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小兴安岭天然次生林不同林型下红松种源试验 被引量:2
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作者 魏志刚 夏德安 +4 位作者 王瑞琪 张洋 刘莹莹 李若林 杨传平 《植物研究》 CAS CSCD 北大核心 2021年第5期807-815,共9页
在林下间隙和斑块营造红松是促进天然次生林向阔叶红松林转变的重要经营手段。不同类型的次生林林冠下生长环境各异,对红松幼林生长与适应会产生不同的影响。本研究在小兴安岭丽林实验林场不同林型(杂木林、杨桦林和硬阔林)下开展了红... 在林下间隙和斑块营造红松是促进天然次生林向阔叶红松林转变的重要经营手段。不同类型的次生林林冠下生长环境各异,对红松幼林生长与适应会产生不同的影响。本研究在小兴安岭丽林实验林场不同林型(杂木林、杨桦林和硬阔林)下开展了红松种源试验研究,结果表明:不同林型对红松源地径、树高、当年高和保存率性状具有显著影响;不同林型下红松造林效果最好为杨桦林,其次为硬阔林,最差是杂木林;铁力种源为杨桦林和杂木林林下造林用的优良种源,汪清种源为硬阔林下优良种源。 展开更多
关键词 小兴安岭 丽林实验林场 天然次生林类型 红松 种源试验 优良种源
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Spatial connectivity and distribution of landscape type in the natural secondary forests of eastern mountainous region,northeast China——a case study of Mao'ershan region in Heilongjiang Province
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作者 李淑娟 隋玉正 +2 位作者 冯海清 王凤友 李玉文 《Journal of Forestry Research》 SCIE CAS CSCD 2004年第2期141-144,i003,共5页
Mao'ershan region is representative in the natural secondary forested region of the eastern mountainous region, northeast China. The landscape nearest neighbor index and landscape connectivity index were calculate... Mao'ershan region is representative in the natural secondary forested region of the eastern mountainous region, northeast China. The landscape nearest neighbor index and landscape connectivity index were calculated with ARC/INFO software for Mao'ershan region. The spatial distribution of the landscape of the region was analyzed. The results showed that the landscape connectivity index of non-woodland was significantly higher than that of woodland. The landscape connectivity index of natural forest was nearly equal to zero, which means its fragmentation degree is high. The nearest neighbor index of plantation was lower than that of natural forest and non-forestland. Among the man-made forests, the distance index of the coniferous mixed plantation is the lowest, and its pattern is nearly glomeration. The landscape pattern of natural forest presented nearly random distribution. Among non-forest land, the distance index of cut blank was the lowest, and its pattern was also nearly glomeration. Keywords Landscape type - Landscape pattern - Nearest neighbor index - Landscape connectivity index - Natural secondary forest - Northeast China CLC number S759.92 Document code A Foundation item: This paper was supported by the Key Project of State Department of Science Technology (2002BA515B040).Biography: LI SHu-juan (1977), female. Lecture in Ocean University of China, Qingdao 266003, P. R. China.Responsible editor: Zhu Hong 展开更多
关键词 Landscape type Landscape pattern Nearest neighbor index Landscape connectivity index Natural secondary forest Northeast China
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