不同冬小麦品种籽粒灌浆特性参数对供水的反应

以8个冬小麦品种为材料,在不同的供水条件下,研究了冬小麦籽粒灌浆特性参数对供水的反应。结果表明,不同的灌水处理下籽粒千粒重差异显著,旱区和灌2水的节水区的籽粒最大灌浆速率、平均灌浆速率和灌浆中期灌浆速率等均高于灌4水区,从而千粒重高于灌4水区。不同品种籽粒灌浆的不同特性参数对供水反应不同,但灌浆阶段的前期、中期和后期粒重积累量的比例大体一致,约为0.21,0.61和0.18。说明参试品种的前中后期籽粒积累与灌水无直接关系。

Responses of Grain-filling Parameters to Water Supply of Different Winter Wheat Cultivars

Responses of grain-filling parameters to irrigations of 8 winter wheat cultivars were studied.The results indicated that grain weight was significantly different among irrigations.The maximum grain-filling rate(Rmax),mean grain-filling rate(Rmean),and grain-filling rate of metaphase of treatments of no irrigation and water-saving with only two irrigations given were obviously higher than that of four irrigation treatment,leading to higher final grain weight than four irrigation treatment.Different grain-filling parameters of different cultivars responded differently to water regimes.However,the proportion of cumulated amount in grain during prophase,metaphase and anaphase was about 0.21,0.61 and 0.18 for all irrigation treatments,revealing there was no direct relation of periodical proportion of grain filling to water supply for the cultivars used.