摘要
研究了早熟18大豆品种不同播种密度对籽实产量及构成因素的影响。结果表明,播种密度与单株分枝数、单株荚数和单株籽实重呈极显著负相关(P<0.01),相关系数依次为-0.963 8,-0.970 6和-0.966 3,与茎数/m2、荚数/m2呈极显著正相关(P<0.01),相关系数依次为0.985 3和0.971 7。茎数/m2与荚数/m2呈极显著正相关(r=0.973 7,P<0.01),荚数/m2与单株籽重、单株荚数和单荚重均呈极显著负相关(P<0.01),相关系数依次为-0.9 6 7 6,-0.9 6 3 5和-0.9 4 6 2。播种密度(以株距表示)与茎数/m2补偿效应呈显著直线回归关系(P<0.05),与荚数/m2,籽实重/m2补偿效应均呈极显著三次抛物线回归关系(P<0.01)。单位面积籽实重随株距增加而变化的回归方程为:W=404.270 0-0.301 7h+4.706 1h2-1.965 1h3(r=0.850 3,P<0.05),以10株/m2(h=20 cm)的籽实产量最高,达427.3 g/m2,高于、低于此播种密度,单位面积籽实产量均下降。
This experiment examined the effect of the sowing density of G. max on seeds yield and plant morphology. Results indicated that there was a significantly negative relationship between plant density （plants/m^2） and plant branching （r=-0. 963 8,P〈0. 01）,pods number （r=-0. 970 6,P〈0. 01）,and seeds weight （r=-0. 966 34,P〈0.01）; as well as a significantly negative relationship between pods number and seeds weight （r=-0. 967 6,P〈0.01）,pods per plant （r=-0. 963 5,P〈0.01）,and pods weight （r=-0. 946 2,P〈0. 01）. A significantly positive relationship was found between both sowing density and stems number （r=0. 985 3,P〈0. 01） sowing density and pods number （r=0. 971 7, P〈0. 01）,with a significantly positive relationship also found to exist between stems number and pods number （r= 0. 973 7, P〈0. 01）. The largest seeds yield recorded was 427.3 kg/m^2 ,achieved at a sowing density of 10 plants/m^2. Other plant attributes recorded at this sowing density include.branching of 7.64, pods number 84.46, and pods weight 0. 689, with the seeds weight per pod ratio was 68.8M. The relationship between seeds yield and sowing density was best described by the parabola regression equation. W（g/m^2） =404. 270 0-0. 301 7 h＋4. 706 1 h^2- 1. 965 1 h^3 （r= 0. 850 3,P〈0. 05）
出处
《草业学报》
CSCD
2005年第5期43-47,共5页
Acta Prataculturae Sinica
基金
国家重点基础研究规划项目(G2000018602)
国家自然科学基金西部重大研究计划项目(90102011)
农业部农牧交错带生态农业建设研究与示范项目资助
关键词
早熟18大豆
相关系数
补偿效应
Glycine max
correlation coefficient
supplement effect
