Abstract: The Conditions and method for determining nitrogen in citrus leaves with Qiu's nitrogen extractor were studied. The results showed that the method was simpler, safer and more accurate compared with distillating method. Furthermore, about 90% electricity was saved by this method.

Key words: Nitrogen determination, Qiu's nitrogen extractor, Citrus

摘要： 研究了用丘氏气提滴定法测定柑桔叶片中氮素的条件和方法。实验结果表明,与蒸馏滴定法相比,丘氏法简便安全,结果准确可靠。

关键词: 氮测定, 丘氏气提定氮器, 柑桔