中文摘要：

在防雨池栽培条件下，以2个优质强筋小麦品种（济麦20和藁城8901）为试验材料，研究了花后不同水分供应状况对籽粒产量、籽粒品质（粉质仪参数和面包体积）及其蛋白质组分的影响．结果表明：2个品种的籽粒产量、面粉的面团形成时间、面团稳定时间和制成面包体积均随花后灌水次数的增加呈先升高后降低的趋势；其中，花后灌1水（花后7d）时藁城8901的籽粒产量最高，花后灌2水（花后7d＋花后14d）时济麦20的籽粒产量最高；2个品种面粉的面团形成时间、面团稳定时间和制成面包体积均以花后灌1水时最优．单体蛋白含量、不溶性谷蛋白含量、谷蛋白总含量、蛋白质含量以及湿面筋含量也呈现类似的变化趋势．逐步回归分析表明，花后不同水分供应状况下，不溶性谷蛋白含量是影响面团稳定时间的关键因素，谷蛋白总合量与面包体积的变化密切相关．因此，为了保持优质强筋小麦品质的稳定性，水分管理应以改善籽粒蛋白质特别是谷蛋白组分的构成为目标．

英文摘要：

In order to investigate the effects of post-anthesis irrigation frequency on the grain quality of strong gluten winter wheat, two eultivars Jimai 20 and Gaocheng 8901 were subjected to a series of irrigation frequencies under rainfall proof conditions, with their grain yield and grain quality （ farinograph parameters and loaf volume） and protein composition evaluated. The results indicated that with increasing irrigation frequency, the grain yield of the two cultivars, their wheat flour dough development time, dough stability time, and loaf volume were noted to be increased first but decreased then. The grain yield and quality of Gaocheng 8901 were the highest when irrigated once after anthesis, while those of Jimai 20 were the best when irrigated twice alter anthesis, respectively. The contents of monomeric protein, soluble glutenin, insoluble glutenin, total glutenin, flour protein, and wet gluten in the grains displayed the similar trends. Stepwise regression analysis showed that under the test post-anthesis irrigation frequencies, the key factor affecting dough stability time was insoluble glutenin content, and loaf volume was significantly correlated with total glutenin content. It was suggested that to maintain the quality stability of high grade strong gluten winter wheat, irrigation management should take the improvement of grain protein composition, and glutenin in particular, as the target.