As to the whole quality of tobacco leaf, the blend 50% : 50% of nitrate nitrogen and nitritenitrogen is the advisable choice.
从烟叶总体质量上讲,硝态氮与氨态氮的质量比为50%:50%是可取的肥料配比。
2
Under optimum conditions, the removal efficiencies of ammonia and nitritenitrogen could be above 85% and 95%, the system is running well and has reproducibility.
The measurement of nitrate nitrogen and nitritenitrogen in seawater has such disadvantages as many disturbing components, long time, poor repeatability and accuracy.