CAJ | 학술논문

通过盆栽试验，采用便携式调制叶绿素荧光仪PAM-2500测定不同氮素水平下桔梗叶片叶绿素荧光参数。测定结果表明：每次施N量为0.075 g· kg-1、每个月施用1次、连续施用4次，桔梗叶片的初始荧光（ Fo）、非光化学猝灭系数（ qN）达到最小值，PSⅡ最大量子产量（ Fv/Fo）、PSⅡ实际光化学效率Y（Ⅱ）、光化学猝灭系数（ qP）均达最大值，最适宜桔梗的生长，施氮量过高或过低均会抑制桔梗的生长。
통과분재시험，채용편휴식조제협록소형광의PAM-2500측정불동담소수평하길경협편협록소형광삼수。측정결과표명：매차시N량위0.075 g· kg-1、매개월시용1차、련속시용4차，길경협편적초시형광（ Fo）、비광화학졸멸계수（ qN）체도최소치，PSⅡ최대양자산량（ Fv/Fo）、PSⅡ실제광화학효솔Y（Ⅱ）、광화학졸멸계수（ qP）균체최대치，최괄의길경적생장，시담량과고혹과저균회억제길경적생장。
The Chlorophy Ⅱ fluorescenee parametes of Platycodon grandiflorum ( Jacq.) A.DC.after the application of different concentrations of nitrogen were determined with the PAM -2500 under a pot experiment.The results showed that the amount of ap-plied N 0.075 g· kg-1 each time,administered once a month ,administered four times in a row is the best for Platycodon grandiflo-rum (Jacq.) A.DC.growth,which Fo and qN reduced to the minimum,Fv/Fo,Y(Ⅱ)and qP increased to the maximum.More or less N could inhibit the seedling growth.