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实践证明,创造合理的群体结构是夺取三麦高产的关键。因此,在生产上需要定期地调查三麦从播种到出苗、从出苗到分蘖、从分蘖到抽穗群体大小的发展过程。为确定科学的水肥管理措施,提供依据。几年来我们都是采用1/2,000法定点调查麦类的群体。所谓1/2,000法,是指每个样点面积为3平方尺,相当于每亩土地面积的二千分之一。调查方法如下: 在麦类的三叶期前选定样点位置,选取的样点要能够代表全田的苗情。为了计算方便,样点的数目应为偶数。小区面积不足一亩地时可选2点;1—10亩
Practice has proved that creating a reasonable group structure is the key to winning three wheat high yield. Therefore, it is necessary to regularly survey the development process of Sanmai from sowing to emergence, from emergence to tillering, from tillering to heading population size. To determine the scientific management of water and fertilizer to provide the basis. For years we have used the 1 / 2,000 statutory survey of wheat populations. The so-called 1 / 2,000 method means that each sample area of 3 square feet, equivalent to one-thousandth of acre of land area. Survey methods are as follows: In the wheat clover period selected sample location, select the sample point to be able to represent the whole field of seedling. For calculation convenience, the number of samples should be even. Area of less than an acre of land optional 2:00;