[1]胡凌,商侃侃*,张庆费*,等. 密度调控对香樟人工林林木生长及空间分布的影响[J].西北林学院学报,2014,29(02):20-25.[doi:doi:10.3969/j.issn.1001-7461.2014.02.04]
 HU Ling,SHANG Kan-kan*,ZHANG Qing-fei*,et al. Effects of Density Regulation on the Growth and Spatial Distribution of Cinnamomum camphora Plantations in Shanghai[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2014,29(02):20-25.[doi:doi:10.3969/j.issn.1001-7461.2014.02.04]
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 密度调控对香樟人工林林木生长及空间分布的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第29卷
期数:
2014年02期
页码:
20-25
栏目:
出版日期:
2014-03-30

文章信息/Info

Title:
 Effects of Density Regulation on the Growth and Spatial Distribution of Cinnamomum camphora Plantations in Shanghai
文章编号:
1001-7461(2014)-02-0020-06
作者:
 胡凌12商侃侃2*张庆费3*戚裕锋4 郑思俊2
 (1.华东师范大学环境科学系,上海 200062;2.上海市园林科学研究所,上海 200232;3.上海辰山植物园,上海 201602;4.上海市宝山区林业站,上海 201901)
Author(s):
 HU Ling12 SHANG Kan-kan2* ZHANG Qing-fei3* QI Yu-feng4 ZHENG Si-jun2
 (1.Department of Environmental Science, East China Normal University, Shanghai 200062, China; 2. Shanghai Institute of Landscaping and Gardening, Shanghai 200232, China; 3. Chenshan Botanical Garden, Shanghai 201602, China; 4. Shanghai Baoshan District Forestry Station, Shanghai 201901, China)
关键词:
 香樟人工林密度调控林木分化空间格局生长过程生物量
Keywords:
Cinnamomun camphora ecological forest density regulation tree differentiation spatial distribution pattern growth process biomass
分类号:
S792.230.1
DOI:
doi:10.3969/j.issn.1001-7461.2014.02.04
文献标志码:
A
摘要:
 上海城郊人工林普遍存在林分密度高、林相结构简单、个体生长分化严重等现象,合理调控森林的密度结构成为城市森林建设亟待解决的关键问题。本研究以上海宝山区建植于2001年、初植密度为4 600株·hm-2的香樟人工林为对象,在生长3 a后将林分密度分别调控为1 000株·hm-2(P1)、1 300株·hm-2(P2)和1 600株·hm-2(P3)的3个不同样地,于2012年各设置1个50 m×50 m典型样地,细分成4个25 m×25 m样方,调查测定林木的测树因子、空间结构和树芯结构,分析林木生长过程和空间分布格局。结果表明,随着密度增加,林木枯死率升高,林木分化程度增强; P1、P2、P3样方个体最大径级分别达25.7、28.6 cm和23.9 cm,变异系数分别为0.11、0.13和0.17。在4~25 m空间尺度上,P1、P2样方个体呈随机分布,P3样方个体呈聚集分布和随机分布交替现象。各龄级林木胸径生长呈先增加后减少趋势,密度越高林木径向生长量越小,而现存生物量以P2样方最高,达17 392.21 kg·hm-2。因此,上海地区10 a左右的香樟幼林合理密度约为1 300株·hm-2,采用动态密度管理机制,使林分达到最佳生长状态。
Abstract:
 How to regulate to the reasonable density of urban forest has become a key issue in Shanghai due to the current status of high tree density, simple community structure and serious growth differentiation. The tree measurement factors, spatial structure and tree-ring structure in each 50 m×50 m plot of Cinnamomum camphora forest with different densities of 1 000 (P1), 1 300 (P2), 1 600 trees ·hm-2 (P3) in Boshan District of Shanghai were studied. These plots were planted in 2001 with density of 4 600 trees/hm2 and regulated to the designed density 3 years later. The results indicated that the death rates and tree differentiation degrees increased with the increase of tree density. The maximum diameter classes and differential coefficients in the sampling plots of P1, P2, and P3 were 25.7 cm and 0.11, 28.6 cm and 0.13, and 23.9 cm and 0.17, respectively. At the special ranges of 4-25 m scale, the distribution patterns of P1 and P2 were random, while both clump and random distributions were observed in P3. The radial growth of each DBH-size class presented an increased trend firstand then a decreased trend, and the growth was the minimum in the highest density plot. The biomass of P2 was the largest which reached to 17 392.21 kg·hm-2. Thus, the reasonable density of 10-year Cinnamomum camphora plantation was about 1 300 trees·hm-2 in Shanghai area.

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备注/Memo

备注/Memo:
 收稿日期:2013-10-28 修回日期:2013-12-11
基金项目:国家“十二五”科技支撑项目(2011BAD38B03);上海市宝山区科技发展基金项目(11-A-5)。
作者简介:胡凌,女,硕士研究生,研究方向:城市生态学。E-mail:hulingyh@foxmail.com
*通信作者:商侃侃,男,博士,研究方向:城市森林结构与功能。E-mail:shangkankan@163.com;张庆费,男,教授,研究方向:生态学。E-mail:qfzhang@126.com
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