• 研究论文 •

夏玉米光合特性及光响应曲线拟合

1. 1长安大学环境科学与工程学院, 西安 710054
2旱区地下水文与生态效应教育部重点实验室, 西安 710054
• 出版日期:2016-12-10 发布日期:2016-12-30
• 通讯作者: 郑睿
• 基金资助:
国家自然科学基金(51409006)

Photosynthetic characteristics and photosynthesis-light response curve models of summer maize

Li LI1, Xiang-Xing ZHANG1, Rui ZHENG1,2,*, Jian-Qing GUO1,2

1. 1School of Environmental Science & Engineering, Chang’an University, Xi’an 710054, China;
and
2Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Xi’an 710054, China;
• Online:2016-12-10 Published:2016-12-30
• Contact: Rui ZHENG

被引次数

5 | 15

Abstract:

Aim The photosynthesis-light response curve is the most commonly used method to explore the relationship between photosynthetically active radiation and the net photosynthetic rate, because it is more effective to reflect the plant photosynthetic characteristics. And it is very meaningful for researchers to choose a suitable summer corn (Zea mays) photosynthetic model and optimal the models of photosynthesis-light response curve by analyzing the differences between simulation and observation in each growth period of some plant. So the object of this paper was to propose some useful suggestions for the choice of summer corn photosynthetic modes and the optimization of the photosynthetic light response curves model in further.Methods In this paper, three typical photosynthetic models were used to fitting the photosynthetic light response curve for upper leaf, leaf at ear of grain and lower leaf of summer corn during bell and milk period. And then the fitting degree of each model was compared to the measured data. Photosynthetic active radiation was divided into three parts, and the fitting residual errors of these three models were analyzed individually.Important findings The photosynthetic characteristic parameters such as maximum net photosynthetic rate (Pnmax), saturated light intensity (Isat) and dark respiration rate (Rd) decreased constantly with a top-down leaf position and the parameters at milk stage were generally lower than the bell stage. Each growth period and leaf position could fit the curve, but some deviation exists for the Pnmax and Isat in the rectangular hyperbolic model and the non-rectangular hyperbolic model. The results of curve fitting residual showed that the simulation values from Ye Zi-Piao model were closest to the actual values, and especially for the high photosynthetically active radiation section.