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nutrient budget
相关语句
  营养盐收支
     Research on Modelling Water Exchange and Nutrient Budget in Jiaozhou Bay
     胶州湾水体交换与营养盐收支过程数值模型研究
短句来源
     A three-dimensional dispersion model and a physical-biological coupled model were developed and applied to Jiaozhou Bay in order to study the water exchange and nutrient budget that are closely related to eutrophication processes.
     本文的主要研究目标是构建一个三维水质模型和物理-生物耦合模型,并以胶州湾为研究对象,讨论该海域与富营养化密切相关的水体交换与营养盐收支过程,为富营养化多年际变化的深入研究作准备。 具体来讲,主要包括如下工作和结论:
短句来源
  养分收支
     The quantity of crop nutrients transferred from the system,and the nutrient budget of N,P and K in soil were studied.
     研究了在养分循环再利用的基础上采取不同施肥制度下作物养分移出量 ,并结合施肥量计算出土壤中N、P、K养分收支 .
短句来源
     A long-term field trial on fertilization and on use of recycled nutrients in farming systems:Ⅱ. Soil nutrient budget
     辽西褐土施肥及养分循环再利用中长期试验 Ⅱ.土壤养分收支
短句来源
     Changes of crop yield and soil fertility under long-term application of fertilizer and recycled nutrients in manure on a black soil Ⅲ.Soil nutrient budget.
     黑土长期施肥及养分循环再利用的作物产量及土壤肥力质量变化Ⅲ.土壤养分收支
短句来源
     :Results of a ten year's field experiment indicated that the use of nutrients recycled in the farming systems with appropriate amount of fertilizer applied according to the soil nutrient supplying ability could not only produce high crop yield but also balance the soil nutrient budget so that there were no significant surplus of nutrients (mainly inorganic nitrogen) which may emit or leach out of soil into environment.
     持续10 a的田间试验结果表明,在保持农业系统养分循环再利用的基础上,根据土壤养分供给力设计化肥施用量,可以在实现作物高产的同时,平衡土壤养分收支,从而避免土壤中肥料养分(主要是氮)过剩而进入环境。
短句来源
     The causes include the vulnerability of the eucalyptus plantation ecosystems, severe soil and water loss, anthropogenic disturbance to bioaccumulation process, whole-tree utilization way, unsuitable reclamation, and serious imbalance in forest nutrient budget.
     其退化成因是桉树人工林生态系统本身的脆弱性、水土流失严重、人为因素对生物积累过程的干扰、桉树全树利用方式、耕垦的不适当以及林地养分收支严重失衡。
短句来源
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  “nutrient budget”译为未确定词的双语例句
     ⑥In 9612 typhoon storm, the nutrient budget indicated that the nutrient input in rainfall of N, Mg, Ca and K were correspondingly larger than their output in streamflow and that the nutrient output of P, Al, Si in streamflow were larger than their input in rainfall.
     ⑥在9612号台风暴雨过程中,养分的输入输出变化表现为N,Mg,Ca和K的输入大于输出,P,Al,Si为输出大于输入.
短句来源
     From summary of the nutrient budget method, proportion of soluble nitrogen (N) and phosphorus (P) loads accounting for total loads of N and P in feed were summarized: shrimp 8%~12.8% (N) and 7.2%~40% (P) and fish 49%~61% (N) and 16%~26% (P).
     "养殖池中N、P收支的定量化研究"总结了投饵养殖中溶入水体的N、P占投饵N、P总量的比例,其中虾类分别为8%~12.8%和7.2%~40%,鱼类分别为49%~61%和16%~26%。
短句来源
     Nutrient Budget of Intensive Fish Ponds in Pearl River Delta
     珠江三角洲密养池塘营养物质收支的研究
短句来源
     In forest ecosystems, Carbon and nutrient allocated to soil by fine root turnover (formation, senescence, death and decomposition) is an important component of the carbon and nutrient budget.
     在森林生态系统中,通过细根的形成、衰老、死亡、分解(即细根周转),向地下部分和土壤中分配的C和养分被认为是陆地C循环和营养循环的重要组成部分。
短句来源
     Compared the annual up- take of elements by bracken with nutrient budget in soil,the efficiency of elements ab- sorbed from soil varied from 0.012 for nitrogen to 1.36 for iron.
     蕨菜对各类元素的利用系数以钙(1.39)最高。 植物的吸收量与土壤营养库相比,吸收系数最低的是氮0.012,最高为铁1.36。
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  nutrient budget
Nutrient Budget in the Seasonal Wetland of the Okavango Delta, Botswana
      
Investigations of the influence over flushing mechanisms of different residence times of the water in burrows and in the sediment body would also be recommended in order to establish salt and nutrient budget in mangrove swamps.
      
Nutrient budget analyses and discoveries of soils base cation depletion in certain sites suggest that base cation status is declining in forests of the southeastern U.S., but thus far, base cation deficiencies are uncommon.
      
The annual nutrient budget model revealed that Kavala Gulf is presently slightly autotrophic with nitrogen fixation exceeding denitrification.
      
A nutrient budget box model was used to estimate the annual capacity of Kavala Gulf to store and transform dissolved inorganic nitrogen and phosphorus, aiming at understanding the biogeochemical processes taking place in the area of interest.
      
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The nutrient flow in bracken stands during year showed an increment of nutrients in standing crop from winter to autumn,reabsorbing the nutrients by plants from soil. In autumn the senescence of live fronds results in a loss of nutrients to standing dead and the nutrients in some below ground standing crop is lost to dead rhizomes.Annual uptakes were estimated to be 17.6g/m~2 potassium,16.4g/m~2 nitrogen,12.8g/m~2 calcium, 3.14g/m~2 manganese,2.47g/m~2 iron,2.12g/m~2 phosphorus.Compared the annual up- take of...

The nutrient flow in bracken stands during year showed an increment of nutrients in standing crop from winter to autumn,reabsorbing the nutrients by plants from soil. In autumn the senescence of live fronds results in a loss of nutrients to standing dead and the nutrients in some below ground standing crop is lost to dead rhizomes.Annual uptakes were estimated to be 17.6g/m~2 potassium,16.4g/m~2 nitrogen,12.8g/m~2 calcium, 3.14g/m~2 manganese,2.47g/m~2 iron,2.12g/m~2 phosphorus.Compared the annual up- take of elements by bracken with nutrient budget in soil,the efficiency of elements ab- sorbed from soil varied from 0.012 for nitrogen to 1.36 for iron.

蕨菜草地的单优势种蕨菜(Pteridium aquilinum)现存量中的营养元素,从冬季至翌年的秋季有所增加,主要是通过植物从土壤中的吸收而获得。秋季活叶片变老,枯黄,使部分元素成为枯枝落叶现存量中的元素;在植物地下部分的元素,也因根系死亡而从活体中丧失。蕨菜草地植被每年从土壤中吸收各类元素的数量为:钾17.6克/米~2、氮16.4克/米~2、钙12.8克/米~2、锰3.14克/米~2、铁2.47克/米~2、磷2.12克/米~2。蕨菜对各类元素的利用系数以钙(1.39)最高。植物的吸收量与土壤营养库相比,吸收系数最低的是氮0.012,最高为铁1.36。

Methods of production ecology (energy and nutrient budget) are usually applied to make a quantitative analysis of the structure and the function of ecological system,input-output method is widely used to analyse quantitatively the structure and the function of economic system. A method including both the former and the latter,which can be used to study synthetically the quantitative relations between the natural reproduction and the economic reproduction, of agriculture, and the structure and the function...

Methods of production ecology (energy and nutrient budget) are usually applied to make a quantitative analysis of the structure and the function of ecological system,input-output method is widely used to analyse quantitatively the structure and the function of economic system. A method including both the former and the latter,which can be used to study synthetically the quantitative relations between the natural reproduction and the economic reproduction, of agriculture, and the structure and the function of ecological system and economic system of agriculture as well as their relationships, is presented in this paper. Based on the inputoutput analysis achieved by applying this method, the ecological-economic models and the optimization models for agriculture can be built up. The data in the list of nutrient substance flows proposed by "the symposium on cycles of mineral nutrition in agricurtural ecosystems''(Amsterdam, 1976) , are processed by this method. It will be seen from this that the same results will be achieved and Amsterdams model will be precised and systematized.

本文试图将产量生态学和经济学中投入产出二者结合起来进行农业生态经济系统投入产出分析,对农业的自然再生产与经济再生产之间的数量关系、对农业生态系统的结构和功能与农业经济系统的结构和功能之间的数量关系进行综合研究。

Distributions of nutrients were observed during November, 1986 to September. 1987 at Luoyuan Bay. The average concentrations of N, P, Si are 11.24±6.1. 0.69±0.23 and 21.6±10.5μmol/l respectively.The distribution features of N, P, Si in different seasons showed their various sources. N seems to be the limited factor for the primary production in July. Evidents from the estimations of the nutrient budgets indicate shortage of external nutrient supplies at Luoyuan Bay. We found that 91. 97 percent...

Distributions of nutrients were observed during November, 1986 to September. 1987 at Luoyuan Bay. The average concentrations of N, P, Si are 11.24±6.1. 0.69±0.23 and 21.6±10.5μmol/l respectively.The distribution features of N, P, Si in different seasons showed their various sources. N seems to be the limited factor for the primary production in July. Evidents from the estimations of the nutrient budgets indicate shortage of external nutrient supplies at Luoyuan Bay. We found that 91. 97 percent of N.P and 68 percent of Si which the primary producers need come from the recycling of the nutrients within the water. Therefore, the regeneration and circulation of the nutrients inside the Luoyuan Bay are most important processes that maintain the productive level.

1986年11月至1987年9月罗源湾水体(NO_3+NO_2),PO_4,SiO_3的平均浓度分别为11.2±6.1,0.69±0.23和21.7±10.5μmol/l。夏季营养盐的分布主要受河流输入控制,冬季氮,磷,硅的分布则分别受外海水的输入,沉积物再悬浮和河流的输入控制。营养盐的收支估算表明:罗源湾营养盐的外部来源较缺乏,生物活动所需的氮,磷,硅分别有 91%,97%和 68%源于水体的再循环。因此,湾内营养盐的再生与循环是维持生产力水平的重要过程。

 
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