播前灌水深度对冬小麦生物学性状及产量的影响

Effects of Different Depth Irrigation Before Sowing on Root-shoot and Yield of Winter Wheat

利用自制的根管装置, 在土壤养分一致条件下, 从冬小麦根系生物量、地上部表观生物学性状、生物产量、经济产量和千粒重等方面, 研究了播前灌水深度对冬小麦生物学性状及产量的影响。结果表明, 播前90cm处灌水的根系生长快、发育好、干重高; 60cm处灌水的千粒重最高; 而30cm处灌水的表观生物学性状指标、生物产量和经济产量最高。

Under the consistent soil nutrients condition of root t ub e,the different depth irrigation before sowing was undertaken,and changes of the external biological characters,above ground biomass,grain yield,the spatial dis tribution of the low ground dry root biomass and thousand-grain weight of winte r wheat were studied.The results showed that compared with control(non-irrigat ion),irrigation at 90cm depth produced the highest dry root bio mass,while at 60cm thousand-grain weight and at 30 cm the external biological character index,above ground biomass and economic yield were highest.The other treatments were different and inferior to the tre atments at 30cm and 60cm,but they were better than the control.