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氦素积累总量以300kg·hm^-2施肥处理，22．5×10^4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。
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 fertihzer and 22.5 × 10^4 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. Fertihzer treatment and eultivar, 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.
出处
《大豆科学》
CAS
CSCD
北大核心
2008年第6期960-965,共6页
Soybean Science
基金
辽宁省教育厅资助项目(05L378)
辽宁省教育厅创新团队资助项目(2006T116)
关键词
大豆
超高产
施肥
种植密度
氮素
Soybean
Super- high - yielding
Fertilizer
Planting density
Nitrogen
