【摘要】 以超高产大豆辽豆14与普通大豆辽豆11为试材,研究了不同肥密处理对其氮素积累与利用的影响。结果表明:超高产大豆辽豆14整个生育期叶面积含氮量较高。结荚~鼓粒期叶片氮利用效率和光合氮利用效率均高于辽豆11。辽豆14氮素积累总量以300 kg.hm-2施肥处理,22.5×104株.hm-2种植密度的肥密组合最高。氮素积累总量肥力、密度和品种间具有明显的交互作用。氮素收获指数肥力与密度处理间差异极显著,肥力与品种、密度与品种以及肥力、密度和品种间均具有明显的交互作用。和辽豆11相比,不同肥密处理超高产大豆辽豆14的平均氮素利用效率高于辽豆11。更多还原

【Abstract】 Nitrogen was a very important yield limiting factor in soybean production.The objective of this article was to study the accumulation and utilization of nitrogen in super-high-yielding soybean.Comparative analysis of nitrogen accumulation and utilization were carried out through 2 years experiments with super-high-yielding soybean variety of Liaodou 14 and common soybean variety Liaodou 11 under different fertilizer levels and planting densities.Results showed that N content per leaf area of Liaodou 14 was higher than that of Liaodou 11 in the whole growth season.The leaf N use efficiency and photosynthetic N use efficiency of Liaodou 14 were higher than those of Liaodou 11 from podding to grain filling.The highest total N accumulation of Liaodou 14 appeared in the treatment of 300 kg·hm-2 fertilizer and 22.5×104 plant·hm-2 treatment.There was a significant interaction between fertilizer treatment,density treatment and cultivar of total N accumulation.N harvest index between fertilizer and density treatment reached a significant difference level.Fertilizer treatment and cultivar,density treatment and cultivar,fertilizer,density and cultivar of N harvest index showed a significant interaction.Compared with Liaodou 11,the average of N use efficiency of super-high-yielding Liaodou 14 was higher than that of Liaodou 11 under different fertilizer and planting density treatments.更多还原