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1.合理密植与播量小麦的穗数是群体产量构成的主导因素.因此,必须根据合理穗数的要求和栽培技术水平.确定基本苗数或播种量。在一般栽培条件下,依靠主茎成穗,比较容易获得高产。今年我县有些社队小麦成穗数不足,影响了产量.其原因是由于:①有的“两密一稀”、大垄沟麦,垄大播幅窄.下种量相对减少,加之去年秋雨多,种得粗,造成出苗率低,基本苗不足;②去年秋雨多、日照不足,地温低、不利于麦苗生长、分蘖,特别是晚茬麦,苗弱蘖少,总分蘖数不够:③有的
1. Reasonable close planting and sowing The number of ears of wheat is the dominant factor in the production of the group, therefore, we must determine the basic seedling number or sowing quantity according to the requirements of reasonable number of spikes and the level of cultivation techniques. In general cultivation conditions, relying on the main stem into ear, more easily obtain high yield. This year, some communes and counties in our county lack of wheat into the spike, affecting the yield. The reason is due to: ① Some “two dense and one thin”, large furrows wheat, ridge big narrow, the relative reduction of the next species, coupled with last autumn More coarse seed, resulting in low emergence rate, lack of basic seedlings; last autumn more than the lack of sunshine, low ground temperature is not conducive to the growth of wheat seedling, tillering, especially late wheat, seedling less tiller less total tillering number: some