| 不同抚育强度对辽东栎林幼苗更新的影响 |
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| 引用本文： | 邓磊, 张文辉﹡ 何景峰 范中兴.不同抚育强度对辽东栎林幼苗更新的影响[J].西北林学院学报,2007,22(6):1-5. |
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| 作者姓名： | 邓磊 张文辉﹡ 何景峰 范中兴 |
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| 作者单位： | (1.西北农林科技大学生命科学学院 陕西 杨凌 712100; 2.西北农林科技大学西部环境与生态教育部重点实验室 陕西 杨凌 712100; 3.延安市黄龙山林业局 陕西 黄龙 715700) |
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| 摘 要： | 为说明不同抚育强度对黄土高原南部辽东栎林幼苗更新的影响，本文以黄龙山林区蔡家川林场辽东栎群落为研究对象，未采伐为对照，对经过5年恢复后，皆伐、间伐30%、间伐15%三种抚育强度的辽东栎林地，实生和萌生幼苗生长情况进行了调查。结果表明:不同抚育强度后的实生、萌生幼苗数量、幼苗生长状况、林地生态指标均与未采伐林地有差异；经过间伐30%的林地，其幼苗个体平均基径、高度、冠幅、叶面积、土壤养分、水分等指标均有显著增加；间伐15%林地上述指标均有增加；皆伐后的林地相对未采伐林地，萌生苗数量增加，实生苗数量减少，土壤养分、水分等指标降低。间伐与皆伐措施后比较，间伐措施的林地辽东栎实生幼苗数量多，个体发育良好，土壤养分水分相对较高；皆伐措施的辽东栎建群种萌生幼苗数量多，但土壤水分养分下降。未来该地区辽东栎林经营管理中，应以近自然抚育为主，尽量减少对灌草层破坏，完善群落复层结构；间伐强度拟定为30%，尽量间伐劣质木、病虫木，促进群落向异龄方向发展。
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| 关 键 词： | 抚育强度 更新 辽东栎林 幼苗 |
Effects of Different Tending Intensity on Seedling Regeneration|of Quercus liaotungensis| DENG Lei1,2 ZhANG Wen-hui2 HE Jing-feng2 FAN Zhong-xing3 |
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| Institution: | (1. College of Life Science, Northwest A & F University, Yangling, Shaanxi 712100, China; 2. Key Laboratory of Environment and Ecology , Ministry of Education, in West China ,Northwest A&F University, Yangling, Shaanxi 712100, China; 3. Forest Bureau of Huanglongshan in Yann City, Huanglong, Shaanxi 715700) |
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| Abstract: | This paper mainly took Quercus liaotungensis community in CaiJiachuan forest farm of Huanglong Mountain as research object to confirm the effects of different tending intensity on seedling regeneration of Quercus liaotungensis community in the south of Loess Plateau. Fixed clear cutting, 30% and 15% thinning strength as sample plots, and take the closed tending sample plot as control group. Seedlings and sprouts were investigated based on the four type plots. The results showed that: the amount of seedlings and sprouts, the growth conditions, forestland growth indexes were different among the four type plots; there were significant increase of average basal diameter, average height, average crown width, average leaf area and average soil water content and nutrient and other growth indexes after 30% thinning strength, which were also increased after 15% thinning strength; compared with the closed tending forestland, the amount of sprouts were increased while the amount of seedlings were decreased, and the soil water content and nutrient were also decreased after clear cutting; compared with the closed tending forestland, the amount of seedlings were increased, the individual development were good and the soil water content and nutrient were higher after thinning; compared with the thinning and closed tending, the amount of sprouts were increased but the soil water content and nutrient were decreased after clear cutting. In the future, Close-to-nature forest management should be mainly taken in Quercus liaotungensis community, the destruction of shrub and grass layer should be decreased and the community complex structures should be improved. The 30% thinning strength should be drafted, ungraded woods and diseased woods should be thinned in order to promote the Quercus liaotungensis community into Uneven-aged Forest. |
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| Keywords: | tending intensity regeneration Quercus liaotungensis forest seedling |
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