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Nitrogen deficiency causes stunting of growth and chlorosis of older leaves, as chlorophyll pigments are broken down so their components can be reused in the young growing parts of the plants.
中文意思:
氮的缺乏可以导致生长的迟缓和老叶片的缺绿症,因为分解的叶绿素被新生的叶片重新利用了。


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Nitrate of soda may be sown on pasture that does not eat off. 可以把硝酸钠撒在牧草还没有吃光的草地上。
Nitrocamptothecin is a semi-synthetic derivative of camptothecin. This paper reviews the character, synthesis, pharmacology, pharmacokinetics and clinical studies of 9-nitrocamptothecin. 摘要9-硝基喜树碱是半合成喜树碱类衍生物。简要介绍了9-硝基喜树碱的性质、合成、药理、药效及临床研究进展。
Nitrogen 15 can reveal the extent to which the individual relied on animal or plant protein. 氮15会透露食物中动植物蛋白质的比例。
Nitrogen absorbed at early growth stage is mostly used to produce vegetative organs like rice straw, and that absorbed at later growth stage is used to produce grains. 生育早期吸收的氮大多数用于产生水稻茎等营养器官,后期吸收的氮用于产生籽粒。
Nitrogen content of the grain tends to be maintained at a certain percentage. 籽粒含氮量似乎保持某一百分含量。
Nitrogen deficiency causes stunting of growth and chlorosis of older leaves, as chlorophyll pigments are broken down so their components can be reused in the young growing parts of the plants. 氮的缺乏可以导致生长的迟缓和老叶片的缺绿症,因为分解的叶绿素被新生的叶片重新利用了。
Nitrogen fixation trees of Leguminosae and non-Leguminosae are important biological nitrogen fixation resources. 摘要豆科及非豆科固氮树种是重要的生物固N资源。
Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
Nitrogen forms about four-fifths of the atmosphere. 氮约占大气的五分之四。
Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
Nitrogen is an e ential food for plants. 氮是植物一种必不可少的养分。
 
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