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为了检测分解地点和凋落物类型对分解的影响,采用交互分解实验分析了油松凋落叶在城市林分和城郊林分中分解时不同立地条件(城市和城郊)以及不同油松凋落叶类型(城市油松凋落物和城郊油松凋落物)对凋落物的分解速率以及N、P残留率的相对作用。结果表明:不同的立地条件对油松凋落叶分解速率有显著影响(P<0.05):城郊林分中的油松凋落叶比城市林分中分解快,说明外在环境条件对分解的影响显著;在同一林分里,凋落物类型对凋落叶分解速率也有显著影响(P<0.05):城市凋落物分解快于城郊凋落物,说明凋落物内在特性对分解的影响显著。分解地点对于N、P残留率没有显著的影响,然而凋落物类型对N、P残留率有显著影响:城郊凋落物由于具有较高的C/N以及C/P初始值,比城市凋落物更容易富集N、P。
In order to test the effect of decomposition site and litter type on the decomposition, the interactive decomposition experiment was used to analyze the effects of different litter conditions (urban and suburban) and different types of Pinus tabulaeformis litter on the decomposition of urban stand and suburban stand Urban Pinus tabulaeformis littoralis and suburban Pinus tabulaeformis litter) on the litter decomposition rate and N, P residual rate. The results showed that different site conditions had a significant effect on the decomposition rate of litter (P <0.05): litterfall decomposition in suburban forest was faster than that in urban forest, indicating that external environment had a significant effect on decomposition In the same stand, litter types also had a significant effect on the litter decomposition rate (P <0.05): litter decomposition in urban areas was faster than litterfall in suburbs, indicating that litter internal characteristics had a significant effect on decomposition. However, litter types had a significant impact on the N and P residual rates. The littoral litter in urban areas had a higher C / N and C / P initial values than the urban litter Easy to enrich N, P.