小麦冬前干物质积累量是否适宜,对小麦后期产量影响很大.其干物质积累量受许多因素的影响,在土壤肥力基础较高的条件的条件下,播种期则是影响冬前干物质积累量的极其重要的因素.目前在生产中常常由于播种过晚,冬前干物质积累量不足,即使后期加强肥水管理,也往往达不到应有的产量水平.播种过早,生长过旺,干物质积累量过大,造成地力消耗,后期脱肥或发生冻害而不能高产.为此,我们于1979、1981两年,对小麦冬前不同干物质积累量与产量形成的关系,以及播种期对干物质形成的影响进行了试验观察,初步找出了小麦越冬前较合理 Whether the dry matter accumulation of winter wheat is suitable before winter has a great influence on the yield of wheat.The dry matter accumulation is affected by many factors, under the conditions of higher soil fertility, the sowing period is the effect of dry matter before winter Accumulation is extremely important factor.Currently in the production is often too late due to sowing, lack of accumulation of dry matter before winter, even if the latter to strengthen fertilizer and water management, often fail to meet the desired level of production. Sowing too early, over-growth , The accumulation of dry matter is too large, resulting in consumption of manpower, post-fattening or freezing injury and can not be high yield.To this end, we in 1979 and 1981, the winter dry matter accumulation and yield of different dry matter, Period on the formation of dry matter were observed experimentally found that the pre-winter wheat more reasonable