[1]李进,石晓东,高润梅,等.华北落叶松天然次生林更新及影响因素[J].森林与环境学报,2020,40(06):588-596.[doi:10.13324/j.cnki.jfcf.2020.06.004]
 LI Jin,SHI Xiaodong,GAO Runmei,et al.Regeneration and affecting factors of Larix principis-rupprechtii natural secondary forests[J].,2020,40(06):588-596.[doi:10.13324/j.cnki.jfcf.2020.06.004]
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华北落叶松天然次生林更新及影响因素()
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《森林与环境学报》[ISSN:2096-0018/CN:35-1327/S]

卷:
40卷
期数:
2020年06期
页码:
588-596
栏目:
出版日期:
2020-11-15

文章信息/Info

Title:
Regeneration and affecting factors of Larix principis-rupprechtii natural secondary forests
作者:
李进 石晓东 高润梅 李聪 张雨晴 李红月
山西农业大学林学院, 山西 晋中 030801
Author(s):
LI Jin SHI Xiaodong GAO Runmei LI Cong ZHANG Yuqing LI Hongyue
College of Forestry, Shanxi Agricultural University, Jinzhong, Shanxi 030801, China
关键词:
华北落叶松天然更新关帝山环境因子枯落物
Keywords:
Larix principis-rupprechtiinatural regenerationGuandi Mountainenvironmental factorlitter
分类号:
Q943.2
DOI:
10.13324/j.cnki.jfcf.2020.06.004
摘要:
为明确关帝山华北落叶松林的更新现状,探究环境因子对林下更新的影响作用,利用样地法调查了关帝山华北落叶松天然次生林3种林分的林下幼苗与幼树数量,通过更新密度反映其更新状况,并分析了环境因子对其林下更新的影响作用。结果表明:林下华北落叶松更新不良,幼苗幼树稀少,10个20 m×20 m的方形样地中,仅有17株幼苗,44株幼树,仅存的幼苗幼树多聚集于林缘或林窗下;林下云杉更新较好良好,10个样地中共有云杉幼苗621株,幼树630株。海拔与坡度对林下华北落叶松和云杉的更新均无显著影响;坡向显著影响林下华北落叶松的更新:阳坡和阴坡的更新密度分别为(163±51)株·hm-2和(77±35)株·hm-2;两树种的更新密度在不同林分类型之间并无显著差异;华北落叶松更新显著受林分郁闭度影响:郁闭度0.25时更新密度最大,为250株·hm-2;郁闭度>0.25时,林下更新密度随郁闭度增大而显著下降;郁闭度>0.80时,林下无更新;枯落物未分解层厚度和分层均匀度显著影响华北落叶松更新,当枯落物各层厚度为2~4 cm时,利于华北落叶松林下更新。光照、枯落物未分解层厚度和分层均匀度是影响关帝山华北落叶松林下更新的主要因素。
Abstract:
In order to clarify the regeneration status of Larix principis-rupprechtii forest in Guandi Mountain and explore the influence of environmental factors on its regeneration, the seedlings and saplings of three stands of Larix principis-rupprechtii forest were investigated by a field investigation method and the regeneration density was used to reveal the natural regeneration status. The results were as follows: Larix principis-rupprechtii was poorly regenerated, and seedlings and saplings were scarce. In the 10 square plots of 20 m×20 m, only 17 seedlings and 44 saplings were found gathered on the edges or gaps of the forest. In contrast, there were 621 seedlings and 630 saplings of Picea spp. in the 10 plots, indicating that it regenerated well. Both altitude and slope did not significantly affect the regeneration of the two tree species. The regeneration of Larix principis-rupprechtii was significantly affected by the slope aspect. The regeneration density on the sunny slope was(163±51) tree·hm-2, which was higher than that of shady slope with only(77±35) tree·hm-2. The regeneration density was not significantly different among the three stands. The regeneration of Larix principis-rupprechtii was affected by the canopy density of the stands. The maximum regeneration density was 250 tree·hm-2 in stands with a canopy density of 0.25, and the regeneration density slightly decreased as the canopy density increased. There was no regeneration when the canopy density exceeded 0.80. The regeneration of Larix principis-rupprechtii was also significantly affected by the thickness of the undecomposed litter layer and the uniformity of the thickness among the three litter layers. Larix principis-rupprechtii was prone to regenerate on plots with the thickness of each litter layer between 2-4 cm. Light and litter were the main factors affecting the regeneration of Larix principis-rupprechtii on Guandi Mountain.

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备注/Memo

备注/Memo:
收稿日期:2020-07-01;改回日期:2020-08-19。
基金项目:国家自然科学基金项目(31400536);山西省林业科技创新项目林业重点研发计划专项(LYCX201961)。
作者简介:李进(1995-),男,硕士研究生,从事森林生态学研究。Email:1114899018@qq.com。
通讯作者:石晓东(1976-),男,副教授,从事森林生态学与森林培育学研究。Email:sxdsir@163.com。
更新日期/Last Update: 1900-01-01