播期对不同专用型小麦籽粒灌浆特征参数和产量的影响

Effect of Sowing Date on Grain Filling Characteristic Parameter and Yield of Special Used Wheat

以3个不同专用型小麦品种为材料,研究了不同播期条件下籽粒灌浆特征参数、粒重和产量的差异。结果表明:3个专用型小麦品种平均灌浆速率(V)均以中播为最高,灌浆持续期(S)和有效灌浆持续期(Se)以早播最长;平均灌浆速率与最大百粒重之间呈显著正相关;3个不同专用型小麦品种最大百粒重和产量均以中播为最高,晚播最低。

With the three special used types of wheat cultivars, the characteristic parameter of grain filling, grain weight and yield was studied under different sowing date in 2000 - 2001, and the re-sult showed that average rates of grain filling (V) of three special used wheat cultivars was the highest at the middle sowing date and continual filling time (S) and valid continual filling time (Se) was the longest at the first sowing date. The average grain filling rat:es had positive correla-tion with maximum 100 grain weight. The maximum 100 grain weight and yield of the three special used wheat cultivars were the highest at the second sowing date, and the lowest at the last sowing date.