1)  nitrogen concentration
含氮率
1.
This paper studied the emergence and growth of tillers, leaf emergence and dry matter production of rice with solution culture systems of different nitrogen concentrations.
结果表明:分蘖发生及新叶的出生与供氮水平及叶片、叶鞘的含氮率关系密切,过高过低的供氮水平均不利,即分蘖发生及新叶的出生要求一个最适的供氮水平,在本试验中是70~50mg/L;过低的氮素供应水平,会使叶蘖同伸的n—3关系打破,出现叶蘖n—4同伸的滞后现象;分蘖的发生与发生分蘖的节位和上一节位的叶片、叶鞘的含氮率呈极显著正相关,此两叶的含氮率高则分蘖发生多,因此,这两叶含氮率的高低可作为分蘖发生与否的诊断指标。
2)  N content
植株含氮率
1.
The objective of experiment was to study the spatial-temporal distribution of Chlorophyll content(SPAD value) in leaves and its correlation to plant N content in summer maize cultivars,Zhengdan958,at different nitrogen levels.
在不同施氮水平下,研究了夏玉米郑单958叶片叶绿素含量(SPAD值)的时空动态变化及其与植株含氮率的关系。
3)  containing nitrogen
含氮
4)  nitrogen content
含氮量
1.
Influence of pretreatment process on nitrogen content of soybean protein fibre;
大豆蛋白纤维前处理工艺条件对含氮量的影响
2.
Genotype differences of nitrogen content in cultivated rice seed.;
栽培稻种子含氮量的基因型差异
3.
Reasons affecting nitrogen content of lime nitrogen, which is produced by converter process is analyzed.
分析了转炉法生产石灰氮中影响石灰氮含氮量的原因,通过合理掺用催化剂、调整炉料细度、改造原料配料系统等方法,优化了生产工艺条件,稳定了炉料配比以及炉料的发气量,提高了石灰氮的含氮量,氮的质量分数稳定在22。
5)  nitrogenous group
含氮基团
1.
Five calix[4]arenes bearing nitrogenous group had been synthesized by introducing three different nitrogenous groups in the lower rim.
以对叔丁基苯酚为起始原料,经过3步反应,在母体杯芳烃的下沿引入3种不同的含氮基团,得到5种含氮杯[4]芳烃,并通过1HNMR和熔点测定确定了产物结构。
6)  nitrogen heterocyclic rings
含氮杂环
1.
In order to search for the new pyrazolyl-heterocycles lead compounds, eight pyrazolyl-(heterocycles) were synthesized from 3-ethyl-1-methyl- 4-substituted-5-pyrazolecarboxylic acid chloride and nitrogen heterocyclic rings such as 3-methyl-5-pyrazolone, 1H-3-ethyl-5-pyrazole (carboxylic) (ethyl) ester, etc.
为了寻求新的含吡唑双杂环先导化合物,用 4 取代 1 甲基 3 乙基 5 吡唑甲酰氯与 3 甲基 5 吡唑酮、3 乙基 5 吡唑甲酸乙酯等含氮杂环反应得到了 8个新的含吡唑环的双杂环类化合物。
参考词条
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