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可变密度收获表
相关语句
  variable density yield table
     The mean precision of the prediction model reached 97. 8% through the test of50 sample plots and it could be used to work out the variable density yield table.
     此预测模型经50块样地检验,平均精度达97.8%,可以用于编制可变密度收获表
短句来源
     STUDY ON NATURAL DAHURIAN LARCH STAND GROWTH MODEL AND VARIABLE DENSITY YIELD TABLE
     兴安落叶松天然林林分生长模型和可变密度收获表的研究
短句来源
     The Establishment of Variable Density Yield Table for the Chinese Fir Plantation in Kaihua
     浙江开化杉木人工林可变密度收获表的编制
短句来源
     On the Establishment of Variable Density Yield Table for the Pinus massoniana Plantation in Fujian
     福建马尾松人工林可变密度收获表的编制
短句来源
     THE ESTABLISHMENT OF VARIABLE DENSITY YIELD TABLE FOR CHINESE FIR PLANTATION IN DAGANGSHAN EXPERIMENT BUREAU
     大岗山实验局杉木人工林可变密度收获表的编制
短句来源
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  variable-density yield table
     On Drawing up the Variable-density Yield Table for Chinese Fir Plantation
     杉木人工林可变密度收获表的编制
短句来源
     Based on foregoing information, density index of stand was led into drowing control chart of stand density into variable-density yield table so that the outputting results between chart and table were correspondant, this provided a method for drawing up variable-density yield tables, simplex method.
     引入林分密度指数,将林分密度控制图导成可变密度收获表,保证了图表之间输出结果的一致性,为可变密度收获表的编制提供了一种方法。
短句来源
  “可变密度收获表”译为未确定词的双语例句
     Studies on the Dynamic Prediction Methods of Forest Resources Ⅱ.The yield pre-evaluation
     森林资源动态预测方法的研究Ⅱ.编制可变密度收获表的收获预估模型
短句来源
     Study on Drawing up Variable-density Yield Tables with the Control Chart of Stand Density
     用林分密度控制图编制可变密度收获表的研究
短句来源
     The result of precision test indicated the prediction accuracy for the BP model was high, which could be applied to inventory data renewal for forestry management and management decision optimization and variable density volume table.
     检验表明 ,所建模型预测精度高 ,可应用于森林经理调查、数据更新与经营决策优化以及编制可变密度收获表
短句来源
     By combination of site index,density-controlling diagram of artificial stand of Pinus sylvestris was compiled with densith index and was changed into variˉavle-densith yield table,which could forecast and control the harvest for merchantable forest.
     在多形地位指数模型基础上 ,引进林分密度指数 ,把编制的落叶松人工林林分密度控制图推导成可变密度收获表 ,对商品林的收获进行预测和控制 ,建立了商品林立地、密度与收获一体化的经营管理技术体系。
短句来源
     Variable density yield tables of Dahurian larix are constructed based on growth equation of average stand DBH and relationship between average stand DBH and the other stand attributes.
     根据林分平均胸径生长方程和其他林分生长因子的相关规律,探讨编制兴安落叶松天然林可变密度收获表的方法。
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  variable-density yield table
Study on the method of constructing variable-density yield table
      


The variable density yield table is established for Chinese fir plantation in Dagangshan Experiment Bureau, which is based on generalized Richards growth model, in which site index and density index are included. Errors in the model are analyzed. The results show that the table is suitable for Chinese fir plantation in this Bureau and the method proposed in the paper is satisfying.

本文利用推广的 Richards 生长模型编制了大岗山实验局杉木人工林的可变密度收获表,在这模型中包括地位指数及密度指数。误差分析表明此表适用于该地区的杉木人工林,这种编表方法是一种较好的方法。

The variable density yield table of young and middle age stands of dahurian larch (Larix gmelinii Rupr) in Daxing′anling district were compiled base on the growth theory of Von Bertalanffy. We have developed time-site-density continuous equations and studied the growth and yield of DBH, height, basal area and volume of different origins, sites and densities of dahurian larch. The result reflected the present growth situation of dahurian larch and provided the theoretical basis for constructing forestry tables...

The variable density yield table of young and middle age stands of dahurian larch (Larix gmelinii Rupr) in Daxing′anling district were compiled base on the growth theory of Von Bertalanffy. We have developed time-site-density continuous equations and studied the growth and yield of DBH, height, basal area and volume of different origins, sites and densities of dahurian larch. The result reflected the present growth situation of dahurian larch and provided the theoretical basis for constructing forestry tables and taking corresponding management treatments.

本文通过内蒙古大兴安岭林区兴安落叶松幼、中龄林可变密度收获表编制过程,根据生长理论,建立时间-立地-密度连续型方程,对该树种不同起源、不同立地、不同密度的林木的直径、树高、断面积和蓄积量的生长规律进行了研究,所得结果即反映内蒙古大兴安岭林区兴安落叶松幼、中龄林的现状,又为编制林业数表和采取相应经营措施提供理论根据。

Growth of average stand DBH is discussed based on relationship between stand growth and stand density. Growth equation of average stand DBH is fitted with data of 65 plots and 130 stem analyses of site index 8 meters of Dahurian larix collected from Daxinanlin in Neimenggu. Variable density yield tables of Dahurian larix are constructed based on growth equation of average stand DBH and relationship between average stand DBH and the other stand attributes.

本文从林分生长和林分密度间的关系,探讨了林分平均胸径的生长,并用于内蒙古大兴安岭地区收集的兴安落叶松(Larix gmelinii Rupr.)地位指数18m的65块标准地和130株解析木数据。根据林分平均胸径生长方程和其他林分生长因子的相关规律,探讨编制兴安落叶松天然林可变密度收获表的方法。

 
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