糖果兼用蔗产量性状对蔗茎产量的影响

对12个有望作为糖果兼用蔗品种推广的甘蔗品种的产量性状如株高、茎径、公顷有效茎数、蔗茎产量等进行了相关及通径分析。结果表明:株高、公顷有效茎数与蔗茎产量之间存在显著、极显著正相关,茎径与蔗茎产量呈不显著负相关。各性状之间,株高与公顷有效茎数存在不显著正相关,茎径与株高和公顷有效茎数存在负相关,其中茎径与株高之间的负相关达显著水平。在对产量的效应中,公顷有效茎数的直接效应和总贡献最大,株高次之,茎径最小。由于甘蔗用途的改变——主要用于上市销售,因而在糖果兼用蔗的选育种和生产栽培中把主要目标放在增加公顷有效茎数的同时,对植株的茎径也应给予足够的重视。为获得最大经济效益,应注意合理协调好产量三要素之间,特别是株高与茎径之间的关系。

The surgar-fruit cane yield as affected by main yield characters

Main yield characters such as stalk length, diameter, effective stalks per hectare and cane yield were analysed using the correlation and path coefficient of 12 varities both for suger and fruit use. The results showed that stalk length and effective stalks per hectare were significantly or highly significantly correlated with cane yield. And the stalk diameter was not significantly negatively correlated with cane yield. Among the characters, stalk length was not significantly positively correlated with effective stalks per hectare. Stalk diameter was slightly negatively correlated with effective stalks per hectare, and significantly negatively correlated with stalk length specially. The direct effect and total contribution of effective stalks per hectare to yield ranked the first, the stalk length and diameter ranked the second and third. Because the using type has changed, in breeding and field cultivation of sugar-fruit cane, it should be aimed at higher effective stalks, while most paid more attention to stalk diameter too. To obtain higher economic effect, coordination of three characters, seems important.