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本试验是在苹果生长发育不同时期，用１４ＣＯ２标记不同品种植株上的单叶、单枝、单位枝和整株，于固定时间（７２小时）取样，测定比放射强度方法。试验结果看出，碳素同化物在年周期中，表现出按局部调节，多源竞争，均势扩散，向下优势的顺序分配习性。植株碳素营养分配有代谢旺盛的两极竞争、主干贮备和局部扩散三种形式。丰产稳产植株在分配上，不同时期有稳定的自留、贮藏、和竞争势的合理指标。各品种有其特有的分配习性，决定着大小年、成花难易和果实发育的特征，这些特性是解决大小年、促进成花、提高果实品质等技术措施的依据。
This experiment is in different periods of apple growth and development, 14CO2 labeled different varieties of plants on the single leaf, single branch, unit branches and the whole plant, at a fixed time (72 hours) sampling, determination of specific radiation intensity method. The experimental results show that the carbon assimilates show the order of allocation according to local regulation, multi-source competition, even-power diffusion and downward advantage in the annual cycle. The distribution of plant carbon nutrition has the bipolar competition with strong metabolism, the main reserve and the local diffusion in three forms. Stable and stable yield in the distribution, at different periods have a stable retention, storage, and competitive potential of a reasonable indicator. Each variety has its own unique distribution habits, determines the size of the year, the flower difficult and the characteristics of fruit development, these characteristics is to solve the size of the year, to promote flowering and improve the quality of fruits and other technical measures based on.