【摘要】 密植条件下,不同群体结构对半矮秆大豆合丰42号影响较大。(1)随着群体密度增加,单株叶面积、干重、荚数、粒数降低,个体发育变差,倒伏加重;而群体干物重、叶面积系数、荚数、粒数及产量在一定范围内呈增加趋势;(2)合丰42号密植最佳群体结构为45株/m2,盛花期和满粒期叶面积指数分别为4.82和1.70,干物重分别为396.0g/m2和324.0g/m2,单株粒数47.1个,公顷产量为3578.3kg,较垄作对照增产18.3%。更多还原

【Abstract】 Under compant planting, there is the bigger effect of different population structure to the semi-short stalk soybean Hefeng 42. (1) With the density increasing, Hefeng42 showed its leaf area,dry matter weight, No. of pod, No. of seed of per plant decreased, ontogenesis change for the worse,lodging was very heavy; but population dry matter weight, LAI, No. of pod, No. of seed and yield increasing under the given scope. (2) The optimum density of Hefeng 42 was 45plant/m2, the LAI of full-bloom stage and full-seed stage separately was 4.82 and 1.70, the dry matter weigth separately was 396.0g/m2 and 324.0g/m2, No. of seed per plant was 47.1, the yield was 3578.3kg/ha, the yield increased 18.3% than the ridge farming.更多还原