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nitrification
相关语句
  硝化
    Additionally, the rates of N transformation were the highest in the soil with mixed litters too, i.e. nitrification rate was 1.74 mg · kg~(-1)· d~(-1); ammonification rate was 0.36 mg · kg~(-1)·d~(-1); N mineralization rate was 1.90mg·kg~(-1)·d~(-1).
    硝化、矿化和氨化速率较大,分别为1.00 mg·kg~(-1)·d~(-1)、1.85 mg·kg~(-1)·d~(-1)和0.85 mg·kg~(-1)·d~(-1)。
短句来源
    1. Forest restoration stage had no significant effect on gross nitrification rates (One-way ANOVA, P<0.05). There was no significant difference in the temperature coefficient (Q10) for gross nitrification rate among all the forest types (One-way ANOVA, P<0.05).
    1.川西亚高山针叶林不同恢复阶段土壤的总硝化速率差异不显著(P<0.05),不同恢复阶段土壤总硝化作用的Q10值差异不显著(P<0.05)。
短句来源
    Net N mineralization rates were 6. 55 mg N·kg-1. 30d-1 in seasonal rainforest and 6. 37 mg N· kg-1. 30d-1 in secondary forest. Nitrification rates were 16. 28 mg N· kg-1. 30d-1 in seasonal ralnforest, 16. 38 mg N· kg-1· 30d-1 in secondary forest.
    研究结果表明季节雨林和崖豆藤次生林的格局基本相同,氮净矿化速率分别为6.55mgN·kg-1·30d-1和6.37mgN·kg-1·30d-1,硝化速率分别为16.28mgN·kg-1·30d-1和16.38mgN·kg-1·30d-1。
短句来源
    Nitrification and net N mineralization rates were -2. 78 mg N·kg-1. 30d-1 and - 7. 85 mg N· kg-1· 30d-1 in forest gap, -3. 69 mg N· kg-1· 30d-1 and - 10. 69 mg N· kg-1· 30d-1 in agricultural land, respectively.
    而林窗下和轮歇地土壤的氮净矿化速率和硝化速率均为负值,氮净矿化速率分别为-7.85mgN·ks-1·30d-1和-10.69mgN·kg-1·30d-1,硝化速率分别为-2.78N·kg-1·30d-1和-3.69mgN·kg-1·30d-1。
短句来源
    However,they had little differences in dry season(P>0.05). In dry and rainy seasons,Nnet mineralization and nitrification rates of RA(4.40and 2.97mgN·kg -1 ·30d -1 )in dry season were lower than in rainy season(6.13and 6.79mgN·kg -1 ·30d -1 ).
    而在旱季差异都不显著,旱季砂仁地土壤氮净矿化和硝化速率(分别为4.40和2.97mgN·kg-1·30d-1)显著低于雨季(分别为6.13和6.79mgN·kg-1·30d-1);
短句来源
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  硝化作用
    1. Forest restoration stage had no significant effect on gross nitrification rates (One-way ANOVA, P<0.05). There was no significant difference in the temperature coefficient (Q10) for gross nitrification rate among all the forest types (One-way ANOVA, P<0.05).
    1.川西亚高山针叶林不同恢复阶段土壤的总硝化速率差异不显著(P<0.05),不同恢复阶段土壤总硝化作用的Q10值差异不显著(P<0.05)。
短句来源
    2. There was obvious seasonal variation for gross nitrification rates in the naturalconiferous forest, the coniferous broadleaved forest and the 40 year-spruce plantation soil.
    2.原始针叶林、针阔混交林、40年人工云杉林三种典型的亚高山针叶林土壤的总硝化作用存在明显的季节变化,但不同的针叶林类型总硝化作用季节变化规律表现出不同的特点。
短句来源
    4. Gross nitrification rates were not related to the pH value, the organic matter, total nitrogen and C/N.
    4.总硝化作用速率与土壤pH值、土壤有机质、全氮及C/N相关不显著。
短句来源
    The results showed that 99.0 % of the urea was hydrolyzed in four days after applied to the soil(a),the but urea derived NH_4~+-N was nitrified slowly,and the maximal nitrification ratio was only 46.2 %. Hence,the content of NH_4~+-N in the soil was still kept at 63.2 mg kg~(-1) after cultivated for 63 days.
    结果表明,尿素加入胶园土壤后即迅速水解,加入橡胶树行间未经培肥区土壤(a)中4天水解99.0%,生成的铵态氮14天后开始较强的硝化作用,最大硝化率为46.2%,培养63天后NH4+-N含量仍保持在63.2 mg kg-1的较高水平;
短句来源
    NET NITROGEN MINERALIZATION AND NITRIFICATION IN ONE PURE PINE ( PINUS TABULAEFORMIS ) FOREST AND ONE PINE-OAK MIXED FOREST IN DONGLING MOUNTAINOUS REGION
    东灵山油松纯林和油松-辽东栎针阔混交林土壤氮素矿化/硝化作用研究
短句来源
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  “nitrification”译为未确定词的双语例句
    NITRIFICATION AND NET N MINERALIZATION RATE OF SOILS UNDER DIFFERENT TROPICAL FORESTS IN XISHUANGBANNA,SOUTHWEST CHINA
    西双版纳不同热带森林土壤氮矿化和硝化作用研究
短句来源
    Mineralization and Nitrification of Nitrogen in Soil Grown Amomum Villo sum Under Tropical Rainforest in Xishuangbanna,South west China
    热带雨林及在其下种植砂仁的土壤中氮素矿化和硝化的对比研究
短句来源
    The net nitrification rate and net nitrification rate are different in the same period of time,which means the ammonification and nitrification are controlled by different groups of microorganisms.
    2.净氨化速率和净氮矿化速率在三种林型下均和土壤温度呈现一定程度的负相关,其中净氨化速率在龙池杉木纯林下和土壤温度达到了显著的负相关。
短句来源
    The lowering of net nitrification rate caused by the acceleration of denitrification under higher temperature seems to be the decisive process for the decrease of Al\+\{3+\} concentration. To summarise, the Al\+\{3+\} toxicity was moderated in a certain degree by the rising temperature, the nutrient situation of base cations was not improved.
    简而言之 ,温度升高在一定程度上缓解了Al3+毒害 ,但并未改善盐基离子营养状况。
短句来源
    Increasing H + along with the decreasing NH 4 +/NO 3 - ratios is consistent with the nitrification of NH 4 + in soils. The observed increase in NO 3 - in soil solution is likely the consequence of NH 4 + nitrification, which was further enhanced by leaching of NO 3 - from the soil system. The Al concentration in soil solutions is much higher than in precipitation and in throughfall water.
    (2 )土壤水中 H+和 Al3 +浓度的增高是土壤酸化的重要指标 ,可能对森林植被构成潜在危害 ;
短句来源
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  nitrification
Low levels of NO3- in these forest soils generally correspond to low net rates of nitrification.
      
Nitrification and denitrification in subalpine coniferous forests of different restoration stages in western Sichuan, China
      
Nitrification is the biological conversion of organic or inorganic nitrogen compounds from a reduced to a more oxidized state.
      
The results showed that forest restoration stage had no significant effects on gross nitrification rates or denitrification rates (One-way ANOVA (analysis of variance), p >amp;lt; 0.05).
      
There was no significant difference in the temperature coefficient (Q10) for gross nitrification rate among all the forest sites (One-way ANOVA, p >amp;lt; 0.05).
      
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The Soil microflora and microbial activities of Chinese-fir woodland infected by Tylechulus semipenetrans were studied.The results showed that the total of soil microorganisms and the quantity of several main microbial physi-ological groups in carbon and nitrogen cycles decreased obviously. However,the number of soil fungi showed a tendency to increase.The activities of soil micr-oorganisms(ammonification,nitrification,nitrogen fixation and cellulose decompo sition)weakened evidently.The results showed...

The Soil microflora and microbial activities of Chinese-fir woodland infected by Tylechulus semipenetrans were studied.The results showed that the total of soil microorganisms and the quantity of several main microbial physi-ological groups in carbon and nitrogen cycles decreased obviously. However,the number of soil fungi showed a tendency to increase.The activities of soil micr-oorganisms(ammonification,nitrification,nitrogen fixation and cellulose decompo sition)weakened evidently.The results showed that soil fertility tended to deteriorated.

对感染半穿刺线虫病后的杉木林地土壤微生物区系及微生物活性进行测定的结果表明:土壤微生物总数及参与碳、氮循环的主要几种微生物生理类群的数量明显减少,但土壤真菌数量有增加的趋势。土壤微生物活性强度包括氨化、硝化、固氮和纤维素分解作用强度明显减弱。研究结果揭示土壤肥力状况可能有恶化的趋势。

This paper analyses the biochemical intensity,enzymatic activity and the number of microbials in rhizosphere soil of Chinese fir and Chinese Sassafras.There are much more microbials,such as bacteria,actinomyces and fungi in the rhizosphere soil of Chihese sassafras than that of Chinese fir.Compared with that of Chinese fir,the rhizosphere soil of Chinese sas-safras has higher intensities of respiration, ammoniation,nitrification and celluluse digradation,and higher contents of enzymatic activity,urease,sucrase...

This paper analyses the biochemical intensity,enzymatic activity and the number of microbials in rhizosphere soil of Chinese fir and Chinese Sassafras.There are much more microbials,such as bacteria,actinomyces and fungi in the rhizosphere soil of Chihese sassafras than that of Chinese fir.Compared with that of Chinese fir,the rhizosphere soil of Chinese sas-safras has higher intensities of respiration, ammoniation,nitrification and celluluse digradation,and higher contents of enzymatic activity,urease,sucrase and phosphtas,but loWer content of polyphenol oxidase.R/S values of biochemical properties are all above one except polyphenol oxidase.Chinese sassafras has a higher R/S value than Chinese fir.

对杉木、檫树根际土壤的微生物数量、生物化学过程强度和几种酶的活性的分析结果表明:无论是细菌、放线菌还是真菌的数量檫树根际土都明显多于杉木根际土。檫树根际具有较高的呼吸作用、氨化作用、硝化作用和纤维素分解强度。脲酶、蔗糖酶和磷酸酶活性檫树根际土明显高于杉木根际土,但多酚氧化酶活性杉木根际土较高。两种林木各项生化性的R/S值除多酚氧化酶以外均大于1,并且檫树的大于杉木的。

Atmospheric nitrogen deposition has been increasing significantly over the last decades because of the influence of human activities. In forest areas, spatial variability of the nitrogen deposition depends on the stand position, structure and species composition. Besides the rainfall, dry deposition and occult precipitation are also important forms in atmospheric nitrogen deposition.Some forest canopies can absorb the deposited nitrogen to a certain extent, but the throughfall nitrogen flux increase obviously...

Atmospheric nitrogen deposition has been increasing significantly over the last decades because of the influence of human activities. In forest areas, spatial variability of the nitrogen deposition depends on the stand position, structure and species composition. Besides the rainfall, dry deposition and occult precipitation are also important forms in atmospheric nitrogen deposition.Some forest canopies can absorb the deposited nitrogen to a certain extent, but the throughfall nitrogen flux increase obviously with the nitrogen inputs of bulk precipitation.When the nitrogen deposition is more than 15 kg N/hm2. a, not only do most forest canopies not absorb the nitrogen in rainwater, but also large amounts of nitrogen are leached out from the canopies. In the long run, there is no obvious correlation between forest vegetation nitrogen increment and atmospheric nitrogen deposition. The increase in atmospheric nitrogen input can induce nitrification regardless of hardwood forest, mixed hardwood-coniferous forest, or coniferous forest. When the nitrogen deposition is large, the leaching of nitrogen from forest soils shows a obvious increase trend with the increase of the deposition. As a whole, there is no clear correlation between net nitrogen accumulation in forest ecosystems and atmospheric nitrogen deposition, and it is logical to coincide with the conclusion of no obvious correlation between forest vegetation nitrogen increment and atmospheric nitrogen deposition.

由于人类活动的影响,若干年代以来大气氮沉降明显增加。在森林地区,大气氮沉降的空间变异性由林分的位置、结构和组成树种所决定。除降雨之外,于沉降和隐藏降水(Occultprecipitation)也是大气氮沉降的重要形式。某些森林冠层对大气沉降的氮有一定的吸收作用,但穿透水中的氮通量随着降雨氮输入的增加而明显增加。大多数森林冠层在氮沉降大于15kgN/hm2·a时,不仅不吸收雨水中的氮,反而大量的氮被雨水溶脱。从长期来说,森林植被的氮增长率与大气氮输入之间无明显的相关性。不论是阔叶林、针阔混交林,还是针叶林,大气氮输入的增加都可能导致硝化作用的发生。当大气氮沉降较高时,土壤中氮的淋溶损失随着大气氮沉降的增加而呈现出明显增加的趋势、从总体上来说,森林生态系统净氮积累率与大气氮沉降之间无明显的相关性,这与植被氮增长率同大气氮沉降之间无明显的相关性这一结论在逻辑上相吻合。

 
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