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作者	单位
张向前，杜世州，曹承富，乔玉强，赵竹，张耀兰	（安徽省农业科学院作物研究所，安徽省农作物品质改良重点实验室, 安徽合肥 230031）

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中文摘要:

为给淮北小麦选择适宜的播期，以冬小麦半冬偏冬性品种烟农19和半冬性品种皖麦52为材料，研究了播期（10月3日、10月10日、10月17日、10月24日、10月31日和11月7日）对小麦群体干物重、叶面积指数、叶绿素含量、叶绿素荧光和产量的影响。结果表明，两个品种群体干物重、叶面积指数、叶绿素含量皆以10月10日和17日播种时最高，其次为10月3日和24日播种。正常播种（10月10日）和适度晚播（10月17日）可以改善小麦叶绿素荧光特性，其中10月10日播种时烟农19的F_o、F_m、Fv/Fm、q_P、ETR和Φ_psII分别比10月3日和11月7日播种的增加了8.5%、7.9%、3.0%、38.1%、15.9%、16.9%和21.1%、33.3%、6.9%、73.0%、67.6%、62.0%。10月10日和17日播种时烟农19和皖麦52的穗数、穗粒数、千粒重、容重和产量皆高于其他播期，并与11月7日播种处理差异显著。因此10月10日至10月17日可作为淮北地区半冬性小麦品种的适宜播期。

英文摘要:

In order to meet the growth and development process of wheat in Huaibei area fully coordinated with local light, temperature, water and other natural resources, a field experiment was conducted to study the effect of different sowing date(October 3, October 10, October 17, October 24, October 31 and November 7) on population dry matter weight, leaf area index, chlorophyll content, chlorophyll fluorescence and yield of wheat. The results showed that Yannong 19(semi-winter and inclined to winterness) and Wanmai 52(semi-winter) sowed on October 10 and 17 had the highest population dry matter weight, leaf area index and chlorophyll content, and followed by October 3 and 24. Normal sowing(October 10) and moderately late sowing(October 17) could help to improve chlorophyll fluorescence parameters of wheat, compared to the early sowing(October 3) and late sowing(November 7), and F_o, F_m, Fv/Fm, q_P, ETR and Φ_psII of Yannong 19 sowed on October 10 was increased by 8.5%, 7.9%, 3.0%, 38.1%, 15.9%, 16.9% and 21.1%, 33.3%, 6.9%, 73.0%, 67.6%, 62.0%, respectively. The spike number, grains per spike, 1000-kernel weight, test weight and yield of Yannong 19 and Wanmai 52 sowed on October 10 and 17 were all higher than that of other sowing dates, and the difference with the sowing date of November 7 was significant. All the findings demonstrated that normal sowing date and moderately late sowing could improve population traits, chlorophyll fluorescence and yield of wheat, and the suitable sowing date of semi-winter wheat varieties in Huaibei area was from October 10 to October 17.

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