Using summer soybean Heihe 45,a field experiment was conducted to study the effects of planting patterns on photosynthetic capacity and grain filling characteristics of summer soybean at seed-filling stage with plant population density of 5.5×105plant·hm-2of equal row spacing treatment in five planting patterns: 30 cm(A)、40 cm(B)、60 cm(C)and wide-narrow row treatment of "15 cm+30 cm"(D)and "15 cm+15 cm+60 cm"(E).The results suggested that transpiration rate(Tr)、stomatal conductance(Gs)、net photosynthetic rate(Pn)、leaf area index(LAI)、leaf area duration(LAD)of wide-narrow row spacing treatments were higher than those of e-qual row spacing treatments increased by 16.92％～72.22％,12.50％～69.23％,7.73％～34.80％,1.13％～33.88％,5.87％～47.70％.The average of grain phase accumulation、seed filling rate and seed filling duration of wide-narrow row spacing treatments were also higher than that of equal row spacing treatments.The yield of wide-narrow row spacing treatments were higher than that of equal row spacing treatments,the average yield of wide-narrow row spacing treatments was 24.51％higher than that of equal row spacing treatments.Therefore,the planting pattern of wide-narrow row spacing is one of the best cultivation patterns to improve yield increased for summer soybean.%选用黑河45号大豆为试验材料,在5.5×105株·hm-2密度下,设置等行距:30 cm(A)、40 cm(B)、60 cm(C)和宽窄行:"15 cm+30 cm"(D)、"15 cm+15 cm+60 cm"(E)5种种植方式处理,研究不同种植方式下夏大豆鼓粒期叶片光合能力及籽粒灌浆特性.结果表明,宽窄行处理的蒸腾速率(Tr)、气孔导度(Gs)、净光合速率(Pn)、叶面积指数(LAI)、光合势(LAD)比等行距处理分别增加16.92％～72.22％,12.50％～69.23％,7.73％～34.80％,1.13％～33.88％,5.87％～47.70％.宽窄行处理的籽粒阶段积累量、灌浆速率、灌浆持续时间平均值也高于等行距处理平均值.宽窄行处理的产量均高于等行距处理,宽窄行处理的平均产量比等行距处理的平均值增产24.51％.因此,宽窄行是促进复播大豆产量提高的最佳种植方式之一.
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