中文摘要：

为给不同筋型小麦高产种植筛选适宜的播期,以强筋小麦品种济麦20和中筋小麦品种中麦8号为试验材料,采用盆栽方法,研究了播期对两种筋型小麦旗叶光合及籽粒灌浆特性的影响。结果表明,不同播期下济麦20和中麦8号的旗叶光合和籽粒灌浆特性不尽相同。适期播种（10月7日）有利于改善济麦20旗叶光合和籽粒灌浆特性;而早播（9月30日）有利于改善中麦8号旗叶光合和籽粒灌浆特性。不同播期下,济麦20和中麦8号籽粒灌浆进程均符合Logistic方程。在本试验条件下,综合来看,济麦20以10月7日播种最优,而中麦8号以9月30日播种最优。

英文摘要：

The effects of sowing dates（September 30,October 7and October 14）on the characteristics of flag leaf photosynthesis and grain filling of wheat cultivars with different gluten were investigated between strong gluten wheat（Jimai 20）and middle gluten wheat（Zhongmai 8）by pot planting experiment.The results indicated that the effects of planting date were different on characteristics of flag leaf photosynthesis and grain filling between Jimai 20 and Zhongmai 8.Proper sowing time was beneficial to enhance the characteristics of flag leaf photosynthesis and grain filling of Jimai 20;however,early seeding could effectively improve the characteristics of flag leaf photosynthesis and grain filling of Zhongmai 8.The dynamic kernel weight change in the grain formation processes of Jimai 20 and Zhongmai 8 were all following the logistic equation under different sowing dates.The suitable planting date for different gluten wheat can realize the coordination and improvement among character-istics of flag leaf photosynthesis and grain filling.The appropriate sowing date of strong gluten wheat（Jimai 20）and middle gluten wheat（Zhongmai 8）was October 7and September 30,respectively.