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根系分解
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  root decomposition
     Root decomposition and nutrient release of Fraxinus manshurica and Larix gmelinii plantations.
     水曲柳和落叶松人工林根系分解与养分释放
短句来源
     Affectional Factors(N、C/N、Temperature and Water Content) of Root Decomposition
     影响根系分解因素(N、C/N、温度和水分)的研究
短句来源
     In the study of forest ecosystem’s carbon and nutrient cycles, root decomposition shouldn’t be ignored.
     因此,根系分解在C和养分循环中起重要作用,如果将其忽略,土壤有机质和养分元素的循环将会被严重低估.
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  “根系分解”译为未确定词的双语例句
     (iii) We get the structure and root space decomposition of twisted affine Kac-Moody algebra g(A~((3)))when k=3 after proceeding on g(A) from homogeneous affine extension, center and derivative extension.
     (iii)对g进行齐次仿射、中心、导子扩张得到扭仿型Kac-Moody代数g(A( 3) ) ; 给出了g(A( 3) )的子代数结构以及根系分解
短句来源
     mandshurica had an annual decomposition coefficient of 0.3649, 0.4381 and 0.2720, while those of L. gmelinii had the coefficient of 0.1967, 0.1955 and 0.2464, respectively.
     结果表明,水曲柳粗根、中根和细根年分解系数分别为0·3649、0·4381和0·2720,落叶松依次分别为0·1967、0·1955和0·2464.通过养分分析发现,根系分解过程释放大量C和养分.
短句来源
     Pores formed after decomposition of soybean roots had good stability andcontinuity.
     团聚体内部孔隙较多,大豆根系分解后形成的孔隙稳定性和连续性好;
短句来源
     In this review,we use published results,laboratory incubation results of decomposing roots,and leaf litter decomposition data in the coniferous forests of the Pacific Northwest of USA to assess the potential effects of global change(e.g.,elevated CO 2 atmospheric concentration,global warming,and precipitation change)on litter decomposition in terrestrial ecosystems.
     通过分析业已发表的文献、实验室根系分解实验和美国西北部针叶林叶片的分解实验 ,旨在评估大气二氧化碳浓度增高、气候变暖和降水变化对陆地生态系统枯落物分解的可能影响。
短句来源
     mandshurica, and all sizes of L. gmelinii roots, respectively. In the second year of the experiment, about 50% of nitrogen and 40% of phosphorus were released from the coarse and medium roots of the two species, and 60% of nitrogen and phosphorus were released from their fine roots.
     在根系分解第2年,两树种粗根和中根N的释放在50%左右波动,P在40%左右波动,两树种细根N和P的释放均达到60%.
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     Defoliation and root rottingbecome progressively serious as the disease advances.
     根系腐烂。
短句来源
     Affectional Factors(N、C/N、Temperature and Water Content) of Root Decomposition
     影响根系分解因素(N、C/N、温度和水分)的研究
短句来源
     Root decomposition and nutrient release of Fraxinus manshurica and Larix gmelinii plantations.
     水曲柳和落叶松人工林根系分解与养分释放
短句来源
     By decomposing D((?)
     通过分解D((?)
短句来源
     the uniqueness of this decomposition;
     分解的唯一性;
短句来源
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  root decomposition
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.
      
In this paper we essentially classify all locally finite Lie algebras with an involution and a compatible root decomposition which permit a faithful unitary highest weight representation.
      
The net directional N transfer was from peanut to rice and this was calculated by the difference in the bi-directional transfers and was mainly due to peanut root decomposition.
      
We also investigated root decomposition in fertilized plots at the youngest and oldest sites; when roots were produced and decomposed in fertilized plots, root decomposition rates increased with N and P additions at the 4.1-Myear-old site.
      
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The effect of soybean on micromorphology of the tilth soil was investigated by means ofpolarizing microscopic techniques.The observation indicated that soil particles of soybeanstubble arranged loosely and most of the aggregates were round and oval.Many types of ar-ranged aggregates formed multishaped and multisized pores connected with each other likenetted branches.Pores formed after decomposition of soybean roots had good stability andcontinuity.There were many pores inside aggregates.By observing the thin...

The effect of soybean on micromorphology of the tilth soil was investigated by means ofpolarizing microscopic techniques.The observation indicated that soil particles of soybeanstubble arranged loosely and most of the aggregates were round and oval.Many types of ar-ranged aggregates formed multishaped and multisized pores connected with each other likenetted branches.Pores formed after decomposition of soybean roots had good stability andcontinuity.There were many pores inside aggregates.By observing the thin soil section itcould be seen that the root secreta and substances fallen off the root system glued soil parti-cles directly and humus in colloidal,membranous,wadding and infectious,states merged withsoil particles.These results provided direct evidence for the physical analysis of the soil.

本文采用土壤切片法研究了大豆对耕层土壤微形态的影响。结果表明,大豆茬土的土壤颗粒排列疏松,透光性好,具有多级圆形或椭圆形的复合团聚体,垒结形成彼此连通的树枝状和网状的多形态、多级孔隙。团聚体内部孔隙较多,大豆根系分解后形成的孔隙稳定性和连续性好;薄片中清晰地观察到根系分泌物和脱落物直接胶结土壤颗粒,形成稳定的土壤团聚体以及絮状、胶膜态和浸染态等多种形态腐殖质与土壤颗粒相互融合的情形,说明了大豆根系对土壤微结构具有良好的的改善作用,这为宏观土壤物理分析的结果提供了直接的证据。

In this paper,the annual fallen,decomposition and accumulation quantities of litter in forest ecosystems were calculated by the model analogized from Mitscherlich model that biomass increment followed hypothetically.The model defined the biological significance of storage,annual fallen quantities and decomposition rate of litter which were three essential elements of forest litter dynamics and nutrients cycling,the third could be calculated if the other two were known from the dynamic system they composed.At...

In this paper,the annual fallen,decomposition and accumulation quantities of litter in forest ecosystems were calculated by the model analogized from Mitscherlich model that biomass increment followed hypothetically.The model defined the biological significance of storage,annual fallen quantities and decomposition rate of litter which were three essential elements of forest litter dynamics and nutrients cycling,the third could be calculated if the other two were known from the dynamic system they composed.At the same time it put forward that the annual death quantity of root systems in forest ecosystems might be calculated by total death quantity with decomposition rate of root on stands,this provided reliable methods for calculating productive forces of root systmes in forest ecosystems.

本文在森林生态系统生物量增长遵循Mitscherlich 模型的结果这一假定下,推导的模型对森林生态系统凋落物的年凋落量、年分解量及累积量进行了推算,并得到了很好的验证。该模型给出了林地凋落物贮量—年凋落量—年分解率三者是森林凋落物动态、养分循环的三要素的生物学意义,它们组成一个紧密联系的动态系统,若已知其中的任何二者,都可以推算出第三者。同时提出了用林地死根总量以及根系的分解速率来推算森林生态系统根系的年死量,为计算森林生态系统根系的生产力提供可靠方法。

Understanding the response of litter decomposition to elevated CO 2 atmospheric concentration,global warming,and change in precipitation is of crucial importance in understanding soil organic matter formation and carbon sequestration in terrestrial ecosystems.In this review,we use published results,laboratory incubation results of decomposing roots,and leaf litter decomposition data in the coniferous forests of the Pacific Northwest of USA to assess the potential effects of global change(e.g.,elevated CO 2...

Understanding the response of litter decomposition to elevated CO 2 atmospheric concentration,global warming,and change in precipitation is of crucial importance in understanding soil organic matter formation and carbon sequestration in terrestrial ecosystems.In this review,we use published results,laboratory incubation results of decomposing roots,and leaf litter decomposition data in the coniferous forests of the Pacific Northwest of USA to assess the potential effects of global change(e.g.,elevated CO 2 atmospheric concentration,global warming,and precipitation change)on litter decomposition in terrestrial ecosystems.Elevated CO 2 concentration influences litter decomposition indirectly by decreasing litter substrate quality and increasing soil moisture content in dry grassland ecosystems.According to 17 publishied studies,doubled ambient CO 2 concentration decreased the average N concentration of tree litters and herbaceous litters by 19.6% and 9.4%,respectively.The average lignin:N ratio of tree litters and herbaceous litters increased 36.3% and 5.5%,respectively,due to CO 2 enrichment.Such substrate quality changes should generally lead to a reduction in the decomposition rate of litters.Global warming directly increases litter decomposition,however,the Q 10 value used to express this stimulatory effect decreased with increasing temperature.The degree that global precipitation change influences litter decomposition will depend on the potential magnitude of this change as well as the current moisture conditions.Even within a single region like Pacific Northwest of USA the responses of litter decomposition to altered rainfall can be divergent,with some sites increasing,others decreasing,and others remaining relatively unchanged.Several research areas are identified for reducing the uncertainites in the effects of global change on litter decomposition in terrestrial ecosystems.

了解枯落物分解对大气二氧化碳浓度增高、气候变暖和降水变化的反应 ,对深入理解陆地生态系统土壤有机物形成和碳的固化能力 (Carbon sequestration)十分重要。通过分析业已发表的文献、实验室根系分解实验和美国西北部针叶林叶片的分解实验 ,旨在评估大气二氧化碳浓度增高、气候变暖和降水变化对陆地生态系统枯落物分解的可能影响。大气二氧化碳浓度增高可通过降低枯落物质量和增加草原生态系统土壤水分间接地影响枯落物分解。根据 1 7项研究结果 ,大气二氧化碳浓度加倍可导致木本和草本枯落物平均氮含量降低 1 9.6%和 9.4 %;木质素 /氮比值增高 3 6.3 %和5 .5 %。枯落物质地的降低通常导致枯落物分解减慢。气候变暖一般加速枯落物的分解 ,但是用于表示这种促进作用的Q10 随着温度的增高而降低。全球降水变化对陆地生态系统枯落物分解的影响不但取决于现有水分条件而且还取决于降水变化的程度。以美国西北部地区的针叶林为例 ,降水改变对森林生态系统枯落物分解的影响将是多元的 ,有的增加 ,有的降低 ,而有的相对不变。最后 ,指出了今后在该领域有待加强的几个研究方面

 
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