研究９个甘蔗品种的株高、茎径、单株茎数、锤度、公顷有效茎数５个性状间的遗传相关及其对蔗茎产量和含糖量的效应，结果表明：与蔗茎产量相关最密切，直接效应和总贡献最大的是公顷有效茎数，其次是株高，茎径第三，单株有效茎最小。对公顷含糖量的相关和总贡献以公顷有效茎 The genetic correlation among plant height, stem diameter, stem number per plant, brix, effective stem number per hectare and their effect on yield and sugar content of cane were studied. The results showed that: The yield was the most closely related, the direct effect and the total contribution of the largest number of effective stems per hectare, followed by the plant height, stem diameter third, the smallest effective stems per plant. The relevant and total contribution to the hay sugar content is in hectares effective stems