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   nitrification 在 自然地理学和测绘学 分类中 的翻译结果: 查询用时:0.18秒
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nitrification
相关语句
  硝化作用
    Irrigation prompts nitrification, and-NH4+-N turns to NO2--N and NO3--N swiftly, thus the concentration of NH4+-N in soil decreases.
    泡田加速了土壤中的硝化作用,NH_4~+-N迅速向NO_2~--N和NO_3~--N转化,降低了土壤中NH_4~+-N的浓度。
短句来源
    Applying NH4+-fertilizer can significantly increase the content of NH4+-N in soils, and as the processing of nitrification the content of NH4+-N was reduced, and NO3--N was increased gradually.
    滴灌施用铵态氮肥显著增加了土壤中NH_4~+-N含量,随着硝化作用的进行,NH_4~+-N含量降低,NO_3~--N含量增加。
短句来源
    the organism matter correlates with nitrification intensity very well, (r bourgeon=0.3545、rthree leaves=0.4004、rstem pushing=0.9828**、r tassel=0.9981 **、r mature=0.9927**).
    有机质含量与硝化作用强度之间有很好的相关性(萌芽期r=0.3545、三叶期r=0.4004、拔节期r=0.9828**、抽穗期 r=0.9981 **、成熟期r =0.9927**)。
短句来源
    Nitrification contributed 88.3% to soil N2O flux of wheat season.
    3.小麦生长季N_2O排放主要来自于硝化作用(贡献率为88.3%),反硝化作用的贡献率很小;
短句来源
    Similarly, N2O was primarily produced through nitrification in the soybean and maize growing season.
    大豆、玉米种植下硝化作用是土壤N_2O排放的最主要来源,反硝化速率处于检测限之下。
短句来源
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  “nitrification”译为未确定词的双语例句
    A STUDY OF NITRIFICATION OF NH 4 + AND MOVEMENT OF NO 3 - BY TIME DOMAIN REFLECTIOMETRY (TDR) METHOD
    用TDR确定沙壤土非饱和淹灌条件下NH_4~+的硝化反应及NO_3~-的入渗迁移
短句来源
    Under the same migration andtransformation condition. the purification capacity of soil is increased with the content ofclay in the soil. The increase of the nitrification reaction rate is a decisive factor.
    土质是影响土壤氮迁移的重要因素之一.在迁移转化环境条件相同的情况下,随着土壤颗粒中粘粒含量的增加,土层的净化容量增加,其中土层的反硝化反应速率的增加是硝酸根去除的决定性因素.
短句来源
    NH 4 SO 4 Nitrification and Its Influence Factors in Shaanxi
    陕西几种土壤中硫酸铵的硝化作用及其影响因素
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
    Undisturbed soil cores from the Inner Mongolia grassland in northern China were incubated in the laboratory to examine the effects of land use history, temperature, soil moisture, and their interactions on net N mineralization and nitrification rates.
    室内实验:设置不同的温度梯度和水分梯度,在不同的时间段内对原状土柱进行室内培养,观察这些因子对土壤净氮矿化的影响。 结果表明:(1)土壤无机氮库(NH4+-N和NO3?-N)在不同土地利用方式情况下差异显著。
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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Characteristics of nitrogenous migration and transformation in different types ofsoils of water logged aeration zone have been studied through laboratory soil-columnexperiments. A mathematic model of nitrogenous migration and transformation in waterlogged aeration zone of soil has been made. The results show that the main contaminant ofnitrogen in groundwater is the nitrate. and the composition of soil is an important factorwhich influences migration and iran formation of nitrogen. Under the same migration andtransformation...

Characteristics of nitrogenous migration and transformation in different types ofsoils of water logged aeration zone have been studied through laboratory soil-columnexperiments. A mathematic model of nitrogenous migration and transformation in waterlogged aeration zone of soil has been made. The results show that the main contaminant ofnitrogen in groundwater is the nitrate. and the composition of soil is an important factorwhich influences migration and iran formation of nitrogen. Under the same migration andtransformation condition. the purification capacity of soil is increased with the content ofclay in the soil. The increase of the nitrification reaction rate is a decisive factor.

通过室内土柱实验,研究了氮在包气带不同土质层中饱水条件下迁移转化的特征;建立了一维饱和土壤层中氮迁移的预测模型.研究结果表明:氮对地下水的污染因子是硝酸根;土质是影响土壤氮迁移的重要因素之一.在迁移转化环境条件相同的情况下,随着土壤颗粒中粘粒含量的增加,土层的净化容量增加,其中土层的反硝化反应速率的增加是硝酸根去除的决定性因素.

Unsaturated soil column experiment was conducted with measurement of soil water moisture and soil conductivity by Time Domain Reflectometry (TDR) combined with analysis of soil extract solution. The ratio of conductivity of soil extract solution and soil bulk conductivity measured is linearly related to soil moisture. It shows that TDR can be used to measure the solute movement behavior of unsaturated soil irrigation system, in which nitrification occurs in discontinuous pores at surface layer of soil...

Unsaturated soil column experiment was conducted with measurement of soil water moisture and soil conductivity by Time Domain Reflectometry (TDR) combined with analysis of soil extract solution. The ratio of conductivity of soil extract solution and soil bulk conductivity measured is linearly related to soil moisture. It shows that TDR can be used to measure the solute movement behavior of unsaturated soil irrigation system, in which nitrification occurs in discontinuous pores at surface layer of soil with litter regard to water movement. From the analysis of Br - and NO 3 - (which is in agreement with conductivity measured by TDR) at upper layer of soil, infiltration process was found following piston movement mechanism. The method can be used to study the movement of water and solute in vandoze zone.

对于沙壤土柱实验,用TDR(时间域反射计)结合土壤抽提液的溶质分析,研究了在非饱和灌溉条件下的硝化和NO-3的迁移.测得的土壤体电导率与土壤抽提液的电导率之比和土壤含水量成线性关系,籍此用TDR可以确定非饱和灌溉条件下土壤中溶质浓度的变化规律;硝化过程是在土壤表层的不连通的小孔隙中进行的,几乎不受水分运动的影响;由示踪剂Br-的入渗及土壤表层的NO-3(相当于TDR测得的电导率值)入渗分布得出,入渗是按活塞推移作用进行的,借此方法可以研究非饱和入渗的机理.

he definition, content and evaluation standards of red soil nutrient degradation are proposed. Research results showed that about 80% of the soil area in hilly region belongs to severe and extremely severe degradation class for soil phosphorous, and 20% for N, 10% for potassium. Leaching is the main mechanism for N degradation in soil, especially because the nitrification process is rapid in this region. For P, the fixation process is considered to be the main cause for P degradation. The amount of P...

he definition, content and evaluation standards of red soil nutrient degradation are proposed. Research results showed that about 80% of the soil area in hilly region belongs to severe and extremely severe degradation class for soil phosphorous, and 20% for N, 10% for potassium. Leaching is the main mechanism for N degradation in soil, especially because the nitrification process is rapid in this region. For P, the fixation process is considered to be the main cause for P degradation. The amount of P fixed by soil in this region ranged from 60 to 1300 mgP/kg. Longterm field experiment results show that the rate of nutrients restoration of degraded soil is different for different nutrients; for N, P and K, the rank is P>K>N, which means that the restoration of N is slow. However, the results also show that for the restoration of N and C pool of soil the most effective measure is to apply organic manure reasonably.

通过试验研究,提出了土壤养分退化的定义、内容和评价标准。结果表明,本区属严重和极严重退化的土壤面积,氮占20%左右,磷占80%左右,钾占10%;属肥沃等级的土壤面积,钾占1/3左右,氮占1/6左右,而磷为零。在农田土壤养分退化机理方面,氮主要是淋失,特别是由于铵态氮在施入土壤后10天即大量转化为硝态氮,这大大增加了氮素淋失的可能;磷的退化机理主要是磷的固定,红壤最高固磷量可达1300mg/kg,但不同土壤差别很大,少的只有60mg/kg。研究表明,养分库的重建速度是很不相同的,其顺序是P>K>N(P、K为速效态)。可见,红壤有效磷、钾库的重建在正确施肥条件下,可以较快地达到,但土壤氮库的重建要慢得多。研究还表明,只有在正确施用有机肥的情况下,土壤的氮库和碳库才能较稳定地提高。

 
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