高产小麦群体动态结构合理与否,直接影响能否达到穗多,穗大的目的。高产的合理群体动态结构是根据所用品种生产潜力,及其在当地生长发育进度来决定的。它的主要环节是就所用的品种,以每亩的产量要求决定有效穗,然后再根据品种在当地拔节期主茎所具有的叶片数减去两片叶,即为当地高产小麦的有效分蘗期叶令。有效分蘖期的叶令确定之后,根据叶蘗同伸规律可以判断该叶令期能出现几个分蘖,从而可以确定高产途径中依靠分蘗穗的程度。如早熟品种墨叶小麦,它的拔节期叶令是6片叶,那么它的有效分蘗期的叶令是6-2=4片,主茎4片叶令的同伸蘗,一般只能达到1.2个,按照80％的成穗率,它能依靠的分蘗穗只能是一个(单株有效穗2个),因此40万有效穗的高产田,它的 The dynamic structure of high-yielding wheat population is reasonable or not, and it has a direct impact on the ability to achieve spikes and panicles. The rational population dynamic structure of high yield is determined by the production potential of the cultivars used and their progress in the growth and development of the area. It is the main part of the varieties used to determine the effective yield per acre panicle, and then according to the variety of local jointing stems with the number of leaves minus the two leaves, the local high-yielding wheat is an effective tillering stage Ye Ling. After the effective tillering leaf order is determined, according to the rule of leaf tillering and extension, we can determine the number of tillers in the leaf order, so we can determine the degree of tillering panicle in the high yielding pathway. If the early maturing varieties of Mexican leaf wheat, its jointing leaves order is 6 leaves, then its effective tillering leaves order is 6-2 = 4, the main stem 4 leaf leaves with the same tiller, can only be achieved 1.2, according to 80% of the spike rate, it can only rely on the tillering spike (two effective panicles per plant), so 400000 effective spike yield field, its