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《Guangdong Forestry Science and Technology》 2011-06
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Analysis of Mineral Nutrition of Ancient Cinnamomum camphor with Different Growth Potential

Zhang Lijuan1 Yang Zhimin1 He Suichao2 Liu Jun1(1.Turf Engineering and Technology Center,Nanjing Agricultural University,Nanjing Jiangsu,210095; 2.Forestry Bureau,Ningxiang,Hunan)  
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 increasingly 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 between different seasons,while significant but small differences in the contents of the others.The differences between 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 increased,while the others decreased,and the ratio of N,P and K was imbalanced seriously.By principal component 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.
【Fund】: 国家质检公益性行业科研专项(项目编号:200810412)资助
【CateGory Index】: S792.23
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