[1]李国雷,刘勇*,郭蓓,等.保留密度对飞播油松林下植被发育影响的研究[J].西北林学院学报,2007,22(03):105-110.
 LI Guolei,LIU Yong*,GUO Bei,et al.Effect of Reserve Density on Undergrowth Development of Aerial Seeding Pinus tabulaeformis Stands[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2007,22(03):105-110.
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保留密度对飞播油松林下植被发育影响的研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第22卷
期数:
2007年03期
页码:
105-110
栏目:
林木繁育与栽培
出版日期:
2007-06-30

文章信息/Info

Title:
Effect of Reserve Density on Undergrowth Development of Aerial Seeding Pinus tabulaeformis Stands
作者:
李国雷1刘勇1*郭蓓1徐扬1张可栋2赵双荣2
1.北京林业大学 省部共建森林培育与保护教育部重点实验室,北京 100083;2. 延庆县林业局,北京 102100
Author(s):
LI Guolei1 LIU Yong1*GUO Bei1 XU Yang1ZHANG Kedong2ZHAO Shuangrong2
1.Key Laboratory of Forest Cultivation and Conservation of Education Ministry, Beijing For. Univ., 100083, P.R. China; 2.Yanqing Forestry Bureau, Beijing, 102100, P.R. China.
关键词:
飞播林油松保留密度林下植被物种多样性
Keywords:
planeseeding stand Pinus tabulaeformis reserve density undergrowth species diversity
分类号:
S753.3
文献标志码:
A
摘要:
在北京市延庆县王家堡飞播造林基地,对9 a生飞播油松林设置4种间伐强度5 600(Ⅰ)、4 100(Ⅱ)、3 700(Ⅲ)、1 830(Ⅳ)株·hm-2的林分密度调整及对照8 000(CK)5个处理。5 a后,通过比较林下植被组成、外貌、多样性及生物量的差异,研究不同保留密度对飞播油松林植被恢复的效果。结果表明间伐改变了林下植物的生活型谱。保留密度不同,林下植被的优势种各异,灌木层优势种由中旱生物种向中生生物种更替。随林分保留密度的减小,林下植物种替代速率加快,生物量增大。运用林下植被多样性指标评价间伐效果较生物量理想。飞播油松林林下植物多样性峰值出现在郁闭度0.8~0.9,郁闭度过高或过低均不利于林下植被的发育。及时对郁闭林分进行适宜强度的间伐是实现飞播油松林可持续经营的有效途径,地位级Ⅳ、初植密度8 000株·hm-2的9 a生飞播油松幼林,密度选择4 100株·hm-2左右林下植被发育最优。
Abstract:
Four thinning intensities with the reserved densities of 5 600,4 100, 3 700 and 1 830 tree/hm2 ,and a concontrol,with reserve density of 8 000 tree/hm2 were established in the 9yearold airseeded Pinus tabulaeformis stands in of Yanqing Country, Bejing. In 2005, 5 years after thinning, the composition, abundance, diversity, and biomass of the undergrowth in the four plots were investigated and compared. The results showed that the lifeform spectrum could be affected by thinning intensity as well as latitude and altitude. Meanwhile, the composition of the dominant species varied and the mesoxerophytes tended to the mesophytes of shrub layers with the decline of the reserved density. Compared with control, both the rate of substituted species and biomass among undergrowth were accelerated by the drop of reserved density. However, too high or too low shade density was negative to the development of the undergrowth, the peak values of diversity indices appeared when the shade density was between 0.8 and 0.9. Based on the results, it was concluded that reasonable thinning intensity was benefitial to the development of the undergrowth and it could be an effective way for the sustainable use of stands. Generally, when the stand with both site class Ⅳ and high density of 8 000 trees·hm-2 grows up to 9 years old, the reasonable density should be 4 100 trees/hm2 or so by thinning.

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备注/Memo

备注/Memo:
收稿日期:20061016修回日期:20061201基金项目:国家自然科学基金“针叶人工林密度地被土壤连续体生态健康性研究”(30471380);北京市教委资助项目(JD100220648)作者简介:李国雷(1977),男,山东单县人,博士,主要研究方向是植物恢复与建设与理论与技术。*通讯作者:刘 勇(1961),男,教授,博士生导师,主要研究方向是森林培育。Email: liuyong@public3.bta.net.cn
更新日期/Last Update: 2010-05-04