氮元素的作用

The role of nitrogen

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1
研究结果说明，氮元素对玉米大斑病菌的生长和发育有非常重要的作用。
It was proved that nitrogen played an important role on the growth and development of the corn pathogen.
2
论述了VN元素在微合金化钢中的作用和钒钢中增氮最经济可靠的方法。
This paper introduces the function of the chemical element of VN in themicroalloyed steels and the most economic, dependable method of V steel add N.
3
结果表明：苹果的产量和品质是叶片中氮、磷、钾、钙、镁、铁等元素综合作用的结果；
According to the results of experiment, spraying Calcium fertilizer can efficienttiy increase the yield and quality of Fuji apple.

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