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standard dbh
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  基准胸径
     Forest formation was selected to be basic unit of site quality evaluation of natural tropical mountainous rain forest in Hainan Island. The average dominant tree height and DBH of dominant tree species group in forest formation were selected to be dependent variable and independent variable of site quality evaluation model. Standard DBH is 40 cm by quantitative analysis.
     以森林群系 (以下简称群系 )为海南岛热带天然山地雨林立地质量评价基本单元 (对象 ) ,以群系优势树种组平均优势高为因变量 ,平均优势木胸径为自变量 ,用定量方法求出基准胸径为 4 0cm。
短句来源
  相似匹配句对
     Standard
     标准
短句来源
     Which is the standard?
     采用什么标准评价?
短句来源
     SYNTHETIC STUDY OF DBH ANTIOXIDANT
     DBH防老剂的合成研究
短句来源
     The relationship of DBH variation to TD was analyzed.
     用聚合酶链反应 限制性片段长度多态性方法分析DBH基因G444A多态性。
短句来源
     Levels of DBH and DAT mRNA were upregulated significantly.
     多巴胺-β-羟化酶(DBH)和多巴胺转运体(DAT)mRNA的表达水平明显升高。
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Forest formation was selected to be basic unit of site quality evaluation of natural tropical mountainous rain forest in Hainan Island.The average dominant tree height and DBH of dominant tree species group in forest formation were selected to be dependent variable and independent variable of site quality evaluation model.Standard DBH is 40 cm by quantitative analysis.Site quality evaluation model of three formation type,which are...

Forest formation was selected to be basic unit of site quality evaluation of natural tropical mountainous rain forest in Hainan Island.The average dominant tree height and DBH of dominant tree species group in forest formation were selected to be dependent variable and independent variable of site quality evaluation model.Standard DBH is 40 cm by quantitative analysis.Site quality evaluation model of three formation type,which are Podocarpus imbricatus Blume, Keteleeria hainanensis Chun et Tsiang, Quercus championi Benh. forest; Dacrydium pierrei Hickel, Syzygium areiocladum Merr & Perry, Xanthophyllum hainanense Hu forest;and Castanopsis fabri Hance, Schefflera octophylla (Lour.) Harms, Endospermum chinense Benth forest,were established.The adaptability of the model was tested and the result showed that the difference between theoretical value and investigating value was not obvious.So the site index table was established.

以森林群系 (以下简称群系 )为海南岛热带天然山地雨林立地质量评价基本单元 (对象 ) ,以群系优势树种组平均优势高为因变量 ,平均优势木胸径为自变量 ,用定量方法求出基准胸径为 4 0cm。以鸡毛松、海南油杉、岭南稠林 ,陆均松、线枝蒲桃、黄枝木林 ,白椎、鹅掌柴、黄桐林 3个群系为例 ,建立了立地指数导向曲线模型 ,经模型适合性检验 ,理论值与实测值之间差异不显著。编制了立地指数表

 
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