大豆产量空间分布特性的初步研究

南方地区现有品种(系)间产量空间分布存在显著差异。产量在群体冠层中主要分布于上层、中层和主茎,但品种(系)间有相当大的变异。根据上、中层和主茎产量百分率可把品种(系)的产量空间分布在垂直方向上分为上层型、均匀型和中层型,在水平方向上分为主茎型、并重型和分枝型,共组合成9种空间分布类型。垂直分布的均匀型和水平分布的主茎型和并重型是高产的空间分布类型。

PRELIMINARY STUDY ON SOYBEAN YIELD DISTRIBUTION IN SPACE

It was shown that there existed the significant differences in the yield distridution in space a-mong varieties or lines in South Region of China. Sed yield was mainly concentrated on the top two-thirds of the canopy (based on plant height) and on main stem of plants, with certain amount of variation among varieties or lines. Based the percentages of yields on top and middle layer in canopy and on main stem in a plant, the yield distribution at vertical direction could divided into three types, i. e. , upper type, uniform type and middle type, the yield distribution at horizental direction also into three types, i. e. , main-stem type, uniform type and branch type and thus 9 distribution types were obtained from combination of distribution types at vertical and horizental direction. Uniform type at vertical direction and mainstem type at horizental direction could be the high - yielding distribution types.