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1)  nitrate metabolism
硝态氮代谢
2)  nitrate metabolic pool
硝态氮代谢库
1.
3 g/kg),to study the in vivo and the in vitro nitrate reductase activities(NRA),nitrate metabolic pool size(NMPS),storage pool size(NSPS) and the changes of the leave blade NRA response to excess nitrate.
结果表明,叶片内源硝酸还原酶活性、内源/外源硝酸还原酶活性比值、叶片的硝态氮代谢库大小及代谢/贮存库比值与叶柄硝态氮含量呈相反趋势。
2.
The results showed that nitrate concentration in petiole is much higher than that in the other organs,nitrate concentration of petiole was negatively correlated with the ratio of in vivo nitrate reductase activity(NRA) to in vitro NRA in blade, and the nitrate metabolic pool size (MPS) in blade cell showed no certainrelationship with nitrate concentration in petiole.
结果表明:叶柄中硝态氮含量远高于其它器官,其含量与叶片内源/外源硝酸还原酶活性的比值呈负相关;叶片细胞中硝态氮代谢库的大小与叶柄中硝态氮含量之间没有确定的关系。
3.
The result indicated that applying humic acid properly decreased nitrate con-centration but increased nitrate reductase activity(NRA) and enlarged nitrate metabolic pool size in leaf vegetables.
结果表明,合理施用腐植酸能降低叶菜类蔬菜硝酸盐含量,增强硝酸还原酶活性和增大硝态氮代谢库。
3)  nitrogen metabolism
氮素代谢
1.
Effects of exogenous Ca~(2+) on nitrogen metabolism in wheat seedlings;
外源钙离子对小麦幼苗氮素代谢的影响
2.
Effect of two diphenylethers herbicides on growth and nitrogen metabolism of peanut at the seedling stage;
两种二苯醚类除草剂对花生苗期生长发育及氮素代谢的影响
3.
Effects of doubled atmospheric CO_2 concentration on nitrogen metabolism of tra nsgenic Bt cotton under different nitrogen fertilization levels.
不同氮素水平下CO_2倍增对转Bt棉花氮素代谢的影响
4)  Nitrogen metabolism
氮代谢
1.
Effect of appling malic acid on nitrogen metabolism of flue-cured tobacco;
施用苹果酸对烤烟氮代谢的影响
2.
Effect of carboxymethyl chitosan on nitrogen metabolism of rice;
不同浓度羧甲基壳聚糖对水稻氮代谢影响研究
3.
Effects of application of N and K fertilizers on nitrogen metabolism of two genetype varieties of maize under water-stressed condition;
水分胁迫下氮、钾对不同基因型夏玉米氮代谢的影响
5)  Metabolism of nitrogen source
氮源代谢
6)  Nitrogen and energy metabolism
氮能代谢
补充资料:硝态氮
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性质:以硝酸根离子NO3—形态存在于土壤、植物和肥料中的氮素。常用符号NO3——N表示。硝酸钠、硝酸钙、硝酸铵(除含硝态氮外,还含有铵态氮,因其性质更接近硝态氮肥,故归入之)都属于硝态氮肥。淹水的水稻田中硝态氮含量很少,而在温带旱作土壤中硝态氮常有积累。它是植物直接吸收利用的速效性氮素。土壤中硝态氮含量随季节和植物的不同生育期而变。土壤硝态氮不被土壤吸附,雨季易淋失,水田中还可因反硝化作用而损失。植物中的硝态氮是植物体内主要的无机态氮,在一定范围内植物中的硝态氮含量可反映当时土壤供氮状况和植物体内氮素营养水平。但水稻体内所含硝态氮极少,不能作为氮素营养水平和诊断指标。植物组织液中硝态氮的含量(以N计)约为100~1000mg/kg。硝态氮是水质监测的重要项目之一。有些国家已将含氮订入了湖沼水质的标准。

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