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major nutrient elements
相关语句
  主要营养元素
     The contents of major nutrient elements were high,the contents of TN in water was 1.63 mg/L,and the contents of phosphate was lower (0.0339 mg/L).
     水中主要营养元素含量,总氮含量较高平均为1.63 mg/L,磷酸盐含量较低平均为0.0339 mg/L。
短句来源
     The contents of major nutrient elements were high,the contents of TN in water was 1.030 mg/L,and the contents of phosphate was lower(0.017 mg/L).
     水中主要营养元素含量 ,总氮含量较高平均为 1 0 30mg/L ,磷酸盐含量较低平均为 0 0 1 7mg/L。
短句来源
     The contents of major nutrient elements were high,the content of TN in water was 0.483mg·L~(-1), and the content of phosphate was lower.
     水中主要营养元素含量较高,总氮均值为0.483mg·L-1,磷酸盐含量较低。
短句来源
     This report recommended a revised MS basal medium (macroelements were modified as follows: NH4NO3 850 mg/L, KNO3 2000 mg/L, KH2PO4 100 mg/L, which is suitable for tissue culture of woody plants, by studying effects of three major nutrient elements (nitrogen, potassium and phosphorus) on the propagation in vitro of several woody plants (Cunninghamia lanceolata (Lamb.) Hook., Sequoia sempervirens (Lamb.) Lindl.
     本文通过培养基中三个主要营养元素氮、磷、钾对若干种木本植物(如杉木、北美红杉等)离体培养繁殖影响的研究,提出了较适合于这些木本植物离体培养的改良MS基本培养基(其中大量元素氮、磷、钾水平修改为:NH_4NO_3 850mg/L,KNO_3 2000mg/L,KH_2LO_4 100mg/L)。
短句来源
     The content of the major nutrient elements was 100.65kg·hm -2 ·a -1 .The litterfall changed with the seasons.
     凋落物中主要营养元素的含量为100.65kghm-2a-1。
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  “major nutrient elements”译为未确定词的双语例句
     This paper deals with the contents of major nutrient elements(N?P?K?Ca?Mg)in tree organs and the accumulated amount of nutrient elements in the five-year Eucalyptus grandis stand with five kinds of densities.
     对5a生5种密度巨桉林木器官主要养分元素(N、P、K、Ca、Mg)的含量、林分的养分元素积累量、林分养分元素年净积累量进行了研究。
短句来源
     The results showed that the contents of major nutrient elements in tree organs were different. Their ranking was K(or Ca)>N>(or Mg)>P.
     结果表明:不同器官的养分元素含量各异,各器官中大量元素以K、Ca的含量最高,其次为N、Mg,最低的为P;
短句来源
     In this paper, the biomass, content and distribution of the major nutrient elements (N, P, K, Ca, Mg) during the period of one year in young pure stands of Cunninghamia lanceolate and young mixed-stands of Cunninghamia lanceolata and Michelia macclurei were investigated.
     本文作了广东南亚热带5年生杉木火力楠混交林以及杉木纯林生物量,林木器官的养分元素(N、P、K、Ca、Mg)含量和养分分配的研究。
短句来源
     Studied on the Above-ground Biomass and Productivity and Its Contents and Distribution of Major Nutrient Elements of the Short Rotation Eucalyptus Grandis Plantation
     短轮伐期巨桉人工林地上部分生物量与生产力和主要养分元素积累与分配研究
短句来源
     Accumulation And Distribution Of Major Nutrient Elements in Eucalyptus grandis Stand
     巨桉主要养分元素积累与分布研究
短句来源
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  相似匹配句对
     Carbon and nitrogen were two major nutrient element.
     碳、氮是食用菌生长中的两种主要营养元素。
短句来源
     Analysis on the Major Nutrient and Medical Contents in Wild Pueraria
     野葛主要营养和药用成分的分析
短句来源
     The major achievements are :
     主要研究成果如下:
短句来源
     SEP is major.
     SEP异常是判定的主要根据。
短句来源
     Accumulation And Distribution Of Major Nutrient Elements in Eucalyptus grandis Stand
     巨桉主要养分元素积累与分布研究
短句来源
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  major nutrient elements
The copper tailings contained high concentrations of heavy metals (total Cu, Ni concentrations 1779, 564 mgkg-1, respectively), and low contents of major nutrient elements and organic matter.
      
The litter mass loss, concentration and mass of some major nutrient elements, degradation of lignin and cellulose in decomposing Quercus serrata Murray leaf litter were monitored for 3 years using the litterbag method.
      
The element content in needles and the water-soluble proportions of the major nutrient elements were determined.
      
We here provide an analysis of published data to quantify these relationships for the two major nutrient elements in plants, nitrogen and potassium.
      
The population homogeneity of the stationary-phase monocultures of Pseudomonas aeruginosa dissociants was studied as a function of the initial content of major nutrient elements (C, N, and P) in the cultivation medium.
      
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Citrus trees grow well in the red soil hilly lands of subtropical China. Fujian province has a considerable acreage of citrus planted in such an environment.Seeking for a more suitable manuring programme for rapid increase in citrus production,We had,in the past two years (1981,1982) selected thirty uniform Tankan trees (grafted on Fuju stock),20 years old,in a typical red soil hilly country orchard in Nanjing county,near Zhangzhou,Fujian,for study.Representative leaf and soil samples were collected at intervals...

Citrus trees grow well in the red soil hilly lands of subtropical China. Fujian province has a considerable acreage of citrus planted in such an environment.Seeking for a more suitable manuring programme for rapid increase in citrus production,We had,in the past two years (1981,1982) selected thirty uniform Tankan trees (grafted on Fuju stock),20 years old,in a typical red soil hilly country orchard in Nanjing county,near Zhangzhou,Fujian,for study.Representative leaf and soil samples were collected at intervals for laboratory analysis during 1981 and 1982.The results were illustrated in Figures 1,2 and 3,and the main points briefly summarised as follows. 1.Annual variation curve representing the amount of major nutrient elements in Tankan leaf possessed a special pattern of its own,and showed significant differences.In the foliage,calcium content rose quickly with the increases of leaf-age,the amount of potassium dropped gradually, while magnesium likewise had a tendency to drop in content with the advance of seasons.The nitrogen content was low both at the beginning and the end but high and steady during the experiment.The amounts of phosphorus was highest during the period of September to November or in November. With the exception of calcium,the major nutrient elements were main- rained at a stationary status during July to November.The amount of fruiting influenced the major nutrient element contents,for instance,the amount of potassium and magnesium were much lower in the foliage during the heavy cropping year than that of the“off year”,while that of nitrogen and calcium were just the reverse.The amount of phosphorus was less affected by fruiting. 2.Results from our laboratory analysis of orchard soils indicated that about a third of the illustrated curves showing the seasonal variation of available nutrient elements,was nonsignificant.This situation occured espe- cially in the subsoil.The changes of significant differences of scasonal variations were found to be more pronounced between the years.Furth- ermore,data from our two year studies showed that the amount of the major available nutrient elements was consistently greater in the topsoil than that of the subsoil. Seasonal variation of soil pH was very pronounced.The amount of hydrolyzable nitrogen during 1981 (being a heavy cropping year) dropped gradually from summer to winter.But,in the case of an“off year”like that of 1982,seasonal variation of hydrolyzable nitrogen content disappeared altogether.Available potassium,phosphorus and magnesium of the topsoil became relatively low toward the end of growing season (in 1981),while the amount of these same elements showed little variation during the“off year”in 1982.Seasonal variation of the amount of nutrient elements in the subsoil was not conspicuous.The amount of available calcium dropped during the“on year”but showed an upward trend during the“off year” (1982) 3 Most of our results from statistical analysis did not showed significant correlation between the soil and the foliar nutrient element contents.Thus, it remains necessary in our further studies on fruit tree nutrition to investigate,under definite conditions,how soil and foliar analyses could be better employed as a tool to formulate practical manuring programme for proper orchard fertilization.

1981~1982年,作者对蕉柑叶片常量元素含量与土壤有效养分含量、pH 值的年周期变化进行了研究。通过统计分析表明:1.叶片各常量元素含量年周期变化曲线具有特定模式,且一致呈现季节性显著差异。叶片元素(除钙外)大致于7~11月为其含量变化的稳定期。叶片元素含量且受大小年结果所影响,钾、镁含量大年低于小年,氮、钙含量则相反,磷含量少受影响。2.土壤有效养分含量年周期变化,有1/3曲线季节间未达显著性差异,且此现象主要出现在下层土壤。有效养分含量年份间的季节差异显著性变化较大。两年各有效养分含量的全部数值,上层土壤恒高于下层土壤。上、下层土壤 pH 值均呈现季节性显著差异。3.年周期变化中的叶片与土壤常量元素含量相关系数,大多数未达显著水准。故今后尚需探明在特定条件下,各剐元素叶片与土壤分析指导施肥的实用价值。

The results of the nutrient analysis of leaf and orchard soil of produc- tive poon-kan in Fujian are presented as follows. Our preliminary studies suggested the value of optimum range leaf mineral elements in productive poon-kan as:N2.7-3.3%,P0.12-0.15%, K 1.0-1.8%,Ca2.3-2.7%,Mg 0.25-0.38%.The present work indicates the coefficient of variation of the foliar major nutrient element contents and the ratio between the amount of elements in leaves (i.e.N:P:K: Ca:Mg=1:0.05:0.43:0.97:0.10).The...

The results of the nutrient analysis of leaf and orchard soil of produc- tive poon-kan in Fujian are presented as follows. Our preliminary studies suggested the value of optimum range leaf mineral elements in productive poon-kan as:N2.7-3.3%,P0.12-0.15%, K 1.0-1.8%,Ca2.3-2.7%,Mg 0.25-0.38%.The present work indicates the coefficient of variation of the foliar major nutrient element contents and the ratio between the amount of elements in leaves (i.e.N:P:K: Ca:Mg=1:0.05:0.43:0.97:0.10).The above statistical analysis may provide the parameters for establishing diagnostic criteria for poon-kan leaf. From the soil analysis of productive poon-kan orchards,we found that the soil pH,amount of available nutrients and base saturation are suita- ble.However,the value of organic matter and total N in the soil are some- what lower.The application of organic fertilizer should be beneficial and importnant. Our investigations on the fertility of standard orchards in productive poon-kan show that the rate of N fertilization appears higher,while the application amounts of K,Mg,Ca,appear lower and should be increased moderately.

作者对福建椪柑丰产园叶片与土壤养分状况进行了研究。初步提出丰产椪柑叶片主要元素含量的适宜范围:氮2.7~3.3%,磷0.12~0.15%,钾1.0~1.8%,钙2.3~2.7%,镁0.25~0.38%;探明了叶片各元素含量的变异系数以及氮与叶片主要营养元素含量之间的平均比值(氮∶钾∶钙∶镁为1∶0.05∶0.43∶0.97∶0.10)。以上指标可供确定椪柑叶片营养诊断标准之参考。丰产椪柑园的土壤分析表明:土壤pH值、速效养分、盐基饱和度属良好水平;而土壤有机质和全氮含量的分析值,则显示出继续增施有机肥的重要性。作者还讨论了福建丰产椪柑园的施肥现状及存在问题,指出施氮量普遍偏高,而应适当增施钾、镁、钙等要素肥料。

Seasonal fluctuations of the major nutrient elements do exist in the citrus leaf contents.Our foliar analyses from four species of citrus,nam- ely,C.nobilis,C.sinensis,C.tangerina,and C.reticulata showed that there were three distinct phenological periods.The nitrogen contents ap- peared highest in the period of physiological flower bud differentiation, from Sept.to Oct..Next came to May as the period of young fruit deve- lopmental stage.The lowest in nitrogen contents was Jan.,the stage of flower bud...

Seasonal fluctuations of the major nutrient elements do exist in the citrus leaf contents.Our foliar analyses from four species of citrus,nam- ely,C.nobilis,C.sinensis,C.tangerina,and C.reticulata showed that there were three distinct phenological periods.The nitrogen contents ap- peared highest in the period of physiological flower bud differentiation, from Sept.to Oct..Next came to May as the period of young fruit deve- lopmental stage.The lowest in nitrogen contents was Jan.,the stage of flower bud morphological differentiation.As to phosphorus and potassium contents,the month of May showed the highest amount and de- creased with the development of citrus leaves.Conversely,the calcium contents increased with the age of the leaves but stopped increasing after the month of Sept..While magnesium contents appeared the lowest in May when new flushes developed.Then the amount of magnesium increased gra- dually and reached the peak in Sept..After that,the magnesium gradually decreased. The analyses of correlation between the contents of nutrient elements and the fruit yield in separate phenological periods showed that:morpho- logical floral bud differentiation stage had significant correlation between the leaf nitrogen contents and the fruit yield.As to the physiological ftoral bud differentiation stage,there was no significant correlation between the leaf nitrogen and the fruit yield of the next coming year.Leaf magnesium contents significantly or very significantly correlated with yield of the same year no matter the appearance happened in Jan.or as late as in the month of Sept..Leaf potassium contents were negatively correlated with fruit yields.The contents of phosphorus and calcium were not significant- ly correlated with fruit yields.

柑桔叶片主要营养元素含量在年周期中是有波动的。南丰蜜桔、福桔、芦柑和雪柑四个柑桔品种的三个主要物候期叶片分析表明,氮素含量以花芽生理分化期(9~10月)最高,幼果期(5月)次之,花芽形态分化期(1月)最低。磷、钾素含量5月份最高,随着叶龄的增长而逐渐降低。叶片含钙量随着叶龄增长而增加,至9月份以后含量变化不明显。叶片含镁量以5月份新叶最低,后逐渐升高,9月份达到高峰,以后又逐渐降低。各物候期营养元素含量与产量相关性分析表明,花芽形态分化期叶片氮素营养与当年产量相关显著,而花芽生理分化期叶片氮素营养与翌年产量相关不显著。无论是1月份或是9月份叶片含镁量对当年产量均有显著或极显著的相关性。叶片含钾量与产量呈负相关。磷、钙等营养元素与产量相关不显著。

 
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