不同锌肥水平下烤烟光响应曲线的拟合  

Light-response Curves Fitting of Tobacco under Different Zinc Fertilizer Levels

作　　者：白羽祥 杨焕文[1] 徐照丽 李正风 王戈[1] 史普酉 张金峰[1] 韦俊[1] 谭小兵[1] 吕世保[1] 

机构地区：[1]云南农业大学烟草学院,云南昆明650201 [2]云南省烟草农业科学院,云南昆明650201 [3]云南中烟工业有限责任公司,云南昆明650201

出　　处：《河南农业科学》2016年第12期40-44,共5页Journal of Henan Agricultural Sciences

基　　金：云南中烟工业有限责任公司科技项目(滇烟工科[2013]494号);云南省应用基础研究计划项目(2015FB145);云南省烟草公司资助项目(2015YN03)

摘　　要：为探究不同光响应曲线模型拟合不同锌肥水平下烤烟光合特征的适宜性,以烤烟K326为研究对象,采用直角双曲线模型、非直角双曲线模型和双曲线修正模型对烟株成熟期中部叶的光响应曲线进行拟合,通过分析光合参数的拟合值和实测值的近似度,选出光响应曲线适宜的拟合模型。结果表明,随着锌肥适量的增施,烤烟的最大净光合速率、暗呼吸速率、光饱和点等光合特征参数均有所上升,烤烟叶片的光合能力明显提高,但当锌肥过量时光合特征参数反而下降。3种模型对不同锌肥水平下烤烟成熟期中部叶光响应曲线的拟合效果优劣排序为双曲线修正模型>非直角双曲线模型>直角双曲线模型,且双曲线修正模型拟合出的光合特征参数最丰富。因此,双曲线修正模型是拟合不同锌肥水平下烤烟光响应曲线的适宜模型。In order to research the applicability of different light-response curve models to photosynthetic characteristics in flue-cured tobacco under different zinc fertilizer levels,the light response curve of central leaves of tobacco plants in maturity period was studied by using the flue-cured tobacco K326 as the research object. And three light response curve models,including rectangle hyperbola model,nonrectangle hyperbola model and hyperbolic correction model,were used to fit the light response curve,and the optimal model was screened out by analyzing the degree of approximation between fitted value and measured value. The results showed that,with the right increase of zinc fertilizer amount,the photosynthetic characteristic parameters of flue-cured tobacco including the maximum net photosynthetic rate,the dark respiratory rate,the light saturation point,and so on,were increased,and the leaf photosynthetic capacity significantly improved. But when the zinc fertilizer amount was excessive,the characteristic parameters decreased. The fitting effect order of three models under different zinc fertilizer levels of flue-cured tobacco in mature central leaves was rectangle hyperbola model > non-rectangle hyperbola model > hyperbolic correction model. Thus photosynthetic characteristic parameter of hyperboliccorrection model was the most abundant. Under different zinc fertilizer levels,the hyperbolic correction model was the best light-response curve model.

关 键 词：烤烟 辞肥 光响应曲线 

分 类 号：S572[农业科学—烟草工业]