中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > Population structure, age and growth rates of conifer species and their relation to environmental variables at Malam Jabba, Swat District, Pakistan 林业研究(英文版) 2020,31 (2)
Position: Home > Articles > Population structure, age and growth rates of conifer species and their relation to environmental variables at Malam Jabba, Swat District, Pakistan Journal of Forestry Research 2020,31 (2)

Population structure, age and growth rates of conifer species and their relation to environmental variables at Malam Jabba, Swat District, Pakistan

作  者：
Arsalan;Muhammad Faheem Siddiqui;Moinuddin Ahmed;Syed Shahid Shaukat;Alamdar Hussai
单  位：
Dr. Moinuddin Ahmed Laboratory of Plant Ecology and Dendrochronology, Department of Botany, Federal Urdu University, Karachi, Pakistan;Department of Botany, Karakoram International University, Gilgit, Pakista;Department of Botany, University of Karachi, Karachi, Pakistan;Institute of Environmental Studies, University of Karachi, Karachi, Pakistan
关键词：
Dendrochronology;Environmental variables;Conifer species;Forest structure;Age classes;HIMALAYAN;DYNAMICS;FORESTS;VEGETATION;REGIO
摘  要：
This study focuses on age, growth rate and diameter distribution of pine forests in the Malam Jabba area, Swat District, Pakistan. Wood core samples were taken from twenty stands. Picea smithiana was the oldest at 234 years with a 112-cm diameter. Abies pindrow was 125 years with an 80-cm diameter while the oldest Pinus wallichiana was 122 years with 75-cm diameter. The fastest overall growth rate of 1.5 +/- 0.1 year/cm was for P. wallichiana on a west-facing aspect, while the slowest 5.8 +/- 2.6 year/cm growth was P. smithiana on an east-facing exposure. P. wallichiana and A. pindrow exhibited marked differences in growth rates over a 5-year period. The highest growth was by P. wallichiana from 1966 to 2006. A. pindrow showed less growth over the same years, such pattern simultaneously reverse from 1911 to 1965. The relationship between diameter and age, diameter and growth rate and age and growth rate were correlated. P. wallichiana and A. pindrow ages were correlated with diameter and growth rates. P. smithiana age was positive correlated with diameter. Generally, topographic and edaphic factors did not show significant correlations with growth rates, although some appreciable correlations were recorded. The growth of P. wallichiana was correlated with elevation while A. pindrow was correlated with maximum water retaining capacity. Diameter and age produced uneven size classes and many size gaps, which could be the result of anthropogenic disturbances.

相似文章

导出引用
计量
文章访问数: 13
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46