子午岭林区辽东栎、油松、柴松群落特征及其枯枝落叶层水文效应研究

Community Characteristics and Litter Hydrological Effects of Quercus Liaotungensis,Pinus Tabulaeformis,and Pinus Tabulaeformis f.Shekannesis Forests in Ziwuling Region

通过野外调查和室内分析相结合的方法,对子午岭林区辽东栎、油松、柴松3种群落的特征及其枯枝落叶层水文效应进行了研究,调查结果表明:(1)子午岭辽东栎林除局部林是与其它林木混交外,一般都是纯林;油松林和柴松林常形成以该种群为主的单优群落,但混有少量阔叶树种。(2)子午岭林区油松林物种多样性指数最大,而柴松林物种不丰富;乔木层、灌木层、草本层这3者的多样性指数呈现出由低到高的特点。(3)子午岭辽东栎林、油松林、柴松林的枯落物蓄积量分别为32.65,48.95和47.30t/hm2。(4)辽东栎、油松、柴松枯枝落叶最大拦蓄量分别为50.93,70.15和61.68t/hm2。

Based on the investigation and analysis of plot data,the community characteristics and litter hydrological effects of Quercus liaotungensis,Pinus tabulaeformis,and Pinus tabulaeformis f.shekannesis forests in Ziwuling region were studied preliminarily. Results from the study show that （1） the Quercus liaotungensis forest in Ziwuling Mountains is the single-priority community in general. The Pinus tabulaeformis forest and Pinus tabulaeformis f.shekannesis forest in Ziwuling Mountains are the single-priority community mixing with a small number of broad-leaved species. （2） The Pinus tabulaeformis species are abundant and evenly distributed,Pinus tabulaeformis f.shekannesis forest has the smallest species,and the plant diversity indexes of tree layer,shrub layer,and herbage layer are in the order from low to high. （3） The litter of Quercus liaotungensis forest accounted to 32.65 t/hm2; the litter of Pinus tabulaeformis forest,48.95 t/hm2; and the litter of Pinus tabulaeformis f.shekannesis forest,47.30 t/hm2. （4） The maximum water holding capabilities of the Quercus liaotungensis litter,Pinus tabulaeformis litter,and Pinus tabulaeformis f.shekannesis litter are 50.93,70.15,and 61.68 t/hm2,respectively.