不同行距、密度配置对先玉335主要农艺性状及产量的影响

探讨黄淮海夏玉米适宜种植行距,采用田间试验研究了不同行距、密度对先玉335灌浆速率、产量及其他农艺性状的影响.结果表明,先玉335灌浆速率随着密度的增加呈现减少的趋势,同密度条件下行距越大灌浆速率呈下降趋势.在60 000株/hm2条件下,改变行距设置对该品种穗粒数影响不大,在75 000株/hm2条件下,随着行距的增加,该品种穗粒数下降;在同行距条件下,75 000株/hm2产量高于60 000株/hm2产量,且在50 cm和宽窄行(40+80)条件下产量最高.

Effects of Different Row Spacing and Planting Density on the Main Agronomic Characters and Yield of a Maize Variety Xianyu 335

A field test was conducted to investigate the effects of different row spacing and planting density on grain filling rate,yield and other agronomic characters of a maize variety Xianyu 335,thereby determining the optimum planting density for maize in the Huang-Huai-Hai region.The results showed that the grain filling rate of Xianyu 335 was tended to decrease with the increase of planting density,and under the same planting density,the grain filling rate decreased with the increased row spacing.Under the planting density of 60 000 plants/hm2,changing the row spacing showed little effect on the kernels per spike of Xianyu 335;under the planting density of 75 000 plants/hm2,with the increase of row spacing,the kernels per spike of Xianyu 335 decreased;and under the condition of same row spacing,the yield of Xianyu 335 under the planting density of 75 000 plants/hm2 was higher than that under the planting density of 60 000 plants/hm2.The yield of Xianyu 335 reached the highest level at the row spacing of 50 cm and (40 + 80) cm.