八角开花结果与养分需求特性

综述了八角落花落果的主要原因及每年开花结果次数和果熟时间，归纳其主要营养元素在八角叶、花、果等器官中的分布特征及体内养分平衡特征方面的国内研究进展，对八角叶片中各种营养元素的适宜含量进行讨论，认为很有必要从物候动态变化层面进行研究，以期能观测到叶片中各种营养元素含量随物候变化的规律，对八角施肥作业更具有指导意义。

Characteristics of Flowering Fruiting and Nutrient Requirement of Illicium verum

The major reasons for flower and fruit dropping of IUicium verum plants, the times of flowering and fruiting each year, and the period of time for fruit maturity were reviewed in this paper. The domestic research ad- vances in the distribution characteristics of the main nutrition elements in the organs of leaf, flower and fruit, and the characteristics of internal nutrient balance of I. verum plants were concluded. The optimum content of nutrition elements in the leaves of I. verum was discussed. It was proposed that it would be essential to study the dynamic change of the plant nutrition along with the phenology, in order to find out the law how the nutrition elements in the leaves would vary with the phonological change, which will be more significant to guide the fertilization practice.