开敞度调控对阔叶红松人工天然混交林上层阔叶树的影响

Abstract

Abstract:

In this paper, the diameter and height increment, species composition and species diversity of the upper-layer broad-leaved trees were measured during 6 years period after stand structure quantitative regulation with opening degree of the under-canopy planted P. koraiensis is trees in a mixed forest of planted Pinus koraiens with natural broad-leaved trees. The results showed that the quantitative regulation of stand structure (QR) evidently promoted the diameter and height increment of upper-layer broadleaved trees (UBT). Periodic increment of UBT in various QR treatments was all higher than that in control and the increment was increased along with the elongation of QR period. The annual increment of UBT in K=1.5 and K=2.0 treatments was significantly higher than that in control. QR improved the species composition of UBT in the treated plots, the proportion of valuable hardwood species like Fraxinus mandshurica, Phellodendron amurense and Juglans mandshurica was increased, and the proportion of pioneer species like Betula platyphylla and Populus davidiana was decreased. QR increased the species richness of UBT, increased species diversity and uniform degree of UBT or no changes, decreased ecological dominance or no changes.

Key words: secondary forest, broad-leaved trees in upper-layer, opening degree regulation, growth, species diversity

CLC Number:

S718.55

Shen Hailong, Wang Long, Lin Cunxue, Cong Jian, Yang Wenhua, Zhang Peng, Zhang Qun, Fan Shaohui. Effect of Community Structure Regulation on Upper-Layer Broad-Leaved Trees in a Mixed Forest of Planted Korean Pine and Naturally-regenerated Broad-Leaved Trees[J]. Scientia Silvae Sinicae, 2014, 50(2): 22-30.

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Effect of Community Structure Regulation on Upper-Layer Broad-Leaved Trees in a Mixed Forest of Planted Korean Pine and Naturally-regenerated Broad-Leaved Trees

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