限水灌溉对冬小麦灌浆期旗叶叶绿素荧光动力学参数及产量的影响

Effects of limited irrigation on the kinetics parameters of chlorophyll fluorescence in filling stage and grain yield of winter wheat

在池栽、遮雨条件下,利用植物效能分析仪研究了减少灌水次数对豫麦50灌浆期旗叶叶绿素荧光动力学参数及产量的影响。结果表明,不同灌水处理小麦旗叶叶绿素含量和Tm值开花后均较高,然后逐渐降低;Fv/Fo、Fv/Fm在灌浆中、前期差异不大,而在灌浆末期迅速降低。全生育期不灌水处理在灌浆期旗叶叶绿素含量、Tm、Fv/Fo和Fv/Fm较低,而拔节期灌1水处理则较高。减少灌水次数会降低籽粒产量和田间耗水量,而提高了水分利用效率。

A plant efficacy analyzer was used to study the effects of reducing irrigation on the kinetics parameters of chlorophyll fluorescence of flag leaves in filling stage and grain yield of winter wheat with shielding from rainfall during its growth. The result showed that the chlorophyll content and Tm of different irrigation treatments were high in prophase and then reduced gradually in telophase of grain filling. But Fv/Fo and Fv/Fm had little difference between prophase and metaphase of grain filling and then reduced rapidly in telophase of grain filling. The chlorophyll content, Tin, Fv/Fo and Fv/Fm without irrigation were low, however that irrigated one time in heading stage was high. Reducing irrigation decreased grain yield and water consumption, but increased water utilization efficiency.