不同灌水模式对春小麦灌浆期光合特性日变化的影响

Study on diurnal variation of photosynthesis characters of spring wheat under different irrigation modes during grain filling stage

以大田实验为基础,采用5种不同灌水模式,在春小麦灌浆期对其光合速率进行测定.结果表明,灌浆期缺水,土壤水分亏缺越严重,对光合速率影响越大,从而对产量有较大影响.在小麦开花灌浆期实行控水灌溉方式对产量影响最大,较常规产量减产13.91%.

On the basis of a field experiment with five different irrigation modes, the net photosynthetic rates of spring wheat were measured during grain filling stage. The results showed that both photosynthetic rate and yield of spring wheat were influenced by soil water deficits during grain filling stage. In addition, non-conventional irrigation, such as reducing the volume and frequency of irrigation, affected the yield of spring wheat significantly, under which, the yeild reduced 13.91%, comparied with the yeild under conventional irrigation mode.