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首页> 外文期刊>Journal of Arboriculture >Carbon storage by utility-compatible trees.
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Carbon storage by utility-compatible trees.

机译：公用事业兼容树的碳储量。

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Urban trees can favourably affect factors underlying global warming by storing carbon and by reducing energy needed for cooling and heating buildings. To estimate the amount of carbon stored by smaller types of urban trees, excluding leaves and roots, standardized measurements were taken to determine wood density, wood volume, and dry weight of selected samples of Amelanchier, Malus, Pyrus calleryana and Syringa reticulata cultivars. Wood density as defined by specific weight ranged from 0.53 to 0.64 g/cm3 for all genera. Densities at two upper trunk positions were significantly different from those at the base. The wood density of Syringa reticulata was significantly less than the other genera. Regression analyses of wood weight based on height and diameter of trees up to 12 cm diameter at breast height (dbh) indicated a linear relationship in Amelanchier, but curvilinear (not linear) equations explained more of the variation in Malus and Pyrus. Smaller trees, those 2.3 to 4.9 cm dbh, typicallystored between 2.1 and 2.3 kg of carbon in trunks and branches; trees between 5.0 and 7.9 cm stored between 8.4 and 15.1 kg, and trees larger than 8.0 cm up to 11.7 cm stored between 24.5 and 37.5 kg of carbon. The narrow-crowned Pyrus calleryana 'Capital' stored considerably lower amounts of carbon than the other Pyrus calleryana cultivars. These estimates may be increased by 22% to add carbon stored in roots, according to other studies.
机译：城市树木可以通过存储碳并减少建筑制冷和供暖所需的能源，从而有利地影响全球变暖的潜在因素。为了估计较小类型的城市树木（不包括树叶和根部）的碳存储量，已进行标准化测量以确定选定的Amelanchier，Malus，Pyrus calleryana和Syringa reticulata品种样品的木材密度，木材体积和干重。对于所有属，由比重定义的木材密度在0.53至0.64 g / cm3的范围内。两个上部树干位置的密度与底部的密度显着不同。网状丁香的木材密度显着低于其他属。根据木材的高度和直径对木材重量进行的回归分析表明，乳房高度（dbh）处的直径最大为12 cm，这在Amelanchier中是线性关系，但是曲线（非线性）方程式解释了Malus和Pyrus的更多变化。较小的树木（2.3至4.9厘米dbh），通常在树干和树枝中储存2.1至2.3千克碳。 5.0至7.9厘米之间的树木储存8.4至15.1千克，大于8.0厘米至11.7厘米的树木储存24.5至37.5千克碳。狭窄的冠状梨（Pyrus calleryana）“首都”（Capital）储存的碳量比其他梨属（Pyrus calleryana）品种低得多。根据其他研究，这些估算值可能会增加22％，以增加根部存储的碳。

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