摘要
运用4种光合作用光响应模型拟合5种榆属植物的光响应数据,对比分析各光响应模型的基本特征参数,探究各模型间及不同榆树间的差异。结果表明,同种榆树的光响应曲线拟合结果在不同模型中存在差异。不同模型对同一种榆树的光响应曲线的拟合结果存在差异;不同榆树的光响应曲线在同一模型中的拟合效果也不同。4种模型中,直角双曲线光响应修正模型(模型Ⅲ)的拟合程度最好,可以反映光抑制现象,但光补偿点、最大净光合速率等特征参数与测量值差异较大。综合分析可知,指数模型(模型Ⅳ)为最优模型。通过对比光合能力可看出最大为黑榆,最小为大果榆。通径分析说明,对不同榆树净光合速率有影响的作用方式及主导因子存在较大差异。
Using light response curves of photosynthesis for 5 Ulmus plants fitted by 4 kinds of photosynthesis fight response models, this paper contrasted the main characteristic parameters of the model of the optical response to explore the difference of each model and different Ulmus.The results showed that the fitting results of different models for the same plant were different, so was the same model for different plants. The rectangular hyperbola correction model＇s （ model m ） fitting degree was the best of the four kinds of models that could reflect the phenomenon of photoinhibition of plants, but the maximum net photosynthetic rate and light compensation point were greatly different with measurements. The summary of this study indicated that exponential model （ model IV ） was the best model of photosynthetic light-response curve of the 5 Ulmus. The photosynthetic capacity of Ulmus davidiana Planch was the largest, Ulmus macrocarpa is minimal. Path analysis showed that the dominant factors affecting the photosynthetic were different.
出处
《中国农业科技导报》
CAS
CSCD
北大核心
2016年第4期124-131,共8页
Journal of Agricultural Science and Technology
基金
国家自然科学基金项目(31370664)资助
关键词
榆树
光响应曲线
模型
通径分析
光合能力
Ulmus
Light response curves
model
path analysis
photosynthetic capacity
