Abstract:

In order to explore the branch module features of Juglans regia L. f. luodianense Liu et Xu in different slope positions, the branch module situation of J. regia L. f. luodianense in middle slope position, down slope position and nonslope position was investigated and analyzed by method of Harpers plant module theory. The results showed that:(1) J. regia L. f. luodianense had more branches and better growth in down slope position;(2)The order of spatial expanding capacity of J. regia L. f. luodianense showed as nonslope position> middle slope position>down slope position. The use level of light and carbon dioxide of J. regia L. f. luodianense somewhat depended on the length of its first class branches;(3)The order of branching capability of J. regia L. f. luodianense showed as nonslope position> middle slope position>down slope position, and the branching capability of its branches showed as the third class branches>the second class branches>the first class branches;(4)The transportation of moisture and nutrient between the first class branches and the second class branches had the greatest effect on growth and development of J. regia L. f. luodianense．

Key words: Juglans regia L . f . luodianense Liu et Xu, slope position, branch module, karst