雨养和灌溉条件下小麦籽粒灌浆特性的比较

Comparison with Grain Filling Characteristic of Wheat Between Precipitation Growth and Irrigation growth

以莱阳农学院近年选育的4个冬小麦品种(系)为材料,比较了雨养和灌溉条件下小麦籽粒的灌浆特性。用Logistic方程对籽粒灌浆过程进行分析,结果表明:雨养条件下小麦籽粒增重迅速,平均灌浆速率增大且峰值高,但灌浆持续期缩短、峰值提前出现。相对于灌浆速率而言,灌浆持续期对千粒重的贡献更大。雨养条件下灌浆持续期缩短也最终造成千粒重降低,灌溉条件下恰恰相反。因此在小麦生育后期及时灌水,可以延长灌浆持续期,延缓灌浆速率的下降趋势,从而增加籽粒的重量。

Choosing the four main winter wheat lately years, comparing with grain filling chara We analyzed grain filling processes with Logisti grain filling was increasing, furthermore peak varieties which were breeding by Laiyang Agricultural College in the cteristic of wheat between precipitation growth and irrigation growth. c equation value was , it showed that grain filling higher under precipitation, was faster and average rate of but grain filling duration became short, peak value appeared in advance. Relative to rate, grain filling duration conduced to kilo- grain weight. Duration was short under precipitation, which resulted in decrease of kilo -grain weight. Therefore at the later period, the wheat should be irrigated in time, which could prolong grain filling duration and defer the decrease trend of rate, moreover would increase the grain weight.