糖能兼用甘蔗品种(系)对不同播种密度的响应

The Responses of Different Sowing Densities on Sugar and Energy Cane Clones

为了解不同糖能兼用甘蔗品种(系)在不同播种密度条件下的生产性能表现,为今后进行能源甘蔗品种推广应用提供参考。对来自国内外的5个糖能兼用甘蔗品种(系)在5种不同播种密度下进行1年新植1年宿根种性比较试验。结果表明,不同播种密度水平之间的平均生物产量、蔗茎产量、蔗糖产量和总可发酵糖产量差异均不显著;B1、B8、GT26、GT97/69、GT22等品种(系)之间在生物产量、蔗茎产量、蔗糖产量、总可发酵糖产量和株高、茎径、有效茎数等产量构成因子方面的差异达到极显著水平;GT97/69、B1对播种密度反应比较敏感,其最适宜的播种量分别是每公顷12万芽和13.5万芽,其他品种反应则不敏感。甘蔗的产量主要由品种(系)的种性决定,不同品种对不同的播种密度反应不同,甘蔗新品种在推广应用之前应在不同栽培管理水平和环境条件下进行播种密度试验,确定比较合理的单位面积播种量。

The aim was to know the product traits on different sowing density of varieties（clones）.The results were used to provide the reference for energy sugarcane extension and application.The experiments were carried out the comparative trials on five sowing density of five varieties for one-plant and one ratoon crop.There were no significant difference in levels of biological yield,cane yield,sugar yield and total fermentable sugar yield by difference sowing density;and the differences have reached a vary significant level among B1,B8,GT26,GT97/69,GT22 on the biological yield,cane yield,sugar yield and total fermentable sugar yield among yield components on plant height,stem diameter and number of millable stalks;GT97/69 and B1 were more sensitive to sowing density,the best sowing density was 12000 plants/hm 2 and 13500 plants/hm 2,other varieties were insensitive of sowing density.Variety was the most important factor in determining of sugarcane yield,which was responded differently to different sowing density.Before the extension and application,the comparison trials for different sowing density on the new sugarcane varieties were conducted to found the best sowing density.