引言有人提出碳水化合物是柑桔花芽形成的限定因子(Ogaki等,1963),在另外一些果树中也是如此(Harley等,1942)。作为支持这一理论的主要证据是环割处理能增加花芽形成的数量(Cohen,1981),因为大家知道环割能使环割后的枝积累碳水化合物。据估计,碳水化合物在花芽分化的营养转移假说中也起着重要调节作用,其理论是最近由Sacks和他的合作者所提出的。另一方面,赤霉素水平的 Introduction It was suggested that carbohydrates are a limiting factor in flower bud formation in citrus (Ogaki et al., 1963), as are other fruit trees (Harley et al., 1942). The main evidence in support of this theory is that ring mowing increases the number of flower buds (Cohen, 1981), because it is known that ring mowing can accumulate carbohydrates on ring mowing branches. It is estimated that carbohydrates also play an important regulatory role in the nutrient transfer hypothesis of floral bud differentiation, a theory that was recently proposed by Sacks and his collaborators. On the other hand, gibberellin levels