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壮苗是小麦提高光能转化效率,充分利用自然资源,合理用肥用水达到增产、低成本的基础。所以在小麦生产中应该狠抓壮苗的培育。由于各地情况与生产经验不同以及认识上的差异,壮苗标准差别较大。确定壮苗的标准时曾提出要考虑冬前总茎数、叶龄、单株分蘖数、单株具有3—4片叶的大蘖数以及次生根数等,都是完全必要的。不过对壮苗与产量指标的关系以及实现既定产量指标是依靠主茎成穗,还是依靠分蘖成穗,还是主茎成趣与分蘖成穗并重,这几方面还不够明确。为此,下面
Strong seedling is wheat to improve the efficiency of light energy conversion, make full use of natural resources, rational use of fertilizer to achieve water production, low-cost basis. Therefore, we should pay close attention to the cultivation of strong seedlings in wheat production. Due to different situations and production experience and awareness differences, strong seedling standard differences. When determining the criteria for strong seedlings, it was proposed that the total number of stems before winter, leaf age, number of tillers per plant, number of big tillers with 3-4 leaves per plant, and number of secondary roots should all be considered as necessary. However, the relationship between strong seedling and yield indicators, as well as the achievement of the established yield indicators rely on the main stem into the spike, or depend on the tillering spike, or main stem fun and tiller panicles, these aspects is not clear enough. To this end, below