密度和施肥量对不同分枝类型大豆产量的影响

Effect of Density and Fertilizer Amount on Yield of Different Branching Types of Soybeans

采用三因素裂-裂区试验设计,以东81735(寡分枝)、东03-2176(中等分枝)和东0331(多分枝)3个品种(系)为主区,4个种植密度(10、15、20和24万株.hm-2)为裂区,4种施肥量(300、500、700和900 kg.hm-2)为再裂区,研究了不同密度和施肥量对不同分枝类型大豆品种(系)产量的影响。结果表明,在不同肥密条件下,群体叶面积指数(LAI)呈单峰曲线变化,且最大值出现在盛荚期。3个品种的LAI峰值都出现在密度24万株.hm-2和施肥量900kg.hm-2的组合中。中等分枝品种东03-2176在密度为20～30万株.hm-2,施肥量为700～900 kg.hm-2时获得较高产量;多分枝品种在密度为20万株.hm-2,施肥量为900 kg.hm-2时获得高产。

The effect of planting density and fertilizer level on different branching soybeans were studied by the means of a split plot experiment.Three soybean lines（few-branched Dong-8175,mid-branched Dong-03-2176,multi-branched Dong-0331）,four planting densities（1.0,1.5,2.0 and 2.4×105 plant·ha-1）and four fertilizing amounts（300,500,700 and 900 kg·ha-1）were included in this study.The results showed that the maximum of leaf area index（LAI）of three lines appeared in the high density（2.4×105 plant·ha-1）and high fertilizer（900 kg·ha-1）combination in R4 stage four mid-branched Dong-03-2176,the highest yield was obtained at te planting density of 2.0×105-3.0×105 plant·ha-1with fertilization of 700-900 kg·ha-1;for multi-branched Dong-0331,the highest yield was achieved at planting density of 2.0×105 plants·ha-1 and fertilization rate of 900 kg·ha-1.