群体分布与大豆农艺性状关系的研究

研究了大豆(Clycine max)群体分布与其生长农艺性状的关系,为构建合理的群体分布提供理论依据。2009年以合丰45、红丰11为材料,设计6个不同的群体分布进行田间试验,采用LSD法比较分析群体分布对农艺性状的影响,计算了单位面积茎数的补偿效应,分析了产量变化趋势及其与农艺性状和群体分布的关系,并对农艺性状进行主成分分析。结果表明:1)群体分布显著影响农艺性状,株距较行距对农艺性状的影响更显著,无品种株型差异。2)株距减小产生的单位面积茎数补偿效应值随行距增大呈二次抛物线变化趋势;行距增大产生的2组单位面积茎数补偿效应值随株距增大变化趋势不一致,且单位面积茎数补偿效应值存在株型差异。3)群体分布显著影响产量,获得产量极值的群体分布存在品种差异;产量与茎粗、行距显著正相关。4)本研究分析得到2个主成分生长性状因子、产量性状因子,其中,生长性状因子具有较强的品种特异性,群体分布对2因子的影响不同。

Relationship between group distribution and agronomic traits in Clycine max

The relationship between group distribution and agronomic traits in Clycine max was studied to provide a theoretical basis for constructing a reasonable group distribution.The field experiment was carried out with C.max cultivar Hefeng45,Hongfeng11 by setting 6 different group distributions in 2009,LSD method was used to compare and analyze change of agronomic traits in the different group distribution,compensation effect of stem numbers in unit area was calculated,the change trend of yield and its relation...