Effects of nitrogen deposition and management intensity on stoichiometry of leaf litter in Moso bamboo forest.

doi:10.13287/j.1001-9332.201802.003

Abstract

Abstract: In this study, a field experiment was conducted to estimate the effects of simulated nitrogen (N) deposition (low-N: 30 kg N·hm^-2·a^-1, moderate-N: 60 kg N·hm^-2·a^-1, high-N: 90 kg N·hm^-2·a^-1) on ecological stoichiometry of leaf litter in Moso bamboo forest under conventional management (CM) and intensive management (IM) practices. The results showed that compared with CM, IM significantly increased C, N and P concentrations of leaf litter by 9.3%, 32.4% and 22.7%, respectively, but significantly decreased C:N, C:P and N:P ratios by 17.4%, 54.3% and 44.6%, respectively. In CM Moso bamboo plots, low- and moderate-N deposition significantly increased C, N and P concentrations of leaf litter but decreased C:N, C:P and N:P, high-N deposition significantly increased C, N concentrations, C:P and N:P, but decreased P concentration. In IM Moso bamboo plots, low-N deposition significantly increased P concentration but decreased C concentrations, C:P and N:P, moderate-N deposition significantly increased N and P concentrations but decreased C concentration, C:N, C:P and N:P, high-N deposition significantly increased C:N, C:P and N:P but decreased P concentration. The interaction of management intensity and N deposition significantly influenced stoichiometry of leaf litter, except for C:N. The P concentration of leaf litter was significantly correlated with P concentration in soils.

Key words: nitrogen deposition, intensive management., stoichiometry, Moso bamboo, conventional management

YAO Jun-neng, LYU Jian-hua, YU Wei-liang, ZHANG Jun-bo, LEI Zhao-feng, LI Quan, SONG Xin-zhang. Effects of nitrogen deposition and management intensity on stoichiometry of leaf litter in Moso bamboo forest.[J]. Chinese Journal of Applied Ecology, 2018, 29(2): 467-473.

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