一定面积林地上所有树木在生长过程中的直径、树高、材积不断的增长数量总和，分别称为直径生长量、树高生长量、材积生长量，合称森林生长量。林业上常用的森林生长量指标是连年生长量和平均生长量。
森林面积每年都在增加，林木生长量大于消耗量。
Forested areas have been expanding every year, with the increase in standing timber greater than that of felled lumber.
通过测定生长量综合因素，从辽宁森林经营研究所引进的36个无性系中，选育出优良无性系5个，占13·9%。
By means of measuring integrated factors of growth volume, selected and bred 5 elite clones introduced from 36 clone Larix kaempferi in Liaoning Forest Management Institute which covered by 13.9%;
结果发现，环境污染对树木的生长以及森林牛物量影响较大。
The results showed that forest ecosystem biomass was inhibited by environmental pollution.
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