Relative Growth Rate and Biomass Allocation Among Some Important Commonly Planted Trees in an Irrigated Urban Landscape

IF 1.2 4区农林科学 Q3 FORESTRY

Journal of Sustainable Forestry Pub Date : 2021-08-27 DOI:10.1080/10549811.2021.1969251

Rida Ayub, Z. Siddiq, M. U. Hayyat, T. Iftikhar

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Abstract

ABSTRACT The present study was conducted to estimate relative growth rates (RGR) and above- and below-ground biomass stocks of 10 tree species commonly planted in arid irrigated urban areas in Pakistan. Saplings were grown in the Botanic Garden of Government College University, Lahore. The growth was monitored for a year and a half and then trees were destructively harvested to assess biomass stocks. The mean relative growth rate ranged from 0.03 ± 0.021 cm cm−1 day−1 to 0.28 ± 0.016 cm cm−1 day−1. The mean above-ground oven dried biomass ranged from 0.51 ± 0.071 kg to 28.34 ± 3.746 kg, while the mean below-ground biomass ranged from 0.12 ± 0.053 kg to 7.35 ± 0.605 kg. Further, we found that the RGR was significantly and positively correlated with above-ground biomass, below-ground biomass, and root-shoot ratios. Across all 80 individuals of the studied species, diameter at tree base was significantly and positively related to whole tree biomass (R2 = 0.80). In this study we have developed the species-specific equations to estimate biomass in young urban species. Such data will be helpful for plantation decision makers, who may need to select the species according to relative growth rates and biomass allocation.

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灌溉城市景观中几种重要常栽树的相对生长率和生物量分配

摘要本研究旨在估算巴基斯坦干旱灌溉城市地区常见的10种树木的相对生长率（RGR）和地上和地下生物量存量。树苗生长在拉合尔政府学院大学植物园。对生长进行了一年半的监测，然后对树木进行破坏性采伐，以评估生物量存量。平均相对生长率范围为0.03±0.021 cm cm−1天−1至0.28±0.016 cm cm−一天−1。平均地上烘干生物量在0.51±0.071 kg至28.34±3.746 kg之间，而平均地下生物量在0.12±0.053 kg至7.35±0.605 kg之间。此外，我们发现RGR与地上生物量、地下生物量和根冠比显著正相关。在所研究物种的所有80个个体中，树基直径与整棵树的生物量呈显著正相关（R2=0.80）。在本研究中，我们开发了物种特异性方程来估计年轻城市物种的生物量。这些数据将有助于种植园决策者，他们可能需要根据相对生长率和生物量分配来选择物种。

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来源期刊

Journal of Sustainable Forestry Social Sciences-Geography, Planning and Development

CiteScore

3.90

自引率

12.50%

发文量

期刊介绍： Journal of Sustainable Forestry publishes peer-reviewed, original research on forest science. While the emphasis is on sustainable use of forest products and services, the journal covers a wide range of topics from the underlying biology and ecology of forests to the social, economic and policy aspects of forestry. Short communications and review papers that provide a clear theoretical, conceptual or methodological contribution to the existing literature are also included in the journal. Common topics covered in the Journal of Sustainable Forestry include: • Ecology, management, recreation, restoration and silvicultural systems of all forest types, including urban forests • All aspects of forest biology, including ecophysiology, entomology, pathology, genetics, tree breeding, and biotechnology • Wood properties, forest biomass, bioenergy, and carbon sequestration • Simulation modeling, inventory, quantitative methods, and remote sensing • Environmental pollution, fire and climate change impacts, and adaptation and mitigation in forests • Forest engineering, economics, human dimensions, natural resource policy, and planning Journal of Sustainable Forestry provides an international forum for dialogue between research scientists, forest managers, economists and policy and decision makers who share the common vision of the sustainable use of natural resources.