By canonical correlation analysis, sampling time was selected, and foliar mutriment elements closely related to forest tree growth were determined.

用典型相关分析方法选择采样时间、确定与林木生长有密切关系的叶片养分元素。

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Insects and pathogens are integral components of forest ecosystems and normally are present at a relatively low density, causing little damage, and having negligible impact on tree growth and vigour.

昆虫和病原体是森林生态系统的固有成分，通常其密度相对较低，所造成的损害较小，对树木生长及其活力的影响微乎其微。

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First, cleaning up a forest after a fire or storm does not necessarily create the right conditions for tree growth.

首先，在大火或者暴风雨之后的清理并不一定会给树的生长提供合适的生长环境。

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The 3km and 9km Circles in a Forest trails explore the refreshing green environment, passing 3m-high tree ferns, old-growth trees, strange fungi and babbling brooks.

BBC: Step back in time in South Africa��s Garden Route