不同播期、密度和施肥量对保豆3号农艺性状影响

在2个地点采用裂区设计,研究3个播期、4个种植密度和3种施肥水平对保豆3号农艺性状和产量的影响。结果表明,早播可增加单株有效荚数和单株粒质量,获得较高产量;增加密度可减少植株主茎节数、分枝数、有效荚数和单株粒质量;增加施肥量可增加单株有效荚数和单株粒质量。保豆3号的夏播高产栽培技术为:土壤肥力较高的地区在6月17日左右播种,密度22.5×104 hm-2,施肥量为尿素60.0kg/hm2+磷酸二铵90.0kg/hm2+氯化钾75.0kg/hm2;土壤肥力较低的地区在6月10日左右播种,密度22.5×104hm-2,施肥量为尿素90.0kg/hm2+磷酸二铵135.0kg/hm2+氯化钾112.5kg/hm2。

Effects of Sowing Date, Planting Densities and Fertilizer Levels on Agronomic Traits of Baodou 3

The effect of three sowing times, four plant densities and three fertilizer levels on agronomic characters and yield of soybean were investigated by split plot design in two locations with different fertility soil. The results indicated that early sowing could increase the number of effective pods per plant, seed mass per plant and obtain higher yield. Increased density could reduce node number on main stem, branch number, valid pod number and seed mass per plant. Increased fertilizer could increase valid pod number and seed mass per plant. The suitable cultivation measures of Baodou 3 were that 1) sowing on June 17 with the density of 22.5×10⁴ plants/hm and fertilizer level of urea 60.0 kg/hm+DAP 90.0 kg/hm+KCl 75.0 kg/hm in higher fertility soil,sowing on June 10 with the density of 22.5×10⁴ plants/hm and fertilizer level of urea 90.0 kg/hm+DAP 135.0 kg/hm+KCl 112.5 kg/hm in lower fertility soil.