春大豆氮肥施用与大豆品种组合优选研究

Optimal Combination of Nitrogen Fertilizer and Spring Soybean Varieties in Chongqing

以特豆1号、浙春3号和特豆5号为材料,研究了不同氮肥处理对春大豆主要农艺性状、产量及产量构成因素的影响。结果表明:特豆5号在施纯氮90 kg.hm-2时,大豆籽粒氮含量、氮利用率和产量均高于其它处理组合,产量达2 240 kg.hm-2。3个供试品种中,特豆5号是氮高效利用型品种,浙春3号对氮最敏感。施氮水平和品种间具有极显著的互作效应,以A2B3组合(特豆5号施纯氮90 kg.hm-2)产量最高。

Three soybean varieties,including Tedou No.1,Zhechun No.3 and Tedou No.5 were selected,and three nitrogen level（0,90,120 kg·ha-1）were applied,to study the effect of N and variety combinations on main agronomic characters,yield and yield components of spring soybean.When Tedou No.5 was growing under 90 kg·hm-2 nitrogen,the seed nitrogen content,nitrogen utilization efficiency and yield were all higher than other treatments,and the yield reached 2 240 kg·ha-1.In three tested varieties,Tedou No.5 had higher nitrogen utilization efficiency,while Zhechun No.3 was sensitive to nitrogen.Significant interaction existed between nitrogen rate and varieties,and the treatment combination A2B3（Tedou No.5 growing under 90 kg·ha-1 nitrogen）got the highest yield.