干旱绿洲灌区春小麦亏缺灌溉效应的研究*
【摘 要】适度土壤水分亏缺可增加根干重和分布深度。水分亏缺程度增加,叶水势降低,气孔阻力增大,蒸腾强度成倍下降,源库明显受到抑制,粒叶比高于充分供水。春小麦全生育期土壤水分下限低于60%时产量显著降低,拔节至抽穗期缺水对产量影响最大,增源是亏缺灌溉解决的主要问题。
【关键词】产量;机制;亏缺灌溉;春小麦
A Study on Effects of Deficit Irrigation for Spring Wheatin Arid Oasis Irrigation Area
MA Zhong-ming
(Gansu Academy of Agricultural Sciences,Lanzhou,Gansu,730070)
Abstract: The dry roots weight and its distribution depth increased under moderate waterdeficit.Compared to sufficient irrigation,the leaf potential decreased,source and sink wereinhibited ...... (共5245字) [阅读本文]>>