联创808在黄淮海地区适宜种植密度研究

Studies on the Suitable Planting Density of Lantron 808 in Huanghuaihai Area

以玉米新品种联创808为试验材料,采用随机区组试验,通过设置每公顷6万、7.5万、9万、10.5万、12万株5个种植密度,于2014和2015年在黄淮海地区进行密度多点试验,分别对不同密度下产量的差异性以及倒伏情况进行研究,并采用Francis和Kannenberg模型分析法分析不同密度下产量的稳定性。结果表明,2014年试验中,不同密度对产量的影响不显著,密度7.5万、9万株/hm^2时产量的变异系数较小,属于高产稳定密度;而2015年不同密度对产量的影响极显著,密度6万、7.5万、9万株/hm^2,属于高产稳定密度。密度与两年的平均倒伏率呈极显著正相关,倒伏随着密度的增加而增加。综合考虑品种的丰产性、稳产性以及倒伏发生情况,联创808在黄淮海地区的适宜种植密度为7.5万株/hm^2。

A randomized block design experiment was conducted with maize variety Lantron 808,and five plant density(6.0,7.5,9.0,10.5,12.0×10^4 plants/hm^2)treatments were set.Multi-point tests of the experiment were conducted in the Huanghuaihai area in 2014 and 2015.The differences in yield and lodging at different densities were studied separately,and the stability of yield was analyzed by Francis and Kannenberg model.The results showed that the effect of different densities on yield was not significant in 2014.The variation coefficient of the yield was small when the densities were 7.5×10^4 plants/hm^2 and 9.0×10^4 plants/hm^2,which were the stable densities for high-yield.But the effect of different densities on yield was significant in 2015,the densities of 6.0×10^4,7.5×10^4 and 9.0×10^4 plants/hm^2 were the stable densities for high-yield.The density was positively correlated with the average lodging rate of two years,and the lodging was increased with the increase of density.The high yield,stable yield and lodging of maize variety were considered together,the suitable planting density for Lantron 808 was 7.5×10^4 plants/hm^2 in Huanghuaihai area.