Ecological Stoichiometry of N, P and K in Leaves and Branches of Different Aged Disanthus cercidifolius var. longipes

In August 2021, leaves and branches were collected from 1-, 3-, 5-, 7-year Disanthus cercidifolius var. longipes in Qianjiangyuan National Forest Park in Kaihua county, Zhejiang province. The content of N, P and K in leaves and branches collected was analyzed. The results showed that the content of N, P, K and K:P was leaves>branches. The N, P and K content in leaves and branches had negative relation with age. Of different aged D. cidifolius var. longipes, the values of N:P were 20.62-27.61, of N:K 4.07-5.17, and of K:P, 4.30-5.79. N:P and N:K in leaves and branches had positive relation with age, while K:P decreased first and then increased.