夏玉米光合特性及光响应曲线拟合

doi:10.17521/cjpe.2016.0082

摘要/Abstract

摘要：

通过对光合-光响应曲线的研究来探索光合有效辐射与净光合速率的关系是一种非常重要的手段。合适的模型才能较好地反映植株的光合特性。分析由于生育期与叶位的不同而导致各模型拟合值与实测值差异的变化性以及不同光合有效辐射强度下各模型的适用性, 可为夏玉米(Zea mays)光合模型的选择和光合-光响应曲线模型的进一步优化提供参考。该研究运用3种典型的光合模型对夏玉米大喇叭口期与乳熟期上部叶、穗位叶与下部叶做光合-光响应曲线拟合, 对比各模型的拟合度以及对实测数据的反映情况, 并将光合有效辐射分为3段, 分析3种模型在每段的拟合残差。结果表明: 最大净光合速率(P_nmax)、饱和光强(I_sat)、暗呼吸速率(R_d)等光合特征参数值随叶位由上而下呈降低趋势, 乳熟期普遍小于大喇叭口期; 不同生育期和叶位3种模型均可以拟合, 直角双曲线模型、非直角双曲线模型对P_nmax、I_sat的拟合值与实测值有一定的偏差; 通过残差分析表明叶子飘模型的拟合值与实测值最为相符, 尤其对高光部分的拟合表现出独有的优越性。

关键词: 光合特征参数, 叶子飘模型, 饱和光强, 残差

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 (P_nmax), saturated light intensity (I_sat) and dark respiration rate (R_d) 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 P_nmax and I_sat 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.

Key words: photosynthetic characteristic parameters, Ye Zi-Piao model, saturated irradiance, residue

李力, 张祥星, 郑睿, 郭建青. 夏玉米光合特性及光响应曲线拟合. 植物生态学报, 2016, 40(12): 1310-1318. DOI: 10.17521/cjpe.2016.0082

Li LI, Xiang-Xing ZHANG, Rui ZHENG, Jian-Qing GUO. Photosynthetic characteristics and photosynthesis-light response curve models of summer maize. Chinese Journal of Plant Ecology, 2016, 40(12): 1310-1318. DOI: 10.17521/cjpe.2016.0082

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2016.0082

https://www.plant-ecology.com/CN/Y2016/V40/I12/1310

图/表 4

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时期 Period	叶位 Leaf position	表观量子效率 AQE (μmol CO₂·μmol^-1 photons)	最大净光合速率 P_nmax (μmol·m^-2·s^-1)	饱和光强 I_sat (μmol·m^-2·s^-1)	光补偿点 I_c (μmol·m^-2·s^-1)	暗呼吸速率 R_d (μmol·m^-2·s^-1)
大喇叭口期 Bell stage	上部叶 Upper leaf	0.061^a	36.78^a	2 000^a	48.87^a	3.36^a
大喇叭口期 Bell stage	穗位叶 Leaf at ear of grain	0.057^b	36.99^a	2 000^a	49.14^a	3.25^a
	下部叶 Lower leaf	0.051^c	24.20^b	1 800^b	43.40^b	2.63^b
	上部叶 Upper leaf	0.053^a	19.70^a	1 800^a	32.29^a	2.24^a
乳熟期 Milk stage	穗位叶 Leaf at ear of grain	0.042^b	18.66^a	1 800^a	32.32^a	1.74^b
	下部叶 Lower leaf	0.040^c	16.44^b	1 800^a	31.43^a	1.50^c

时期 Period	叶位 Leaf position	表观量子效率 AQE (μmol CO₂·μmol^-1 photons)	最大净光合速率 P_nmax (μmol·m^-2·s^-1)	饱和光强 I_sat (μmol·m^-2·s^-1)	光补偿点 I_c (μmol·m^-2·s^-1)	暗呼吸速率 R_d (μmol·m^-2·s^-1)
大喇叭口期 Bell stage	上部叶 Upper leaf	0.061^a	36.78^a	2 000^a	48.87^a	3.36^a
大喇叭口期 Bell stage	穗位叶 Leaf at ear of grain	0.057^b	36.99^a	2 000^a	49.14^a	3.25^a
	下部叶 Lower leaf	0.051^c	24.20^b	1 800^b	43.40^b	2.63^b
	上部叶 Upper leaf	0.053^a	19.70^a	1 800^a	32.29^a	2.24^a
乳熟期 Milk stage	穗位叶 Leaf at ear of grain	0.042^b	18.66^a	1 800^a	32.32^a	1.74^b
	下部叶 Lower leaf	0.040^c	16.44^b	1 800^a	31.43^a	1.50^c

时期 Period	叶位 Leaf position	模型 Model	初始量子效率 α (μmol CO₂· μmol^-1photons)	最大净光合速率 P_nmax (μmol·m^-2·s^-1)	饱和光强 I_sat (μmol·m^-2·s^-1)	光补偿点 I_c (μmol·m^-2·s^-1)	暗呼吸速率 R_d (μmol·m^-2·s^-1)	决定系数 Determination coefficient
	上部叶 Upper leaf	直角双曲线 Rectangular hyperbolic	0.083^a	55.89^Aa	997^Aa	48.35^Aa	3.70^Aa	0.998
	上部叶 Upper leaf	非直角双曲线 Non-rectangular hyperbolic	0.064^b	48.70^Ab	846^Ab	49.33^Aa	3.06^Ab	0.998
		叶子飘模型 Ye Zi-Piao model	0.068^c	37.12^Bc	2 235^Bc	48.71^Aa	3.15^Ab	0.999
		测量值 Measured data	-	36.78^B	2 000^B	48.87^A	3.36^B	-
		直角双曲线 Rectangular hyperbolic	0.079^a	57.44^Aa	1 071^Aa	50.01^Aa	3.65^Aa	0.997
大喇叭口期 Bell stage	穗位叶 Leaf at ear of	非直角双曲线 Non-rectangular hyperbolic	0.057^b	47.35^Ab	880^Ab	50.75^Aa	2.83^Ab	0.998
	grain	叶子飘模型 Ye Zi-Piao model	0.063^c	37.10^Bc	2 061^Ac	50.23^Aa	3.01^Ac	0.999
		测量值 Measured data	-	36.99^B	2 000^B	49.14^A	3.25^B	-
		直角双曲线 Rectangular hyperbolic	0.090^a	33.93^Aa	729^Aa	41.46^Aa	3.27^Aa	0.996
	下部叶 Lower leaf	非直角双曲线 Non-rectangular hyperbolic	0.059^b	29.56^Ab	628^Ab	44.14^Aa	2.50^Ba	0.999
		叶子飘模型 Ye Zi-Piao model	0.070^c	24.18^Bc	1 789^Bc	42.98^Aa	2.76^Bb	0.999
		测量值 Measured data	-	24.20^B	1 800^B	43.40^A	2.63^B	-
		直角双曲线 Rectangular hyperbolic	0.102^a	25.30^Aa	540^Aa	31.31^Aa	2.71^Aa	0.997
	上部叶	非直角双曲线 Non-rectangular hyperbolic	0.076^b	23.90^Bb	499^Aa	32.29^Aa	2.29^Bb	0.999
	Upper leaf	叶子飘模型 Ye Zi-Piao model	0.089^c	22.71^Bb	1 973^Bb	31.63^Aa	2.45^Ba	0.998
		测量值 Measured data	-	19.70^B	1 800^B	32.29^Aa	2.24^B	-
		直角双曲线 Rectangular hyperbolic	0.076^a	24.94^Aa	645^Aa	32.09^Aa	2.16^Aa	0.996
乳熟期 Milk stage	穗位叶 Leaf at ear of	非直角双曲线 Non-rectangular hyperbolic	0.050^b	20.02^Ab	561^Ab	32.88^Aa	1.59^Bb	0.998
	grain	叶子飘模型 Ye Zi-Piao model	0.062^c	18.55^Bc	1 819^Bc	32.36^Aa	1.83^Bb	0.999
		测量值 Measured data	-	18.66^B	1 800^B	32.32^A	1.74^B	-
		直角双曲线 Rectangular hyperbolic	0.073^a	21.88^Aa	595^Aa	30.41^Aa	1.92^Aa	0.996
	下部叶 Lower leaf	非直角双曲线 Non-rectangular hyperbolic	0.049^b	19.67^Ab	528^Ab	30.81^Aa	1.45^Bb	0.998
		叶子飘模型 Ye Zi-Piao model	0.059^c	16.45^Bc	1 777^Bc	30.40^Aa	1.61^Bb	0.999
		测量值 Measured data	-	16.44^B	1 800^B	31.43^A	1.50^B	-

时期 Period	叶位 Leaf position	模型 Model	初始量子效率 α (μmol CO₂· μmol^-1photons)	最大净光合速率 P_nmax (μmol·m^-2·s^-1)	饱和光强 I_sat (μmol·m^-2·s^-1)	光补偿点 I_c (μmol·m^-2·s^-1)	暗呼吸速率 R_d (μmol·m^-2·s^-1)	决定系数 Determination coefficient
	上部叶 Upper leaf	直角双曲线 Rectangular hyperbolic	0.083^a	55.89^Aa	997^Aa	48.35^Aa	3.70^Aa	0.998
	上部叶 Upper leaf	非直角双曲线 Non-rectangular hyperbolic	0.064^b	48.70^Ab	846^Ab	49.33^Aa	3.06^Ab	0.998
		叶子飘模型 Ye Zi-Piao model	0.068^c	37.12^Bc	2 235^Bc	48.71^Aa	3.15^Ab	0.999
		测量值 Measured data	-	36.78^B	2 000^B	48.87^A	3.36^B	-
		直角双曲线 Rectangular hyperbolic	0.079^a	57.44^Aa	1 071^Aa	50.01^Aa	3.65^Aa	0.997
大喇叭口期 Bell stage	穗位叶 Leaf at ear of	非直角双曲线 Non-rectangular hyperbolic	0.057^b	47.35^Ab	880^Ab	50.75^Aa	2.83^Ab	0.998
	grain	叶子飘模型 Ye Zi-Piao model	0.063^c	37.10^Bc	2 061^Ac	50.23^Aa	3.01^Ac	0.999
		测量值 Measured data	-	36.99^B	2 000^B	49.14^A	3.25^B	-
		直角双曲线 Rectangular hyperbolic	0.090^a	33.93^Aa	729^Aa	41.46^Aa	3.27^Aa	0.996
	下部叶 Lower leaf	非直角双曲线 Non-rectangular hyperbolic	0.059^b	29.56^Ab	628^Ab	44.14^Aa	2.50^Ba	0.999
		叶子飘模型 Ye Zi-Piao model	0.070^c	24.18^Bc	1 789^Bc	42.98^Aa	2.76^Bb	0.999
		测量值 Measured data	-	24.20^B	1 800^B	43.40^A	2.63^B	-
		直角双曲线 Rectangular hyperbolic	0.102^a	25.30^Aa	540^Aa	31.31^Aa	2.71^Aa	0.997
	上部叶	非直角双曲线 Non-rectangular hyperbolic	0.076^b	23.90^Bb	499^Aa	32.29^Aa	2.29^Bb	0.999
	Upper leaf	叶子飘模型 Ye Zi-Piao model	0.089^c	22.71^Bb	1 973^Bb	31.63^Aa	2.45^Ba	0.998
		测量值 Measured data	-	19.70^B	1 800^B	32.29^Aa	2.24^B	-
		直角双曲线 Rectangular hyperbolic	0.076^a	24.94^Aa	645^Aa	32.09^Aa	2.16^Aa	0.996
乳熟期 Milk stage	穗位叶 Leaf at ear of	非直角双曲线 Non-rectangular hyperbolic	0.050^b	20.02^Ab	561^Ab	32.88^Aa	1.59^Bb	0.998
	grain	叶子飘模型 Ye Zi-Piao model	0.062^c	18.55^Bc	1 819^Bc	32.36^Aa	1.83^Bb	0.999
		测量值 Measured data	-	18.66^B	1 800^B	32.32^A	1.74^B	-
		直角双曲线 Rectangular hyperbolic	0.073^a	21.88^Aa	595^Aa	30.41^Aa	1.92^Aa	0.996
	下部叶 Lower leaf	非直角双曲线 Non-rectangular hyperbolic	0.049^b	19.67^Ab	528^Ab	30.81^Aa	1.45^Bb	0.998
		叶子飘模型 Ye Zi-Piao model	0.059^c	16.45^Bc	1 777^Bc	30.40^Aa	1.61^Bb	0.999
		测量值 Measured data	-	16.44^B	1 800^B	31.43^A	1.50^B	-

光合有效辐射 PAR (μmol·m^-2·s^-1)	0-200	400-1 000	1 200-2 000
直角双曲线 Rectangular hyperbolic	0.75	1.15	1.92
非直角双曲线 Non-rectangular hyperbolic	0.40	0.31	0.50
叶子飘模型 Ye Zi-Piao model	0.28	0.14	0.05