%。经示范印证,可指导大田生产。
【关键词】土壤水分;指标;节水灌溉;春小麦;玉米
Studies on Soil Moisture Criteria for Water-saving Irrigationin Hexi Irrigation Area
MA Zhong-ming
(Gansu Academy of Agricultural Sciences,Lanzhou,Gansu,730070)
Abstract: Based on analysis of the characteristics of soil moisture changes,t ...... (共4160字) [阅读本文]>>