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Comparative study of the stoichiometric characteristics of karst and non-karst forests in Guizhou, China 预览

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摘要 Carbon (C), nitrogen (N), and phosphorous (P) levels and their stoichiometry in plant components (leaves, branch trunks, roots) of trees in a karst forest and non-karst forest are compared. The results show that the C contents, C:N and C:P ratios of dominant species in the karst forest were lower than those in the non-karst forest, but the N and P and the N:P ratio were higher;C:N:P ratios in plant organs of trees in the karst forest were in the order of trunks>roots>branches>leaves. However, C:N:P ratio in the non-karst forest trees were trunks>branches>roots>leaves. Moreover, ratio of C:N:P in trunks was highest and lowest in leaves in both forests. In non-karst forest trees, N:P was in the order of leaves> roots>branches>trunks. There were no significant differences in the ratio of N:P in different plant components of trees in the karst forest. However, in karst and non-karst forest trees, the ratio of N:P in leaves was highest;positive correlations between N and P contents, and N and N:P ratios were observed in both karst and non-karst forests (p<0.001). Negative correlations between P and N:P ratios (p<0.05) were observed in karst forest trees, while positive correlations were observed in non-karst forest trees.
出处 《林业研究:英文版》 CAS CSCD 2019年第3期799-806,共8页 Journal of Forestry Research
基金 the National Natural Science Foundation of China (31360123) National Key Scientific Research Project (2013CB956701) Applied and Basic Research Program of Guizhou Province ([2014]200208).
作者简介 Chuanyan Zhou,chyzhou66@163.com;Shaoqi Zhou,fesqzhou@scut.edu.cn.
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