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soil
相关语句
  土壤
    STUDY ON SOIL FERTILITY OF KOREAN PINE PLANTATIONS
    红松人工林土壤肥力的研究
短句来源
    Vegetation Carrying Capacity of Soil Water in a Semi-arid Region of Loess Hilly in the Loess Plateau
    黄土丘陵半干旱区土壤水分植被承载力研究
短句来源
    Dynamics of Soil Properties and the Effect Factors Among Secondary Successive Communities in Mt.Jinyun
    缙云山森林群落次生演替中土壤特性动态变化及其影响因素研究
短句来源
    A Study on Forest Soil CO_2, N_2O and CH_4 Emission Flux and Dynamics in Xishan Area, Beijing
    北京西山地区森林土壤中CO_2、N_2O和CH_4气体的排放通量及动态研究
短句来源
    Response of Gingko Biloba to Soil Water Stress
    银杏对土壤水分胁迫的响应
短句来源
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  土壤的
    Influence of Forest on Soil
    森林对土壤的影响
短句来源
    The Forest Soil Improvement and Its Rationaal Utilization in the Area of East Fujian
    闽东地区林业土壤的改良及合理利用初探
短句来源
    Study on Soil Fertility in Chinese Fir Plantation Mixed with Alniphyllum fortunei
    拟赤杨杉木混交林培肥土壤的研究
短句来源
    A STUDY OF FOREST SOIL IN NANYUE -Ⅲ. PARTILCLE COMPOSITION
    南岳森林土壤的研究-Ⅲ.土壤颗粒组成
短句来源
    The results indicated that the forest damaged by coal exploitation was 133.68 km2. The Hg arid Cd content of soil in coal exploitation area were 3.26 and 2.73 times respectively as much as those of soil mean content in Shanxi.
    结果表明:全省因煤矿开采破坏林地 133.68 km2; 采煤区林地土壤的Hg、Cd含量是山西土壤平均含量的3.26倍和2.73倍;
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  土层
    It shows remarkable growth which is expressed by 2 cm of annual average diameter growth and 1.5 m of annual average height growth under the favorable conditions of deep and soft soil,sufficient water and fertilizer.
    在土层深厚、土壤疏松、水肥条件较好的土地上生长极其显著,年均地径生长2 cm,年均高生长1.5m。
短句来源
    The root nodules grow mostly on trees of 6~10 year old and are mostly distributed on roots of <1.0cm and in top soil of 0~15cm.
    根瘤的数量在6-10龄沙棘上分布最多,且主要分布于0-15 cm土层和径级Φ<1.0 cm的细根上。
短句来源
    The carbon density in floor was 0.3953 g C·g-1,and that in soil was 0.0150 g C·g-1 on average,being declined with soil depth.
    g-1,土壤平均碳素密度为0.0150gC. g-1,随土层深度的增加,各层次土壤碳素密度呈逐渐减少的趋势;
短句来源
    The nutrient concentrations,microbe and enzyme and their spatial distribution were analyzed for different types in Dongying county of Shandong province in silting coastal area,the main results indicated: ①soil microbes,enzyme and nutrient distribute mainly in 0~20 cm of soil layer,and less in 20~50 cm.
    本文研究了东营泥质海岸不同林分下土壤养分、微生物数量、土壤酶活性及分布特征,结果表明:①土壤微生物、土壤酶和土壤养分主要分布在0~20 cm的土层,20~50 cm的较少;
短句来源
    The average bulk density, total porosity, capillary porosity and non-capillary porosity in 0—100 cm soil layer were 1.41 g·cm-3, 52.31%, 46.11% and 6.20% under broadleaved Korean pine forest, and 0.98 g·cm-3, 50.65%, 40.32%, 10.33% under dark coniferous forest, respectively.
    两种森林类型土壤物理性质的差异比较明显,阔叶红松林0~100cm土层的平均土壤容重、总孔隙度、毛管孔隙度和非毛管孔隙度分别为1.41g. cm-3、52.31%、46.11%和6.20%,暗针叶林地土壤分别为0.98g.
短句来源
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  “soil”译为未确定词的双语例句
    Study on the Efficient Spatial Allocation and Stable Stand Structure of Soil and Water Conservation Forest System
    水土保持林体系高效空间配置和稳定林分结构研究
短句来源
    Studies on Water Consumption Characteristics of Main Tree Species of Soil and Water Conservation Forest in Semi-arid Region on Loess Plateau
    黄土半干旱区水土保持林主要树种耗水特性研究
短句来源
    Analysis and Evaluation of Agroforestry System in the Red Soil Region
    红壤区农林复合系统分析与评价
短句来源
    A Study on Effects of Biological Mulching on Growth and Soil Properties of Poplar Plantation in Southern Upland Area
    南方山地杨树人工林生物覆盖效应的研究
短句来源
    An Investigation of the Effect of Dynamic Soil Water on Tree Growth in Jiulongshan,Beijing
    北京九龙山区水分动态及其对林木生长的影响
短句来源
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  soil
An antibiotic producing strain Streptomyces violaceusniger was isolated from soil sample, characterized and studied for antibacterial and antifungal activity profile.
      
These points can be estimated by introducing the soil factor (Ks) and tree species factor (Kt) to potential evapotranspiration with the Penman formula.
      
Root biomass, length, and the number of roots in every diameter class, for each soil layer and for each plant species, are regarded as observation variables.
      
The results show that most of the vertical distributions of plant roots belong to the type wherein the roots are concentrated in the topsoil layer (0-20 cm), far more than those in the lower soil layers.
      
Ecological Benefit of Reforestation in a Severely Degraded Red Soil Region
      
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1、The most important point of reforestation in the saline and alkaline soil dis- trict is, first of all, to understand the conditions of the habitat form of planting area. In accordance with the different conditions of habitat form, the principle of right species in tbe right site and the rational composition of plantation, the plant percent is promoted. 2、Based upon the conditions of climate, topography and soil, such three main factors as the amount of salt in soil, the water level of soil...

1、The most important point of reforestation in the saline and alkaline soil dis- trict is, first of all, to understand the conditions of the habitat form of planting area. In accordance with the different conditions of habitat form, the principle of right species in tbe right site and the rational composition of plantation, the plant percent is promoted. 2、Based upon the conditions of climate, topography and soil, such three main factors as the amount of salt in soil, the water level of soil and the texture of soil may be used as references in classifying the conditions of habitat form. The salt con- tent is divided into four groups: less than 0.3%, 0.3--0.5%, 0.5--1% and more than 1%; the water level of soil is classified into two classes: one is more than I meter, other is less than 1 meter; the texture of saline soil is grouped into three classes: heavy clay, sandy loam-clay loam, light loam-medium loam. Total in all there are eleven conditions of habitat form. 3、On the most especially heavy saline soil (the salt content is more than 1%) no reforestation is avaitable or plant Tamarix juniperina, Populus euphra- tica after the soil is transformed into less salted. On the heavy saline soil (the salt content is more than 0.5--1%) plant Tamarix juniperina, Populus euphratica and Populus canadensis. On the favorable saline soil (the salt contlnf is 0.3- 0.5%) Tamarix, Amorpha fruticosa, Poplus euphratica, Populus canadensis, Ulmus pumila, Salix mastudana, Elaeagnus erispa, Fraxinus americana, Robinia pseudo-acacia may be planted. On light Ealine soil (the salt contlnrt less than 0.3%) Aitan- thus altisslma, Ziziphus jujub, Morus alba, Phellodendron amurense, Thuja orientalis may be panted besides those species mentioned above.

作者分析了营口地区盐渍土的土壤植被条件,提出以土壤盐分含量、地下水位和土壤质地作为立地条件的主要因子,将该地区的造林立地条件划分为十一种类型。进一步分析了该地造林树种的生物学特性,按不同立地条件类型分别提出了适宜的造林树种。

1、The constitution of the quick-growing and good harvest forest of Populus canadensis consists of the form of planting composition and planting distance. It de- termines the nursing and leaves' space, large or small, of forest tree, hence it in- fluences the amount of out-pat aud quality of timbers. There are differeut opinions to the proper constitution. To study it is very important. 2、In foreign countries the constitution of poplar forest is quite different. The form of planting is sometimes square or rectangle....

1、The constitution of the quick-growing and good harvest forest of Populus canadensis consists of the form of planting composition and planting distance. It de- termines the nursing and leaves' space, large or small, of forest tree, hence it in- fluences the amount of out-pat aud quality of timbers. There are differeut opinions to the proper constitution. To study it is very important. 2、In foreign countries the constitution of poplar forest is quite different. The form of planting is sometimes square or rectangle. Some countries adopt close plant- ing, and others adopt open. In general, square and rectangle are adopted in artificial forest of Populus canadensis, while triangle planting is rearly used. A tendeucy is to use close planting. There are 400 to 40,000 planting thocks in per hectare. The difference is 100--times. 3、The rational close planting of Populus canadensis is right triangle aud square, because in such condition the orown may be normally developed, and striaght bole maintained. In the oircumstances of the same planting distance, the right triangle planting site produces 15.5% more products than thesquare (planting). Populus canadesis is a very intolerant species with high adaptability and de- mands water more than fertilizer. As the climatical and soil conditions are favourable, especially water is available and guaranteed, the density of planting may be deter- mined according to the following factors: (1) In eccordance with the table of the average height and diameter of tree in relating to the planting distance, at the first intermittent cutting, to resolve the planting distance: As the average height and diameter of the tree is known, at the first intermittent cutting, the corresponding rational distance of the first planting will be then easy found out from the table. on the other hand, the square value of the normal growing crown is used as a standard to determine the nursing spare and planting distance. In the mean time the first intermittent cutting year may be ob- tained. (2) To find out the rational close of planting by means of the soil fertility and the intensity of managenient: When the condition of soil fertility and water is suitable and the intensity of management is high, the trees grow fast the crown clo- sure is quick, open stocked in first planting is all right, dsing 3.5 × 4--6 × 6 M. in distance. If the condition of site is not good the site should be planted first close then open, using 1.3 × 1 .5--3 × 3 M. in distance promoting the crown in early closure, then thinning and transplanting the seedlings to the open site or plan- ting shrubs or farm crops between the rows of planting. (3) To find out the rational close of planting by means of the year and stan- dard of planting stocks: At the same conditions of site and management, one year seedlings or slips are used in close planting. While 2--3 year seedlings, 3--4 meters in height, are used in open planting. First close planting then open, as the plant- ing stocks grow 1--2 years 1ater, the dense stocked seedlings should be thinned and transplanted in the near by planting area. Then both sites become open stocked forests.

加拿大杨速生丰产林的结构应着重研究杨林的配置方式和造林密度,因为它决定林木营养面积和叶面积你大小,从而影响椽木的产量和质量。作者建议采用正三角形或正方形配置,提倡稀植,每公顷277—714株,或者先密后稀,早期疏开。确定造林密度的因子,首先是依据第一次间伐时平均树商、平均胸径号造林密度关系表”确定造林密度,同时试用冠幅的平方值,作为计算林木营养面积的依据;第二是依据土壤肥力(特别土壤水分)专经营强度确定造林密度;第三是依据苗木年龄及规格确定造林密度。稀植加杨林,15年成林时,预计高达22米,胸径35厘米,每公顷木材蓄积量240—360立方米。

1、The most important point of reforestation in the saline and alkaline soil dis- trict is,first of all,to understand the conditions of the habitat form of planting area.In accordance with the different conditions of habitat form,the principle of right species in the right site and the rational composition of plantation,the plant percent is promoted. 2、BaSed upon the conditions of climate,topography and soil,such three main factors as the amount of salt in soil,the water level of soil...

1、The most important point of reforestation in the saline and alkaline soil dis- trict is,first of all,to understand the conditions of the habitat form of planting area.In accordance with the different conditions of habitat form,the principle of right species in the right site and the rational composition of plantation,the plant percent is promoted. 2、BaSed upon the conditions of climate,topography and soil,such three main factors as the amount of salt in soil,the water level of soil and the texture of soil may be used as references in classifying the conditions of habitat form.The salt con- tent is divided into tour groups:less than 0.3%,0.3-0.5%,0.5-1% and more than 1%;the water level of soil is classified into two classes:one is more than I meter,other is less than 1 meter;the texture of saline soil is grouped into three classes:heavy clay,sandyloam-clayloam,light Ioam-medium loam.Total in all there are eleven conditious of habitat form. 3、On the most especially heavy saline soll (the salt content is more than 1%) no reforestation is available or plant Tamarix juniperina,Populus euphra- tica after the soil is transformed into less salted.On the heavy saline soil (the salt content is more thau 0.5-1%)plant Tamarix juniperina,Populus euphratica and Populus canadensis.On the favorable saline soil (the salt contlnf is 0.3- 0.5%) Tamarix,Amorpha fruticosa,Populus euphratica,Populus canadensis,Ulmus pumila,Salix matsudana,Elaeagnus crispa,Fraxinus americana,Robinia pseudo-acacia may be planted.On light saline soil (the salt contlnrt less than 0.3%) Aitan- thus altisslma,Ziziphns jujub,Morus alba,Phellodendron amnrense,Thuja orientalis may be panted besides those species mentioned above.

作者分析了营口地区盐渍土的土壤植被条件,提出职土壤盐分含量、地下水位和土壤质地作为立地条件的主要因子,将该地区的造林立地条件划分为十一种类型。进一步分析了该地造林树种的生物学特性,按不同立地条件类型分别提出了适宜的造林树种。

 
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