密度和株行距配置对川中丘区夏玉米群体光分布及雌雄穗分化的影响

金容,李钟,杨云,周芳,杜伦静,李小龙,孔凡磊,袁继超

Effects of density and row spacing on population light distribution and male and female spike differentiation of summer maize in hilly area of central Sichuan

Rong JIN,Zhong LI,Yun YANG,Fang ZHOU,Lun-Jing DU,Xiao-Long LI,Fan-Lei KONG,Ji-Chao YUAN

表6 雌雄穗特性与产量构成因素以及穗位层透光率的关系

Table 6 Correlation coefficients of ear and tassel characteristics with yield components and light transmittance of ear position layer

指标 Index 穗长 Ear length 秃尖长 Bald length 穗粗 Ear diameter 行粒数 No. of kernels per line 穗粒数 No. of kernels per ear 百粒重 100-grain weight 穗位层透光率 Light transmittance of ear position layer 消光系数 Extinction coefficient 小穗分化期Spikelet differentiation 雌穗特性 Ear characteristics 长Length 0.78** -0.72* 0.89** 0.88** 0.80** 0.72* 0.16 0 中部直径Central diameter 0.15 0.22 -0.73* 0.37 0.43 0.32 0.02 0.07 雄穗特性 Tassel characteristics 长Length 0.66* -0.73* 0.64* 0.78** 0.60 0.64* 0.03 0.18 中部直径Central diameter 0.56 -0.62* 0.83** 0.67* 0.63* 0.44 -0.11 0.22 小花分化期Floret differentiation 雌穗特性 Ear characteristics 长Length 0.82** -0.75** 0.83** 0.92** 0.79** 0.79** 0.24 -0.01 中部直径Central diameter 0.40 -0.46 0.26 0.37 0.44 0.49 0.26 -0.21 雄穗特性 Tassel characteristics 长Length 0.69* -0.77** 0.74** 0.87** 0.65* 0.76** 0.17 0.08 中部直径Central diameter 0.65* -0.90** 0.81** 0.87** 0.78** 0.67* 0.05 0.12 吐丝期 Silking stage 雌穗特性 Ear characteristics 总小花数No. of total florets/ear 0.73** -0.77** -0.30 0.89** 0.91** -0.37 0.83** -0.75** 吐丝小花数No. of silked florets 0.79** -0.66** 0.10 0.72** 0.77** 0.02 0.53** -0.53* 受精小花数No. of fertilization florets 0.79** -0.82** -0.18 0.88** 0.89** -0.27 0.59** -0.50* 小花败育率Rate of floret barrenness -0.64** 0.65** 0.06 -0.66** -0.67** 0.13 -0.28 0.22 单株果穗受精率Fertilization rate per ear 0.64** -0.80** -0.41 0.85** 0.84** -0.48* 0.52* -0.39 雄穗特性 Tassel characteristics 成对小穗数Spikelet number 0.71** -0.82** -0.38 0.94** 0.93** -0.51* 0.58** -0.51*