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李树是我省栽培果树中适应性最强的树种之一。花芽分化是李树周年生命活动中一个重要的物候期,是开花结果的基础。研究李树的花芽分化,掌握其规律,为制定丰产栽培技术措施提供理论依据。通过本试验看出,哈尔滨地区李树花芽形态分化始期为六月下旬至七月上旬,集中分化期为七月上旬至八月上旬。花芽形态分化期与枝条停长期有关,李子花束状果枝停长后四至五周开始花芽形态分化。初花期后八至九周开始花芽形态分化。从花芽形态分化始期到雌蕊形成所需的时间,绥棱红为四十天左右。花芽分化要在一定的物质基础上,需要一定的环境条件,李树达到花芽形态分化始期,前10天前的平均气温为22～23℃,前一个月间的平均日照时数为10小时以上,需要450～570℃的有效积温。
Li Shu is one of the most adaptable tree species in our province. Flower bud differentiation is an important phenophase in the life activities of the plum tree and is the basis of the flowering result. To study the flower bud differentiation, to grasp the law, provide a theoretical basis for the development of high yield cultivation techniques and measures. Through this experiment, it can be seen from the beginning of June to the beginning of July that the flower bud differentiation of plum tree in Harbin started from early July to early August. Differentiation of flower buds was related to long-term shoots suspension. Flower bud morphogenesis began four to five weeks after plum-shaped plum trees were suspended. Eight to nine weeks after the first flowering flower bud morphological differentiation. From the beginning of flower bud differentiation to the time required for the formation of pistils, Suiling red for about 40 days. Flower bud differentiation in a certain material basis, the need for certain environmental conditions, plum flower buds to achieve the beginning of the differentiation period, the average temperature before the first 10 days 22 ~ 23 ℃, the average sunshine hours the previous month for more than 10 hours , Need 450 ~ 570 ℃ effective accumulated temperature.