莴苣叶片和根全氮含量的测定
过量铜对莴苣生长、养分吸收及酶活性的影响Growth, nutrient uptake and enzyme activity response of Lettuce (Lactuca sativa L.) to excess copper土耳其阿塔图尔克大学农学院园艺系土耳其伊迪特普大学工学院遗传和生物工程系基于凯氏法使用格哈特Gerhardt公司维普得Vapodest 10快速凯氏蒸馏系统检测莴苣叶片和根的总氮含量The Kjeldahl method and a Vapodest 10 Rapid Kjeldahl Distillation Unit (Gerhardt, Konigswinter, Ger many) were used to determine total N