| 近天然落叶松-云冷杉林树种竞争关系的变化 |
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| 引用本文： | 沈琛琛,雷相东,刘殿仁,林召忠.近天然落叶松-云冷杉林树种竞争关系的变化[J].林业科技开发,2011,25(4):12-17. |
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| 作者姓名： | 沈琛琛 雷相东 刘殿仁 林召忠 |
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| 作者单位： | 1. 中国林业科学研究院资源信息研究所,北京,100091
2. 吉林省汪清县林业局 |
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| 基金项目： | 林业公益性行业科研专项(编号:201004002) |
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| 摘 要： | 以4块落叶松-云冷杉间伐实验样地为对象,采用6个与距离无关的竞争指标,研究林木竞争状态在20年间(1986～2006年)的变化及间伐的影响。结果表明,落叶松为主要树种,竞争能力最强,其竞争压力主要来自种内,红松和其他阔叶树的竞争能力有逐渐增强的趋势,因此,随着林分生长,落叶松的竞争主体地位受到了来自其他针叶树云冷杉、红松及阔叶树种的威胁。该林分竞争关系近期相对稳定,但有从落叶松-云冷杉林向阔叶树及红松林发展的趋势。间伐影响种间竞争关系和林分平均竞争水平,影响程度与间伐对象的选择与间伐强度有关。林分竞争水平随间伐强度的增加而降低,但会逐渐恢复。
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| 关 键 词： | 近天然林 与距离无关的竞争指标 间伐 竞争 |
Tree competitive states and trends in semi-natural mixed forest of Larch-Spruce |
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| SHEN Chen-chen,LEI Xiang-dong,LIU Dian-ren,LIN Zhao-zhong.Tree competitive states and trends in semi-natural mixed forest of Larch-Spruce[J].China Forestry Science and Technology,2011,25(4):12-17. |
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| Authors: | SHEN Chen-chen LEI Xiang-dong LIU Dian-ren LIN Zhao-zhong |
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| Institution: | SHEN Chen-chen,LEI Xiang-dong,LIU Dian-ren,LIN Zhao-zhong Research Institute of Forest Resource Information Techniques,Forestry Academic of China,Beijing 100091,China |
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| Abstract: | The tree competition states and changes were examined in the four plots(0.25 hm2 for each) of semi-natural mixed forest of larch-spruce-fir in Jingouling forest farm,Wangqing forestry bureau,Jilin Province.The plots with thinning intensity by 20%,30% and 40% were observed from 1986 to 2006.Six distance-independent competition indices were introduced to show the competition states and the influences of thinning on the the states.The results indicated that larch was the main and the most powerful species in c... |
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| Keywords: | semi-natural forest distance-independent competition indices thinning competition |
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