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major factor
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  主导因子
    The results showed major factor influncing the growth of local artificial forest of locust (Robinia pseudoacacia L. ) was soil water condition affected mainly by local topographic factors.
    结果认为,土壤水分因子是影响当地刺槐人工林生长的主导因子,而土壤水分状况主要受当地地形因素的影响。
短句来源
    (3) The synthetical interaction of water and heat factors is the major factor to produce the variations of L. olgensis and the temperature is the principal one.
    (3)水热因子的综合选择作用是长白落叶松地理变异的重要因素,其中温度是主导因子;
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  主要因子
    The closer relations between the growth of Robinia pseudoacacia and soil moist- ure(r=0.8965)show the soll moisture is a major factor effecting growth of Robinia pseudoacacia,the terrain and soil are major factors dividing different site types of loess plateau.
    水分与刺槐生长之间关系密切(r=0.8965)。 说明水分是影响刺槐生长的主要因素,地形和土壤则是划分黄土高原立地类型的主要因子
短句来源
    Through regression analysis on the results of investigations of tree factor, light intensity and wheatoutput of poplar and wheat inter-planting fields over plain -area of south Shanxi province. the lightintensity was considered as the key factor affecting the wheat-output of inter-planting fields and thedifferent density distribution of poplars as the major factor regulating the light of wheat field.
    通过对晋南平川杨麦间作地的林木因子、光照强度及小麦产量的调查结果进行回归分析.认为光照强度是影响间作心肝麦产量的关键因素.杨树不同的密度配置是调节麦田光照的主要因子
短句来源
    Alkali-decomposed nitrogen in the medium was the major factor influencing the ratio of the aboveground and underground parts of the seedling.
    基质中碱解氮的含量是影响容器苗地上与地下部分比例关系的主要因子
短句来源
    Plantation density was still a major factor influencing biomass of the five-year-old plantation.
    此时林分密度仍是影响林分生物量的主要因子 ;
短句来源
    Experiment on soil erosion at bamboo stand with stimulated raining showed that slope was the major factor of soil erosion, especially when slope was over 30. Coverage on soil could effectively decrease soil content on surface runoff.
    采用人工模拟降雨装置,对毛竹林地土壤流失进行了试验,结果表明:林地坡度是影响林地土壤流失的主要因子,坡度在30以上时,极易造成林地土壤冲刷; 地表覆盖能有效地降低地表径流中的泥沙含量;
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  “major factor”译为未确定词的双语例句
    (2)Through the analysis of the data of the cuttage experiment with complete randomized block design of clone 4N and the data of 4N, Rcr, local species with the orthogonal test, the result shows that the NAA and IBA+NAA are better than IBA,which can improve the rooting rate. And the major factor that influenced the rooting rate was the kind of hormone. The best combination is 4N, 500 mg/L-1 and IBA+NAA.
    (2)通过对无性系4N随机区组扦插调查以及对Rcr、4N、本地刺槐的正交分析表明NAA和IBA+NAA对提高4N的生根率的作用较大,而IBA对提高无性系4N的生根率的作用不明显,影响扦插生根的主导因素是激素种类,最佳组合是4N、500mg/L~(-1)、IBA+NAA。
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    The mechanism and effects of soil and water conservation of the rainfall interception and the storage capacity in the high-brush forest compound model of the 'Tamarindus indica+Cajanus cajan' have been studied in this paper using the major factor of the rainfall classes.
    以降水等级为主要影响因子,研究了罗望子(Tamarindus indica)+木豆(Cajanus cajan)乔灌复合模式林对降雨的截留、贮存所产生的水保效应。
短句来源
    The results showed that auxin was not the major factor, but the different kinds of cytokinin had an significant different effect on the differentiation rate.
    结果表明:生长素的种类与浓度对叶盘分化频率影响不显著;
短句来源
    Through relationship analysis sunlight time inside forestry is major factor to affect the wheat's yields.
    运用关联分析,林內日照时数是影响小麦产量的主导因素。
短句来源
    Through multilinear regression analysis the trees' height is major factor for the rice yields.
    经多元逐步回归分析,树高是影响水稻产量的主导因素。
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  major factor
The structure of the compounds was a major factor determining the degree of sorption.
      
Endogenous inhibitors of angiogenesis are proved to be a major factor preventing the emergence of clinically manifested stages of human cancer.
      
It was concluded that the molecular mobility is the major factor determining the electron transport properties of the systems of interest.
      
As a rule, complexonates are much more effective them the corresponding acids; if the complexing agent is fixed, then the stability constants (Ks) of the complexes become the major factor.
      
The French-Russian cooperation in radiochemistry actively develops today and is a major factor in the progress of this science and nuclear industry in these two countries.
      
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Owing to the generative propagation over a long period of time many lines of Camellia oleifera have varied and degenerated, which is the major factor resulting in low yield of Camellia production. For keeping the excellent properties of fine varieties it is of great importance to develop tissue culture and rapid propagation, using the organs, tissue and cells of elite trees. Since 1979 germination of embroids and pseudo-bulbils has been studied, and rapid propagation of axillary shoots tested, as a result,...

Owing to the generative propagation over a long period of time many lines of Camellia oleifera have varied and degenerated, which is the major factor resulting in low yield of Camellia production. For keeping the excellent properties of fine varieties it is of great importance to develop tissue culture and rapid propagation, using the organs, tissue and cells of elite trees. Since 1979 germination of embroids and pseudo-bulbils has been studied, and rapid propagation of axillary shoots tested, as a result, a number of plantlets from tissue culture of elite trees has been obtained. In 1982 a transplant experiment was established, and the surrival of plantation with such plantlets observed. The indices show the same growth of tissue culture plantlets as that of seedlings, in some cases the former is even better.

油茶长期使用有性繁殖,引起了品种类型的变异与退化,这是目前油茶低产的一个重要原因。为了保持油茶良种的优良性状,用油茶优树的器官、组织和细胞进行组织培养,快速繁殖,在油茶生产上具有重要的意义。我们从1979年开始,研究了油茶胚状体、假珠茅成苗过程及腋生枝快速繁殖等再生方式,形成了大量油茶优树的组培苗,又于1982年研究了组培苗移栽成活的方法,并观察了上山造林的情况。实践表明,用组培和快速繁殖的小苗上山造林后,各项生长指标均等于或超过实生苗。

The site types were classfied according to enviromental factors in this paper. Both of the relationships between soil water and other enviromental factors, and between the mean height of dominant trees and some factors of site (topography, the type of lithic and the soil type utilized) were analysed with quantitative theory I . The results showed major factor influncing the growth of local artificial forest of locust (Robinia pseudoacacia L. ) was soil water condition affected mainly by local topographic...

The site types were classfied according to enviromental factors in this paper. Both of the relationships between soil water and other enviromental factors, and between the mean height of dominant trees and some factors of site (topography, the type of lithic and the soil type utilized) were analysed with quantitative theory I . The results showed major factor influncing the growth of local artificial forest of locust (Robinia pseudoacacia L. ) was soil water condition affected mainly by local topographic factors. A table of local soil water class and forecasting equation of mean height of dominant trees of artificial locust forest with base age were established in this paper. A table of the site types suit for this region and a site map within the area of 1335.0 hectares were made as well

此项研究根据环境因子划分立地条件类型,用“数量化理论Ⅰ”分析了土壤水分与其它环境因子之间,以及刺槐人工林地的优势木平均树高与林地某些因子(地形、黄土母质类型和造林前的土地利用类型)之间的关系。结果认为,土壤水分因子是影响当地刺槐人工林生长的主导因子,而土壤水分状况主要受当地地形因素的影响。提出了该地区土壤水分等级表,和刺槐人工林标准林龄优势木平均树高的预测方程式。并编制了适合该地区的立地条件类型表,绘制了1355.0公顷面积范围内的立地图。

Grassy thicket is a main vegetation which is distributed inthose provinces in the mountain-hilly region along the QinlingMountain-Huai River and Great Wall,after the forests have beendestroyed.The floristic composition of the grassy thicket communityconsists of 9—31 species.The dominant plants are grassy and mixedwith shrubs.The major factor which affects the communityis soil moisture content,The biomass of its fresh weight above-groud ismean 102·7 kg/m(?);the stocking rate is mean 25.38(?)/mpersheep/year.under...

Grassy thicket is a main vegetation which is distributed inthose provinces in the mountain-hilly region along the QinlingMountain-Huai River and Great Wall,after the forests have beendestroyed.The floristic composition of the grassy thicket communityconsists of 9—31 species.The dominant plants are grassy and mixedwith shrubs.The major factor which affects the communityis soil moisture content,The biomass of its fresh weight above-groud ismean 102·7 kg/m(?);the stocking rate is mean 25.38(?)/mpersheep/year.under a well covered grassy thicket,the mould of soil-water erosion is2700 t/km~2,whereas when the plant community is destroyed it increasesto 8640t/km~2.When the hiliside is closed to facilitate afforestationand the site quality is good,shrubs grow higher anddominate,while broadleaf deciduous young trees also exist.If weprotect it,the grassy thicket would be succeeded by forest.The grassy thicket,if used as pasture land,would result inlow productivity and would cause soil and water erosion,but itcan control soil-water erosion and improve the environment;there-fore,ecological considerations are very important in the utilizationof grassy thicket.

灌草丛是分布在秦岭——淮河之间各个省山地丘陵上森林破坏后的一种主要植被型。灌草丛群落的区系组成包括9—31种植物,优势种为草类并混有灌木。影响形成这种群落的主要因素是土壤含水量。它在地上部分生物量的鲜重平均为102.7公斤/亩,载畜量平均为25.38亩/羊/年。在发育良好的灌草丛下,土壤侵蚀模数为2700吨/平方公里;当植物群落受到破坏时可增高到8,640吨/平方公里。在立地条件良好且进行封山育林时,则灌木生长较高并占优势,同时长有落叶阔叶幼树。如果加以保护,灌草丛就可能演替为森林。如果将灌草丛作为放牧地,其结果是不仅生产力低而且造成水土流失。由于它能控制水土流失并改善环境,因此在利用灌草丛时要十分重视从生态学观点来考虑。

 
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