%0 Journal Article
%A CHEN Fu-Yuan
%A LI Xiang
%A MU Li-Qiang
%A ZHU Meng-Ting
%A LIU Wan-Sheng
%T Intraspecific and Interspecific Competition of <i>Quercus mongolica</i> Forest
%D 2020
%R 10.7525/j.issn.1673-5102.2020.04.009
%J Bulletin of Botanical Research
%P 552-558
%V 40
%N 4
%X <i>Quercus mongolica</i> forest is one of the typical forest types in Northeast China. The Hegyi competition index was used to analyze the intraspecific and interspecific competition status of <i>Q.mongolica</i> using fixed sample circle method in a 1 hm<sup>2</sup> permanent plot of <i>Q.mongolica</i> forest in Heilongjiang Zhongyangzhan Black-Billed Capercaillie National Nature Reserve. The intraspecific and interspecific competition intensity of <i>Q.mongolica</i> accounted for 28.08% and 71.92% of the total competition intensity, respectively. Some species, includingBetula platyphylla,B.dahurica and Larix gmelinii,with big size and large quantity, gave a high competition pressure to <i>Q.mongolica</i>. The order of the intraspecific and interspecific competition intensity of <i>Q.mongolica</i> was:<i>Betula platyphylla</i> > <i>Quercus mongolica</i> > <i>Betula dahurica</i> > <i>Larix gmelini</i> > <i>Populus davidiana</i> > <i>Tilia amurensis</i> > <i>Salix raddeana</i>. The DBH of <i>Q.mongolica</i> has a power function relationship with the competition intensity of the whole stand, intraspecific and interspecific competition intensity. With the increase of the DBH of the objective trees, the three types of competition decreased. When the DBH <i>Q.mongolica</i> is less than 20 cm, the competition intensity is greater. When the DBH is greater than 20 cm, the competitive pressure on <i>Q.mongolica</i> is less and tends to stabilize. The obtained model can well predict the intraspecific and interspecific competition intensity of <i>Q.mongolica</i>.
%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2020.04.009