赤霉素和多效唑对油茶幼株生长的影响

摘要

In order to research growth characters of Camellia oleifera seedlings,C.oleifera seedlings were regulated by different concentrations of GA and PP333.The results indicate that exogenous GA can promote shoot germinating and significantly promote spring shoot growing,the 200 mg · L-1 treatment has the best effect on spring shoot growing,and the 150 mg · L-1 treatment has obvious effect on growth of new leaves.But GA has no significant influence on diameter of spring shoots and leaf thickness.PP333 can significant inhibit new shoot germinating and growing,but has a significant promotion influence on growth of spring shoot diameter and leaf thickness,and 500 mg · L-1 PP333 is the best treatment.%为了探究油茶幼树的生长特性,用不同浓度的赤霉素和多效唑分别处理油茶幼株,对油茶树体进行了化学调控.结果表明:外源赤霉素能促进油茶抽梢,并能显著促进油茶春梢的伸长,且以浓度为200 mg·L-1的赤霉素对油茶春梢伸长的促进效果为最好,而浓度为150 mg·L-1的赤霉素对油茶新生叶片的生长有促进作用,但赤霉素对油茶春梢直径和叶片厚度的影响均不显著；多效唑能强烈抑制油茶抽梢和新梢的伸长,但对油茶春梢增粗和叶片增厚的影响较显著,且以浓度为500 mg·L-1的多效唑对油茶春梢增粗和叶片增厚的促进效果为最好.