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细根系
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  fine root
     Effect of Forest Fire on Fine Root in Soil
     林火对土壤细根系生物量影响的研究
短句来源
     The fine root biomass increased after fires, which was the most significant after high intensity fires, and the least significant after moderate intensity fires.
     火烧后,细根系的生物量均有所增加,且高强度火烧后增加最显著,其次是低强度火烧,中强度火烧最不明显;
短句来源
     The effects of forest fires on soil moisture content, separate coefficient, porosity, water-retaining capacity, organic matter, available N, available Ca, fungi and fine root significantly varied between the years after burning.
     火烧后年限对土壤含水率、分散系数、孔隙度、持水量、有机质、有效氮、有效钙、真菌、细根系生物量的影响有显著差异;
短句来源
     The effects of forest fires on soil separate coefficients, porosity, saturated water-retaining capacity, available Mg, fine root significantly varied between the fire intensity.
     火烧强度对上壤分散系数、孔隙度、饱和持水量、有效镁、细根系生物量的影响有显著差异。
短句来源
     Based on the field investigation, sampling and lab analysis to ten burned forest soil plots in Xinlin Forest Bureau in Daxing′anling forest region, this paper finds that the fine root biomass(D<2 mm) is different in different fire intensity and after-fire-period plots:(1)the fine root biomass is increased after fire, and it is the most outstanding after high intensity fire,and then is the low intensity fire, the moderate intensity fires is the most unremarkable;
     通过对大兴安岭新林林业局 2 0年不同年份 10块火烧迹地进行调查取样和室内分析 ,发现不同年限不同强度的火烧迹地土壤中细根系 (直径 <2 m m)生物量的变化不同 :( 1)火烧后 ,细根系的生物量均有所增加 ,且高强度火烧后增加最显著 ,其次是低强度火烧 ,中强度火烧最不明显 ;
短句来源
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  “细根系”译为未确定词的双语例句
     Influence of tree root system on soil anti scourability improvement was studied in the bedrock coast of Zhejiang province. The results shows that root system can intensify soil anti-scourability by the action of fine roots (≤0.5 mm and 0.5~1.0 mm).
     对岩质海岸防护林主要造林树种根系强化土壤抗冲性进行研究 ,发现根径在 0 .5mm以下和 0 .5~ 1mm的细根对土壤抗冲性的强化效应显著 ,原因在于数量庞大的细根系直接网络土体、活跃细根系的死亡分解及根系分泌物对土壤结构的间接改良作用。
短句来源
     But the influence of high intensity fires is most outstanding after 10 or 20 years;
     而高强度火烧对细根系生物量的影响除了在当年比较显著以外 ,在火烧 10年、 2 0年后最显著 ;
短句来源
     The thinner the soil texture for planting seabuckthorns was, the more roots biomass the seabuckthorns had. There was the most biomass of hairy roots, and then decreased with root diameter from big to small, the biomass of hairy roots in Chunhua soil was 10.78 grams, about two and five times in Ansai and Wuqi soil respectively.
     苗木根系生物量所栽培土壤的质地越细,根系生物量越大,不同根级毛根的最大,淳化土壤毛根生物量高达10.791g,分别为安塞和吴旗的2.0和5.0倍,之后随着根径的降低而逐渐降低。
短句来源
  相似匹配句对
     Fine Singular Points
     奇点
短句来源
     Defoliation and root rottingbecome progressively serious as the disease advances.
     根系腐烂。
短句来源
     Plant root exudates.
     根系分泌物
短句来源
     STUDY ON DEVELOPMENTAL MORPHOLOGY OF PEDICULARIS STRIATA PALL.
     叶马先蒿根系发育形态学研究
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     COFFEE
     品咖啡
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  fine root
The influence of woodland soil bulk density on the growth and distribution of fine root system of main planting tree species in the Weibei Loess Plateau was investigated by means of pot culture and field survey.
      
Further analysis implied that there existed negative correlations between soil bulk density and fine root length in the woodland of P.
      
ansu, whose fine root biomass changed little in different pot culture media.
      
In this study, the fine root decomposition of the two species was investigated in the mixed plantation of 27-year-old Canadian poplar (P.
      
Results showed that: (1) the fine root decomposition of Canadian poplar and black locust trees was different.
      
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Influence of tree root system on soil anti scourability improvement was studied in the bedrock coast of Zhejiang province. The results shows that root system can intensify soil anti-scourability by the action of fine roots (≤0.5 mm and 0.5~1.0 mm).The fine roots can increase soil anti scourabiliy not only by the direct consolidation of the large amount of root net, but also by the indirect improving action on soil structure after roots discomposed. The regression models of tree roots and the intensified value...

Influence of tree root system on soil anti scourability improvement was studied in the bedrock coast of Zhejiang province. The results shows that root system can intensify soil anti-scourability by the action of fine roots (≤0.5 mm and 0.5~1.0 mm).The fine roots can increase soil anti scourabiliy not only by the direct consolidation of the large amount of root net, but also by the indirect improving action on soil structure after roots discomposed. The regression models of tree roots and the intensified value of soil anti-scourability had been made in this paper.

对岩质海岸防护林主要造林树种根系强化土壤抗冲性进行研究 ,发现根径在 0 .5mm以下和 0 .5~ 1mm的细根对土壤抗冲性的强化效应显著 ,原因在于数量庞大的细根系直接网络土体、活跃细根系的死亡分解及根系分泌物对土壤结构的间接改良作用。当根径不小于1mm径级的细根在原有基础上每 1 0 0 0cm3土增加 1 0 0 g根量 ,树木根系对土壤抗冲性强化值将分别增加 2 1 .45(湿地松 )、1 2 .2 0 (马尾松 )、2 8.99(日本扁柏 )和 1 1 .34(毛竹 )。

Based on the field investigation, sampling and lab analysis to ten burned forest soil plots in Xinlin Forest Bureau in Daxing′anling forest region, this paper finds that the fine root biomass(D<2 mm) is different in different fire intensity and after-fire-period plots:(1)the fine root biomass is increased after fire, and it is the most outstanding after high intensity fire,and then is the low intensity fire, the moderate intensity fires is the most unremarkable;(2)after low intensity fires, the increment of...

Based on the field investigation, sampling and lab analysis to ten burned forest soil plots in Xinlin Forest Bureau in Daxing′anling forest region, this paper finds that the fine root biomass(D<2 mm) is different in different fire intensity and after-fire-period plots:(1)the fine root biomass is increased after fire, and it is the most outstanding after high intensity fire,and then is the low intensity fire, the moderate intensity fires is the most unremarkable;(2)after low intensity fires, the increment of the fine root biomass is the highest in present year, then decreasing gradually in the years followed. It is reduced to the same level compared with the unburnt site after 6 years. It has then an increasing tendency in the years followed. The influence of moderate intensity fires on the fine root biomass presents an irregular change. But the influence of high intensity fires is most outstanding after 10 or 20 years;(3)it has a fine root biomass increment following a rainfall after any fires.

通过对大兴安岭新林林业局 2 0年不同年份 10块火烧迹地进行调查取样和室内分析 ,发现不同年限不同强度的火烧迹地土壤中细根系 (直径 <2 m m)生物量的变化不同 :( 1)火烧后 ,细根系的生物量均有所增加 ,且高强度火烧后增加最显著 ,其次是低强度火烧 ,中强度火烧最不明显 ;( 2 )低强度火烧 ,当年细根系生物量增加最多 ,以后逐年下降 ,至火烧 6年后基本达到未烧前的水平 ,以后随着火烧后年限的增加 ,细根系生物量又有逐年增加的趋势 ;中强度火烧对细根系生物量增加的影响呈现不规律的变化 ;而高强度火烧对细根系生物量的影响除了在当年比较显著以外 ,在火烧 10年、 2 0年后最显著 ;( 3 )无论何种强度的当年火烧迹地 ,一场雨过后 ,细根系生物量增加都是最明显的

s: In this research, soil auger is used to investigate root distribution characters of the main planted species, R. pseudoacacia, in loess area. Based on the spatial analysis of the root biomass distribution characters, results indicated that there were obvious dif-ferences in root spatial distribution characters on different sites. On northern hillsides, root biomass of R. pseudoacacia is distributed relatively evenly in the soil of different depth, which favored to extend the absorption space of the tree,...

s: In this research, soil auger is used to investigate root distribution characters of the main planted species, R. pseudoacacia, in loess area. Based on the spatial analysis of the root biomass distribution characters, results indicated that there were obvious dif-ferences in root spatial distribution characters on different sites. On northern hillsides, root biomass of R. pseudoacacia is distributed relatively evenly in the soil of different depth, which favored to extend the absorption space of the tree, and promoted the growth of the upper part of the tree. On southern slope, its root is concentrated in upper soil of 40~80 cm, which limited the absorption space of the root system, and consequently the growth of the upper part of the tree. Judging from its horizontal distribution characters, on southern hillsides, root biomass decreased rapidly with the increase of distance to the trunk; while on the northern hillsides, root sys-tem has maximum biomass on the distance of 1.0 m, 1.5 m and 2.0 m to the trunk, which helped to indicated that the root system of R. pseudoacacia on northern hillside has larger absorption space than that on southern hillsides. Analysis of the distribution characters of root biomass with different diameter class showed that the differences in root distribution patterns were mainly caused by root with larger root diameters (d>3 mm). Further analysis indicated that on the two sites, root biomass with diameter between 1 mm and 3 mm has similar distribution patterns; but there was obvious differences in the root biomass distribution patterns with its diameter less than 1 mm, which was in accordance with the site differences, and can be treated as physiological effective root to reflect the effect of site on tree growth. Combined with the root distinction coefficient, root biomass distribution characters were analyzed quan-titatively. Results indicated that on southern slope, root distribution coefficient of total root biomass, root biomass with diameter less than 3 mm, 1 mm was 0.984, 0.980 and 0.975 respectively, which indicated that relative small root, especially fine root, was distrib-uted in deeper soil. While on northern slope, root distribution coefficient of total root biomass, root biomass with diameter less than 3 mm, 1 mm was 0.988, 0.990 and 0.990 respectively, which indicated that there was relative lager root, especially fine root was dis-tributed in deeper soil. Comparatively, the root biomass distribution pattern on northern slope extended the absorption space of the tree, favored the absorption of soil moisture and nutrient in deeper soil, and promoted the growth and development of the upper part.

采用土钻法对黄土高原地区主要造林树种刺槐的根系分布特征进行调查,结果表明不同立地上刺槐根系的空间分布特征具有明显差异。阴坡立地上,刺槐根系随距树干距离的增加表现出了先增加后减少的趋势,并且不同深度土层的分布相对比较均匀,这一分布特征扩大了刺槐根系的吸收空间范围,有利于树木地上部分的生长;而阳坡立地上的刺槐根系随距树干距离的增加呈降低趋,并且各处根系集中分布在40~80cm的土层中,这一分布特征限制了根系在土层中的吸收空间,进而树木地上部分的生长也产生了一定的限制作用。对不同径级根系生物量分布特征的分析结果表明,不同立地上根系存在的差异主要是由于大径级根系生物量而引起的,阴坡立地上的细根生物量更大一些。在两个立地上,直径为1mm细根系的根系消弱系数数值较小,说明在深层土壤中的分布较少,这种分布结构不利于树木对深层土壤水分和养分的吸收利用;而...

采用土钻法对黄土高原地区主要造林树种刺槐的根系分布特征进行调查,结果表明不同立地上刺槐根系的空间分布特征具有明显差异。阴坡立地上,刺槐根系随距树干距离的增加表现出了先增加后减少的趋势,并且不同深度土层的分布相对比较均匀,这一分布特征扩大了刺槐根系的吸收空间范围,有利于树木地上部分的生长;而阳坡立地上的刺槐根系随距树干距离的增加呈降低趋,并且各处根系集中分布在40~80cm的土层中,这一分布特征限制了根系在土层中的吸收空间,进而树木地上部分的生长也产生了一定的限制作用。对不同径级根系生物量分布特征的分析结果表明,不同立地上根系存在的差异主要是由于大径级根系生物量而引起的,阴坡立地上的细根生物量更大一些。在两个立地上,直径为1mm细根系的根系消弱系数数值较小,说明在深层土壤中的分布较少,这种分布结构不利于树木对深层土壤水分和养分的吸收利用;而阴坡立地上的刺槐较细根系的根系消弱系数数值较大,说明?

 
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