摘要
本文运用"森林土壤定位研究方法"对东北林业大学帽儿山实验林场老山人工林实验站16林班的天然次生白桦林和蒙古栎林森林土壤碳密度及相关问题进行。其目的为提高森林生态系统森林土壤碳库贮碳量提供参考。研究结果说明,两种林龄、四种林分类型的森林土壤碳密度有显著差异。蒙古栎中龄林、幼龄林土壤碳密度最多,均好于白桦林中幼林土壤碳密度。以土壤自然状态发生层为依据,划分为L层、F层、H层和A层,并以每层碳密度大小排序,A层> H层> F层> L层,其中A层碳密度最大,L层最小,这些土壤层构成了森林土壤碳库的基本结构,是贮碳分室。在研究中发现不同坡位的地形土壤对土壤碳密度有较大影响。以碳密度大小排序,为坡下>坡中>坡上,差异显著。不同林龄、不同林分类型的土壤碳密度与土层垂直深度呈函数指数相关,与碳含量呈线型相关关系,两条曲线呈相悖分布。
In order to enhance ecological function of forest ecosystem and provide a reference about soil carbon storage, using forest soil localization method, we studied the soil density and relative problems of natural secondary birch forest and oak forest in Northeast Forestry University Laoshan Forest Experiment Station, class 16. The results showed that forest soil density varied remarkably between two forest ages and four forest types. The soil carbon density in middle aged and young aged Quercus mongolica forest is the highest, which is better than that of young forest of Betula platyphylla. Based on soil genetic layers, it can be divided into L layer, F layer, H layer and A layer, and the order according to carbon density is: A > H > F > L. A layer is the highest and the L layer is the lowest among the experimental. These soil layers constitute forest soil carbon pool, and they are carbon storage compartments. In this study, we found soil carbon density was influenced by slope position, in an order: lower slope> middle slope > upper slope. The soil carbon density and soil vertical depth of different forest age and different stand types are related to the function index, and there is a linear correlation with carbon content, and the two curves are inconsistent.
引文
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