不同锌肥水平对烤烟光合特性和产量及质量的影响

为探究不同锌肥水平对烤烟光合特性和产量及质量的影响,以烤烟K326为研究对象,采用双曲线修正模型对光响应曲线进行拟合,得出了烟株成熟期中部叶的光响应特征参数。通过分析拟合出的光和特征参数和产量及质量的对比,选出适宜当地的锌肥施用水平。结果表明,随着锌肥适量的增施,光合特征参数有所上升,烤烟叶片的光合能力和产量及质量均有明显的提高,但当锌肥过量时光合特征参数反而下降,产量及质量反而降低。因此,本试验条件下,锌肥施用量为15 kg/hm~2处理能较为显著地提高烤烟的光合特征参数和产量及质量。

Effects of different zinc fertilizer levels on photosynthetic characteristics and yield and quality of flue cured tobacco

In order to research the effects of different zinc fertilizer levels on photosynthetic characteristics and yield and quality of flue-cured tobacco,the light response curve of central leaves of tobacco plants in maturity period were studied using the flue-cured tobacco K326 as the research object.The hyperbolic correction model was used to be screened out the optimal model via analyzing the degree of approximation in fitted value and measured value.The main results showed that,with the increasing of zinc fertilizer amount,photosynthetic characteristic parameters increased,yield,quality and photosynthetic capacity of flue-cured tobacco were obvious improved.But when zinc was excessive applied,photosynthetic characteristic parameters,yield and quality were all decreased.The application rate of 15 kg/hm2 Zn fertilizer significantly improved the photosynthetic rate and yield and quality of flue-cured tobacco.