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天然林分
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  natural stand
     Application of the Natural Stand Dencity Control Diagram for checking Quality of Inventory Design of Cutting Area
     天然林分密度控制图在伐区调查设计质量检查中的应用
短句来源
     A Study of Genetic Gain of Pinus yunnanensis Natural Stand
     云南松天然林分遗传增益研究
短句来源
     APPLICATION OF NATURAL STAND GROWTH MODELS IN SUBCOMPARTMENT DATA UPDATE
     天然林分生长模型在小班数据更新中的应用
短句来源
     Given the stand factors of subcompartment, such as mean height and mean diameter of various tree species composed stand, age, number of stems per hectare, crown density, volume of open grown tree, the forest resource data of subcompartment without human disturbance could be updated completely and predicted continually by using natural stand growth models.
     当小班调查得到各组成树种的平均高、平均直径以及小班的年龄、每公顷株数、郁闭度、散生木蓄积等因子后 ,应用天然林分生长模型可以实现无人为干预小班数据的全面更新和连续预测。
短句来源
     Based on 108 permanent plots from Wangqing Forest Bureau in Jilin Province, the test results showed that the predictions by using the natural stand growth models were better than those by using growth rate in production units at present.
     通过吉林省汪清林业局 1 0 8块复位样地的验证 ,表明天然林分生长模型的预估结果优于目前生产单位所用的生长率法
短句来源
  “天然林分”译为未确定词的双语例句
     The Spatial Patterns of the Main Tree Species of Inartificial Forest Stands in Gaoyanzi Forest Center
     高岩子林场天然林分中主要树种的空间格局研究
短句来源
     Assessment of site condition quality of the natural forest of Picea asperata by multi-factor quantitative analysis.
     云杉天然林分多因素数量化生境质量评价研究
短句来源
     Quantitative classification of site condition in natural forest of Picea asperata.
     云杉天然林分生境条件数量分类研究
短句来源
     The neighborhood type, the size, the distance, the neighborhood amount complicate the neighborhood influence study, therefore, the majority neighborhood influence radius research was limited in the pure crop and the mixed forest and there were few papers about that of natural forests.
     但由于邻体影响是复杂的,受基株与邻体的种类、大小、距离、邻体个数等多方面的影响,目前大多数的邻体影响半径的研究只局限在纯林和混交林,至今没有有关天然林分的报道。
短句来源
     Plantation presents a standing volum 11.7% more than that of comparable natural forest stand and a 5—year earlier occurrence for fast-growing and the maximal wood density.
     人工林较同龄级天然林分蓄积高11.7%,速生期提早5—10年,最大密度提早5年。
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  相似匹配句对
     THE CHARACTERS OF NATURAL PINUS MASSONIANA STAND IN WANMULIN NATURE RESERVE OF FUJIAN
     福建万木林天然马尾松林分特征
短句来源
     Natural Slate
     天然板石
短句来源
     EXPLORATION ON THE SELECTION METHOD AND STANDARD OF NATURAL EXCELLENT STAND OF FRAXINUS MANDSHURICA
     水曲柳天然优良林分选择方法和标准的探讨
短句来源
     Natural Seasoning
     天然调味料
短句来源
     (6) productivity of the stand;
     (6)林分的生产力;
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  natural stand
Application of organic fertilisers on natural stand bamboos for sustainable management in peninsular Malaysia
      
Study on tracheid variation ofPicea koraiensis (nakai) in natural stand and plantation
      
Tracheid characteristics ofPicea koraiensis from natural stand in Liangshui area and plantation in Mao'ershan area were studied.
      
In natural stand, it has positive correlation between the characteristics.
      
The tracheid length and diameter have no significant difference in growth between natural stand and plantations.
      
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There are 82000 hectares of well-growth pure mongolian scots pine(Pinus sylvestris var. mongolica) forest in Honghuaerji forest, farm of Hulunbeier Prefecture,, Inner Mongolian Autonomous Region. From June of 1986 to May of 1987,large area of the forest withered with mortality of 100% in the 20-year-stands. The author collected samples of soil from stands of different age according to different declivity, dircction and position of the slope, and analysed the soil moisture content and investigated the relationship...

There are 82000 hectares of well-growth pure mongolian scots pine(Pinus sylvestris var. mongolica) forest in Honghuaerji forest, farm of Hulunbeier Prefecture,, Inner Mongolian Autonomous Region. From June of 1986 to May of 1987,large area of the forest withered with mortality of 100% in the 20-year-stands. The author collected samples of soil from stands of different age according to different declivity, dircction and position of the slope, and analysed the soil moisture content and investigated the relationship between the forest withered and the environment factors as well as stand condition of the forest. The result shows that the soil moisture content fell below the threshold of the moisture content of mongolian scots pine due to the drought of 1986. This results in the death of large area of the forest. The rainfall of 1986 was 228.3 mm and 105.7 mm lower than the average of 334.0 mm. The moisture content of soil around rootsystem of mongolian scots pine is only 2.288% to 2.360%. There are more deaths of trees due to the drought in sparse and dense forests. Natural forests are more drought- resistant than plantations and the mixed stands are more drought-resistant than pure ones. Many stands below 20-year- olddied of drought and more dcath in the stands below 10-years-old. Damages were not found in thestands growing on the northword slopes.

内蒙古呼伦贝尔盟红花尔基林场现有樟子松纯林82000ha,长势良好。但1986年6月至1987年5月,出现了大面积枯死现象,20年生以下的天然林枯死率100%。作者按林分年龄、坡向、坡位、坡度取样,分析了土壤含水量,调查枯死现象与林地环境因子和立地条件之间的相关性。结果证明,1986年的严重干旱使土壤含水量低于樟子松的含水量临界点,造成樟子松大面积枯死。1986降雨量为228.3mm,比年平均值334mm低105.77mm。在樟子松根系分布层中的含水量仅有2.288%~2.360%。郁闭度小或过大的林分因旱致死的多。天然林分因树木根系发育良好,其抗旱力强于人工林。混交林的抗旱力强于单纯林。20年生以下的林分旱死的多,10年生以下的林分旱死的更多。阴坡未发现受害的。

This paper made the quantitative classification and the ordination for Populus eu-phratica Oliv’s natural forset stand in Gansu Jinquan by TWINSPAN quantitative cassifi-cation and PCA,DCA ordination techniques,and the regressive analysis between the ordi-national results and the environmenta factors. The results show:(1)The Populus euphrat-ica Oliv’s natural forest stand in Gansu Jiuquan Can be calssified four types.there are ob-vious differences in the growing and environmental condition. but not in the age...

This paper made the quantitative classification and the ordination for Populus eu-phratica Oliv’s natural forset stand in Gansu Jinquan by TWINSPAN quantitative cassifi-cation and PCA,DCA ordination techniques,and the regressive analysis between the ordi-national results and the environmenta factors. The results show:(1)The Populus euphrat-ica Oliv’s natural forest stand in Gansu Jiuquan Can be calssified four types.there are ob-vious differences in the growing and environmental condition. but not in the age structureof the forest stand between these four types.(2)The mainly restrictive factors which affectthe growth of Populus euphratica Oliv in Jiuquaa are water table,mineralization degree ofthe water.the contents of salt and Cl ̄- in the soil.but pHvalue is,not a important one.Inaddition,the effect of the climatic factors for the growth of Populus euphratica Oliv in Ji-uquan is not significant.

本文应用TWINSPAN等级分类和PCA,DCA排序技术对甘肃酒泉地区的天然胡扬林分进行了分类和排序,并将排序的结果与环境因子之间进行了回归分析。结果表明,(1)甘肃酒泉地区的胡杨天然林分可以被划分为4个类型,这四个类型在生长更新状况及生境条件方面存在着较显著的差异,而在林分的龄级结构上并无显著区别.(2)酒泉地区胡杨生长的主要限制因子是地下水位,水矿化度,土壤总盐量及CL ̄-含量,PH值不是影响胡杨林生长的主要限制因子。而气候因子对酒泉地区胡杨林的影响并不大。

When making forest managemt inventory, according the sample plot materials, the natural stand dencity control diagram is worked out through analysis and arrangement. This diagram can closely get in touch with stand divisions; average diameter at breast height; tree hight; stem—number; growing stock; by subcompartment investigation.Only know two factors of them can you find out other factors and check whether the factors investigated outside are same with the factors in this diagram. So you can judge and check...

When making forest managemt inventory, according the sample plot materials, the natural stand dencity control diagram is worked out through analysis and arrangement. This diagram can closely get in touch with stand divisions; average diameter at breast height; tree hight; stem—number; growing stock; by subcompartment investigation.Only know two factors of them can you find out other factors and check whether the factors investigated outside are same with the factors in this diagram. So you can judge and check on the quality of inventory design for cutting area better.

天然林分密度控制图是二类调查时,利用样地材料组织编表样本,经内业整理分析而编制的林分密度控制图,它能把林分区划,小班调查的平均胸径、树高、株数、蓄积量调查紧密地联系在一起。只要已知其中两个因子就可以利用该图查出其它因子,从而分析查出8的因子和实测的因子是否相符,进一步判断伐区调查设计质量,并能有针对性的检查调查设计质量。

 
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