standard species

At the same time, with the large sapling forest ecosystem is for the research object, bring up the concept of key species that with related the degree of harm sapling, and the calculation formula of key species index and distinguish the standard.

同时，以幼林生态系统为研究对象，提出了与林木危害程度相关的群落关键种的概念以及关键种指数的计算公式和判别标准。

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Without a standard specimen, we analysed the heavy element content of 6 moss species in the King George Island of Antarctica by XRF.

在无标样条件下，我们利用微束X荧光分析法对南极乔治王岛的6种苔藓植物的叶和茎进行重元素分析。

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Beneficiary: we are signing agreement on forestation sites, area, species, labor payment standard, etc.

[农民: 我们在签订协议,造林的地点 、 面积 、 树种 、 劳务标准等]?

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Through reliability analysis, data distribution test, and other selected indicators of central tendency, we choose the sample data in mid-October as the standard study. According to the formula, we calculated the 6 species of leaf characteristics of the standard parameters.

通过可靠性分析、数据分布检验、集中趋势指标选定等，选择10月中旬的样本数据作为标准研究对象，根据公式，计算得到上述6种植物的标准叶形特征参数。

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