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芋艿植株地上部分的生长,要求高温和长日照,但地下球茎的形成,则要比较低的温度和较短的日照。所以,芋艿培土与球茎的生长发育关系极为密切。新芋从种芋的上端开始发生,若让其自然生长,地下球茎易露出地面,经阳光照射则球茎难以膨大,且须根也不易生长,发根少,使养份吸收受到限制。另外,子芋顶芽容易萌发,徒长分枝,
Taro plant parts of the growth of the ground, requiring high temperature and long sunshine, but the formation of underground bulbs, then the temperature is lower and shorter sunshine. Therefore, Taro earthwork and bulbs are closely related to the growth and development. New taro from the beginning of the kind of taro occurs, if allowed to grow naturally, the underground bulb easily exposed the ground, the sun is difficult to bulging bulbs, and fibrous roots are not easy to grow, hair roots less, so that nutrient absorption is limited. In addition, the sub-top bud easy to germinate, leggy branches,