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大豆是我省淮北地区主要作物之一,播种面积约900万亩。影响大豆产量不高的原因,除土壤瘠薄、旱涝频繁外,从栽培技术来看,主要是耕作粗放,播种质量差,田间管理不及时,密度不合理,田间植株分布不匀等。匀度是衡量田间植株实际分布的数值,表示在一定密度条件下田间植株的均匀程度。标准匀度包含群体内密度相同和单株之间距离相等两个方面;如果密度和植株间的营养面积参差不齐,势必影响产
Soybean is one of the main crops in Huaibei area in our province, sown area of about 9 million mu. In addition to the infertile soils and frequent droughts and floods, the main reasons affecting soybean yield are mainly extensive farming, poor sowing quality, improper field management, irrational density and uneven distribution of plants in the field. The evenness is a measure of the actual distribution of plants in the field and indicates the uniformity of the plants in the field under certain density conditions. The standard concordance includes two aspects: the same density in the population and the same distance between the two plants; if the density and the nutrient area between the plants are uneven, it is bound to affect the production