毛果青冈1年生苗各器官干物质生产分配及相关关系

Dry matter distribution in one-year-old seedling organs of Cyclobalanopsis pachyloma and their relationships

通过播种育苗,研究毛果青冈Cyclobalanopsis pachyloma1年生苗各器官干物质生产分配的变化规律。经定期测定和回归分析,并拟合苗木各器官干物质生产分配及相关关系和异速生长的数学模型,结果表明:苗木干物质的生产分配在出苗期、生长初期和生长盛期末及生长后期以根为主,在生长盛期以叶为主;茎在生长盛期未分配量较多但在整个生长期其分配量均小于根和叶;苗木各器官干物质生产分配与苗木地径、苗高的生长存在着极显著的相关关系;拟合的数学模型效果好,可用来估测和分析毛果青冈1年生苗在各生长时期各器官的干物质生产分配量。

The mutative pattern of dry matter distribution in different organs （including leaf, stem and root） of one- year-old seedling of Cyclobalanopsis pachyloma was studied by raising seedlings from 2002 to 2003. Through periodic measurement and regression analysis, the mathematical model of dry matter distribution, the interrelationships and the different growth speed were modified. The results showed that the dry matter distribution were mainly in roots during the germinating stage, the initial growth stage, the end of growth peak stage and the late growth stage. During the peak growth stage, the major proportional dry matter distribution was to leaves. The proportion of dry matter distribution in the end of peak growth in stem was more, while less than those of roots and leaves in the entire seasons. The dry matter distribution in different organs seems to be linked to the growth of the seedling＇s ground diameter and stock high. The mathematical model can be used to estimate and analyze dry matter distribution of one-year-old seedling of Cyclobalanopsis pachyloma in different growth periods. [ Ch, 1 fig. 4 tab. 11 ref.]