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主要对长白山北坡溪流大木质物残体现存量进行了调查和研究,包括两段河道内所有大木质物残体的基径、顶径、长度、腐烂级,并在其中一段对树种尽可能进行了鉴别,以分析河岸带植被与溪流大木质物残体的关系。在调查的红松阔叶林植被带内4500 m长河道内,共发现溪流倒木425株,分属于17个树种;其中III、IV级腐烂占相当大的比重,与林地倒木II、III级腐烂占优有所不同,其原因可能与分解环境的不同有关。两段河道溪流大木质物残体的现存量为1.733 m3/100m、 10.83m3/hm2和1.709 m3/100m、 21.36 m3/hm2。处于III、IV级腐烂的溪流大木质物残体所占比重较大,与在森林中情况有所差异,可能与分解环境的不同有关。溪流大木质物残体和林地活立木的个体数量的径级分布基本上为反J型,而它们材积的径级分布均为典型的J型。溪流大木质物残体的树种组成和不同树种的材积与河岸带植被密切相关,但存在差异,分析这种差异可以深入了解河岸带植被动态。图1表4参18。
Mainly on the northern slope of Changbai Mountain stream woody debris remaining stocks were investigated and studied, including the two sections of the river wood in all the large wood residues of the base diameter, top diameter, length, decay grade, and in one of the tree species as much as possible The identification was conducted to analyze the relationship between riparian vegetation and large woody debris in streams. In the 4500-m-long channel in the surveyed Korean pine broad-leaved forest belt, a total of 425 trees were found, accounting for 17 tree species. Among them, Grade III and IV decay accounted for a considerable proportion, The reason is different, the reason may be related to the decomposition of the environment. The existing stock of large woody debris in two sections of river streams is 1.733 m3 / 100m, 10.83m3 / hm2 and 1.709 m3 / 100m, 21.36 m3 / hm2 respectively. The proportion of large woody debris in streams III and IV decayed is relatively large, which is different from that in the forest and may be related to the decomposition of the environment. The diameter distribution of individuals with large woody debris and standing woodland in the streams is basically anti-J type, and their diameter distributions are typical J type. The tree species composition of large woody debris and the volume of different tree species are closely related to the riparian vegetation, but there are differences. Analyzing this difference can deeply understand the dynamics of riparian vegetation. Figure 1 Table 4 Reference 18.