肥力对冬小麦开花后营养体内光合产物积累运转及产量的影响

Effect of Different Soil Fertility on Winter Wheat Photosynthetic Yield Accumulation and Translocation and Yield after Flowering

对不同肥力水平旱地冬小麦开花后营养体内光合产物积累、运转和对产量影响的研究表明，开花后同一天，各器官光合产物的积累量均随肥力水平提高而增加。施肥使叶鞘、茎光合产物积累量提前于开花后第１０ｄ达最大值；营养器官光合产物输出值随肥力水平提高呈增加趋势。施肥处理输出值是茎＞叶片＞叶鞘，不施肥处理则是茎＞叶鞘＞叶片；

The weighing method is adopted to study the effect of different soil fertility conditions on the photosynthetic yield accumulation,translocation and yield of winter wheat during the vegetative period after flowering in rainfed farmland.The results show that in the same day after flowering,the accumulation of photosynthetic yield increases with an increase in soil fertility.The application of fertilizer makes the leaf sheath,the accumulation of stem photosynthetic yield reach their maximum values 10 days in advance after flowering.The photosynthetic yield values of vegetative organs tend to increase with an increase in soil fertility.In fertilizer application treatment,stem has the largest output value,followed by leaf blade and leaf sheath.But without fertilizer application treatment,the sequences appear as follows:stem has a larger output value than that of leaf sheath,and the leaf blade has the least.Grain dry weight and the daily weight gaining intensity increase with an improvement in soil fertility.