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以亚有限结荚习性大豆吉育60为材料,在田间研究了4种不同施氮量(0、60、120、180 kg.hm-2)对单株荚数、粒数、腔数和结实率垂直分布的影响。结果表明:主茎各节的荚数、总荚腔数、粒数增幅因施氮量而异,适宜施氮量处理(120 kg.hm-2)15～19节的荚数、总荚腔数和粒数较不施氮对照增幅明显大于10～14节和5～9节,15～19节、10～14节、5～9节的粒数分别增加6.51、1.39、2.06粒,产量(5 264.87 kg.hm-2)增加20.22%;各处理的荚空腔数在主茎上由多至少顺序为5～9节>10～14节>15～19节,施氮对荚空腔数的分布影响小、对单株总结实率无影响;施氮明显增加5～13节间长度,并增加基部节间粗度。适量氮肥主要提高了大豆群体上部的结荚能力,从而增加总荚腔数和粒数。
In this study, four different nitrogen rates (0, 60, 120, 180 kg · hm-2) were used to study the effects of pod number, grain number, number of cavities, Effect of vertical distribution. The results showed that: the pod number, the total number of pods and the increase of the number of grains in the main stems varied with the amount of nitrogen applied, and the suitable pod numbers for pods (15 ~ 19 cm) Compared with the control, the increase of number and grain number was significantly larger than those of 10-14 and 5-9. The grain number of 15-19, 10-14 and 5-9 increased by 6.51, 1.39 and 2.06 respectively, 5 264.87 kg.hm-2) increased by 20.22%. The number of pods in each treatment ranged from at least 5 ~ 9cases> 10 ~ 14cases> 15 ~ Of the distribution of small impact on the total solid rate of plants had no effect; nitrogen application significantly increased the length of 5 to 13 internodes, and increase the thickness of the basal internode. Appropriate amounts of nitrogen fertilizer mainly increased the upper part of soybean population podding ability, thereby increasing the total number of pods and grains.