Analysis of Mineral Nutrition of Ancient Cinnamomum camphor with Different Growth Potential
Cinnamomum camphor is a very important species for greening and beautifying in southern city. Ancient C. Camphor objectively records the social development and species change, however, its aging is increas-ingly serious. Based on nutritional deficit theory, we analyzed 12 kinds of mineral elements in leaves of ancient C. Camphor with different growth potential, in order to find the key elements caused aging and provide theory basis of aging evaluation and regeneration. Results showed that, there was no significant difference in the content of K be-tween different seasons, while significant but small differences in the contents of the others. The differences be-tween different trees were related with the grade of senescence. When dij was 5 (dij means Euclidean distance) , the tested C. Camphor could be divided into 3 grades ( I , II and Ⅲ, respectively) according to growth potential (from strong to weak) by clustering analysis. With senescence aggravating, the content of Na and Al in leaves in-creased , while the others decreased, and the ratio of N, P and K was imbalanced seriously. By principal compo-nent analysis, three main components were extracted, whose accumulative total variance contribution rate was 94.91%. The variance contribution of the first principal component was 69.25% , including P, K, Cu, Fe, Mg and B. The second principal component was N, its variance contribution was 13.45%. The variance contribution of the third principal component was 12. 21% , including Ca, Al, Zn and Mn.
ancient Cinnamomum camphorsenescencemineral nutritiongrowth potential
NETL
NSTL
万方数据
维普
