宁夏引黄灌区大豆农艺及产量性状分析

Analysis of Soybean Agronomic Traits and Yield in Irrigated Area of Ningxia

对宁夏黄灌区大豆农艺及产量性状的相关分析表明,株高与茎粗、底荚高度和主茎节数,生育时间与株高、主茎节数和百粒质量呈显著正相关;单株有效荚数与单株粒数、单株粒质量,单株粒数与单株粒质量、单位面积产量呈极显著正相关;单株粒数、单株荚数与百粒质量呈显著负相关。主成分分析确定4个主成分因子为产量、粒质量、茎粗和百粒质量。在所设计密度范围内有效荚数、单株粒数、粒质量和经济系数随密度的增大而减少。模拟产量回归方程表示为y=-1.962 6x2+6.639 2x+5.339 3(r2=0.846 5),解得密度在1.69×104/666.7m2时,可获得最高产量405.73kg/666.7m2。

Experimental studies have shown that some agronomic traits are relevant to each other, for example, plant height and stem diameter, the lower pod height and main stem of sessions, growing days and plant height, main stem numbers of node and 100 grains mass are significantly and positively correlated. The effective pods per plant and grains per plant, grain mass per plant, grain number per plant and grain mass per plants and yield per 666.7 m2 are extremely and positively correlated. Grain number per plant and 100 grains mass showed significant and negative correlation. The yield, grain mass , stem diameter, 100 grains mass factors were four principal components. The effective pods per plant and grains per plant, grain mass per plant and economic coefficient decreased with the increase of density in designed range. The yield regression equation was y=- 1. 962 6x2 ＋ 6. 639 2x＋5. 339 3 （r^2 =0.846 5）, the highest yield of 405.73 kg/666.7 m^2 was obtained when the density was 1.69× 10^4 plants per 666.7 m^2.