植物生态学报 ›› 2008, Vol. 32 ›› Issue (3): 664-672.DOI: 10.3773/j.issn.1005-264x.2008.03.016
收稿日期:
2006-11-23
接受日期:
2007-12-20
出版日期:
2008-11-23
发布日期:
2008-05-30
通讯作者:
曹卫星
作者简介:
*E- mail:caow@njau.edu.cn基金资助:
JU Chang-Hua, TIAN Yong-Chao, ZHU Yan, YAO Xia, CAO Wei-Xing()
Received:
2006-11-23
Accepted:
2007-12-20
Online:
2008-11-23
Published:
2008-05-30
Contact:
CAO Wei-Xing
摘要:
运用导数光谱分析技术,研究了不同氮肥水平下不同品种油菜(Brassica napus)的叶面积指数(Leaf area index, LAI)及角果皮面积指数(Pod area index,PAI)与冠层导数光谱及其衍生参数的定量关系。结果表明,油菜导数光谱与花前LAI和花后PAI均有良好的相关关系,在750 nm附近相关关系最好,相关系数达到0.9左右。三边参数与油菜LAI和PAI的相关性顺序为:红边>黄边>蓝边,面积参数>振幅参数>位置参数。油菜红边导数光谱的双峰现象降低了红边位置对油菜LAI和PAI的敏感程度,利用线性外推法拟合红边位置能提高其对油菜LAI和PAI的敏感程度。在三边参数及其衍生参数中,红边面积及其与蓝边面积的差与LAI及PAI的相关性最好,且适用于该研究中使用的不同品种。因此,750 nm处的一阶导数光谱、红边面积及其与蓝边面积的差可用于有效地监测油菜的光合器官面积。
鞠昌华, 田永超, 朱艳, 姚霞, 曹卫星. 油菜光合器官面积与导数光谱特征的相关关系. 植物生态学报, 2008, 32(3): 664-672. DOI: 10.3773/j.issn.1005-264x.2008.03.016
JU Chang-Hua, TIAN Yong-Chao, ZHU Yan, YAO Xia, CAO Wei-Xing. RELATIONSHIP BETWEEN DERIVATIVE SPECTRA AND PHOTOSYNTHETIC ORGAN AREA IN RAPESEED (BRASSICA NAPUS). Chinese Journal of Plant Ecology, 2008, 32(3): 664-672. DOI: 10.3773/j.issn.1005-264x.2008.03.016
分类 Classification | 光谱参数 Spectral parameter | 定义 Definition | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
特征导数光谱 Characteristic derivative spectra | 导数光谱 fdλ | 特征波段λ处的一阶导数值 First derivative spectral value at the position of characteristic wavelength λ | ||||||||||||||||
三边参数 Three-edge parameters | 蓝边振幅 Db | 蓝边490~530 nm内一阶导数光谱中的最大值 Maximum value of first derivative spectra within blue edge area 490-530 nm | ||||||||||||||||
蓝边位置 BEP | Db对应的波长位置 Wavelength position of Db (nm) | |||||||||||||||||
蓝边面积 SDb | 蓝边波长范围内一阶导数波段值的总和 Sum of first derivative values within blue edge area | |||||||||||||||||
黄边振幅 Dy | 黄边550~580 nm内一阶导数光谱中的最大值 Maximum value of first derivative spectra within yellow edge area 550-580 nm | |||||||||||||||||
黄边位置 YEP | Dy对应的波长位置 Wavelength position of Dy (nm) | |||||||||||||||||
黄边面积 SDy | 黄边波长范围内一阶导数波段值的总和 Sum of first derivative values within yellow edge area | |||||||||||||||||
红边振幅 Dr | 红边680~755 nm内一阶导数光谱中的最大值 Maximum value of first derivative spectra within red edge area 680-755 nm | |||||||||||||||||
红边位置 REP | Dr对应的波长位置 Wavelength position of Dr (nm) | |||||||||||||||||
红边面积 SDr | 红边波长范围内一阶导数波段值的总和 Sum of first derivative value within red edge area | |||||||||||||||||
特征导数光谱衍生参数 Parameters derived from characteristic derivative spectra | 导数光谱差 Dfd(λ1,λ2) | fdλ1 - fdλ2 | ||||||||||||||||
导数光谱比 Rfd(λ1,λ2) | fdλ1/fdλ2 | |||||||||||||||||
归一化导数光谱差 NDfd(λ1,λ2) | (fdλ1 - fdλ2)/(fdλ1 + fdλ2) | |||||||||||||||||
三边参数衍生参数 Parameters derived from three-edge parameter | 红蓝边振幅差 DDr,b | Dr-Db | ||||||||||||||||
红蓝边振幅比 RDr,b | Dr/Db | |||||||||||||||||
归一化红蓝边振幅差 NDDr,b | (Dr-Db)/(Dr+Db) | |||||||||||||||||
红蓝边面积差 DSDr,b | SDr-SDb | |||||||||||||||||
红蓝边面积比 RSDr,b | SDr/SDb | |||||||||||||||||
归一化红蓝边面积差 NDSDr,y | (SDr - SDb)/(SDr + SDb) | |||||||||||||||||
红黄边振幅差 DDr,y | Dr-Dy | |||||||||||||||||
红黄边振幅比 RDr,y | Dr/Dy | |||||||||||||||||
归一化红黄边振幅差 NDDr,y | (Dr-Dy)/(Dr+Dy) | |||||||||||||||||
红黄边面积差 DSDr,y | SDr-SDy | |||||||||||||||||
红黄边面积比 RSDr,y | SDr/SDy | |||||||||||||||||
归一化红黄边面积差 NDSDr,y | (SDr-SDy)/(SDr+SDy) |
表1 本研究所用导数光谱参数的定义
Table 1 Definition of derivative spectral parameters used in the present study
分类 Classification | 光谱参数 Spectral parameter | 定义 Definition | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
特征导数光谱 Characteristic derivative spectra | 导数光谱 fdλ | 特征波段λ处的一阶导数值 First derivative spectral value at the position of characteristic wavelength λ | ||||||||||||||||
三边参数 Three-edge parameters | 蓝边振幅 Db | 蓝边490~530 nm内一阶导数光谱中的最大值 Maximum value of first derivative spectra within blue edge area 490-530 nm | ||||||||||||||||
蓝边位置 BEP | Db对应的波长位置 Wavelength position of Db (nm) | |||||||||||||||||
蓝边面积 SDb | 蓝边波长范围内一阶导数波段值的总和 Sum of first derivative values within blue edge area | |||||||||||||||||
黄边振幅 Dy | 黄边550~580 nm内一阶导数光谱中的最大值 Maximum value of first derivative spectra within yellow edge area 550-580 nm | |||||||||||||||||
黄边位置 YEP | Dy对应的波长位置 Wavelength position of Dy (nm) | |||||||||||||||||
黄边面积 SDy | 黄边波长范围内一阶导数波段值的总和 Sum of first derivative values within yellow edge area | |||||||||||||||||
红边振幅 Dr | 红边680~755 nm内一阶导数光谱中的最大值 Maximum value of first derivative spectra within red edge area 680-755 nm | |||||||||||||||||
红边位置 REP | Dr对应的波长位置 Wavelength position of Dr (nm) | |||||||||||||||||
红边面积 SDr | 红边波长范围内一阶导数波段值的总和 Sum of first derivative value within red edge area | |||||||||||||||||
特征导数光谱衍生参数 Parameters derived from characteristic derivative spectra | 导数光谱差 Dfd(λ1,λ2) | fdλ1 - fdλ2 | ||||||||||||||||
导数光谱比 Rfd(λ1,λ2) | fdλ1/fdλ2 | |||||||||||||||||
归一化导数光谱差 NDfd(λ1,λ2) | (fdλ1 - fdλ2)/(fdλ1 + fdλ2) | |||||||||||||||||
三边参数衍生参数 Parameters derived from three-edge parameter | 红蓝边振幅差 DDr,b | Dr-Db | ||||||||||||||||
红蓝边振幅比 RDr,b | Dr/Db | |||||||||||||||||
归一化红蓝边振幅差 NDDr,b | (Dr-Db)/(Dr+Db) | |||||||||||||||||
红蓝边面积差 DSDr,b | SDr-SDb | |||||||||||||||||
红蓝边面积比 RSDr,b | SDr/SDb | |||||||||||||||||
归一化红蓝边面积差 NDSDr,y | (SDr - SDb)/(SDr + SDb) | |||||||||||||||||
红黄边振幅差 DDr,y | Dr-Dy | |||||||||||||||||
红黄边振幅比 RDr,y | Dr/Dy | |||||||||||||||||
归一化红黄边振幅差 NDDr,y | (Dr-Dy)/(Dr+Dy) | |||||||||||||||||
红黄边面积差 DSDr,y | SDr-SDy | |||||||||||||||||
红黄边面积比 RSDr,y | SDr/SDy | |||||||||||||||||
归一化红黄边面积差 NDSDr,y | (SDr-SDy)/(SDr+SDy) |
叶面积指数 Leaf area index (LAI) | 角果皮面积指数 Pod area index (PAI) | ||||||
---|---|---|---|---|---|---|---|
2月22日 22 Feb. | 3月4日 4 Mar. | 3月14日 14 Mar. | 3月25日 25 Mar. | 4月27日 27 Apr. | 5月2日 2 May | ||
氮水平 Nitrogen level | N0 | 0.21a | 0.28a | 0.60a | 0.80a | 1.08a | 1.13a |
N1 | 0.75b | 0.64a | 1.27ab | 1.53a | 1.79b | 1.62b | |
N2 | 1.38c | 1.44b | 1.94b | 2.52b | 2.35c | 2.03b | |
N3 | 1.79c | 1.83b | 3.89c | 4.14c | 2.76d | 3.08c | |
处理 Treatment | F | 21.37 | 28.08 | 28.5 | 35.79 | 40.63 | 32.1 |
F0.01 | 6.99 | 5.42 | 5.42 | 5.42 | 5.42 | 5.42 |
表2 不同施氮水平下油菜光合器官面积的统计分析
Table 2 Statistical analyses of photosynthetic organ areas in rapeseed (Brassica napus) under different fertilizer rates
叶面积指数 Leaf area index (LAI) | 角果皮面积指数 Pod area index (PAI) | ||||||
---|---|---|---|---|---|---|---|
2月22日 22 Feb. | 3月4日 4 Mar. | 3月14日 14 Mar. | 3月25日 25 Mar. | 4月27日 27 Apr. | 5月2日 2 May | ||
氮水平 Nitrogen level | N0 | 0.21a | 0.28a | 0.60a | 0.80a | 1.08a | 1.13a |
N1 | 0.75b | 0.64a | 1.27ab | 1.53a | 1.79b | 1.62b | |
N2 | 1.38c | 1.44b | 1.94b | 2.52b | 2.35c | 2.03b | |
N3 | 1.79c | 1.83b | 3.89c | 4.14c | 2.76d | 3.08c | |
处理 Treatment | F | 21.37 | 28.08 | 28.5 | 35.79 | 40.63 | 32.1 |
F0.01 | 6.99 | 5.42 | 5.42 | 5.42 | 5.42 | 5.42 |
图1 不同施氮水平下的油菜冠层反射光谱(A)及一阶导数光谱(B) N0、N1、N2、N3:见表2 See Table 2
Fig.1 Canopy reflectance spectra (A) and first derivative spectra (B) at different nitrogen levels in rapeseed (Brassica napus)
图2 油菜叶面积指数(LAI)(A)和角果皮面积指数(PAI)(B)与冠层反射光谱和一阶导数光谱的相关关系(n=80,48) LAI-r:表示叶面积指数与原始反射光谱的相关关系 Showing relationship between LAI and reflectance LAI-fd:表示叶面积指数与一阶导数光谱的相关关系 Showing relationship between LAI and first derivative spectra PAI-r:表示角果皮面积指数与原始反射光谱的相关关系 Showing relationship between PAI and reflectance PAI-fd:表示角果皮面积指数与一阶导数光谱的相关关系 Showing relationship between PAI and first derivative spectra F0.01、F0.05:分别表示0.01和0.05水平的显著差异Showing significant differences at 0.01 and 0.05 probability levels, respectively
Fig.2 Correlations of leaf area index (LAI) (A) and pod area index (PAI) (B) to canopy reflectance and first derivative spectra in rapeseed (Brassica napus) (n=80,48)
图3 油菜叶面积指数(LAI)(A)和角果皮面积指数(PAI)(B)与750 nm波段的一阶导数光谱fd750的相关关系(n=80,48) **:0.01水平的显著 Showing the 0.01 significant level
Fig.3 Correlations of leaf area index (LAI) (A) and pod area index (PAI) (B) to first derivative spectra at 750 nm (fd750) in rapeseed (Brassica napus) (n=80,48)
光谱参数 Spectral parameter | 导数光谱 差(750,530) Dfd(750,530) | 导数光谱 比(750,530) Rfd(750,530) | 归一化导数光 谱差(750,530) NDfd(750,530) | 导数光谱 差(750,560) Dfd(750,560) | 导数光谱 比(750,560) Rfd(750,560) | 归一化导数光 谱差(750,560) NDfd(750,560) |
---|---|---|---|---|---|---|
相关系数 Correlation coefficient | 0.851 | 0.714 | 0.825 | 0.870 | 0.352 | 0.259 |
表3 一阶导数衍生参数与油菜叶面积指数(LAI)的相关关系
Table 3 Correlation of leaf area index (LAI) to spectral parameters derived from first derivative spectra in rapeseed (Brassica napus) (n=80)
光谱参数 Spectral parameter | 导数光谱 差(750,530) Dfd(750,530) | 导数光谱 比(750,530) Rfd(750,530) | 归一化导数光 谱差(750,530) NDfd(750,530) | 导数光谱 差(750,560) Dfd(750,560) | 导数光谱 比(750,560) Rfd(750,560) | 归一化导数光 谱差(750,560) NDfd(750,560) |
---|---|---|---|---|---|---|
相关系数 Correlation coefficient | 0.851 | 0.714 | 0.825 | 0.870 | 0.352 | 0.259 |
油菜叶面积指数LAI | 角果皮面积指数PAI | |||||||
---|---|---|---|---|---|---|---|---|
光谱参数 Spectral parameter | 相关系数 Correlation coefficient | 光谱参数 Spectral parameter | 相关系数 Correlation coefficient | 光谱参数 Spectral parameter | 相关系数 Correlation coefficient | 光谱参数 Spectral parameter | 相关系数 Correlation coefficient | |
Db | 0.648** | SDy | -0.751** | Db | -0.112 | SDy | -0.357* | |
BEP | 0.342** | Dr | 0.816** | BEP | 0.112 | Dr | 0.725** | |
SDb | 0.572** | REP | 0.489** | SDb | -0.199 | REP | 0.192 | |
Dy | -0.747** | SDr | 0.822** | Dy | -0.280 | SDr | 0.756** | |
YEP | 0.302** | REP(le) | 0.803** | YEP | -0.234 | REP(le) | 0.768** | |
DDr,b | 0.824** | DSDr,b | 0.826** | DDr,b | 0.785** | DSDr,b | 0.796** | |
DDr,y | 0.811** | DSDr,y | 0.819** | DDr,y | 0.698** | DSDr,y | 0.728** | |
RDr,b | 0.784** | RSDr,b | 0.788** | RDr,b | 0.778** | RSDr,b | 0.783** | |
RDr,y | 0.174 | RSDr,y | -0.310** | RDr,y | 0.666** | RSDr,y | 0.526** | |
NDDr,b | 0.734** | NDSDr,b | -0.684** | NDDr,b | 0.763** | NDSDr,b | 0.759** | |
NDDr,y | -0.206 | NDSDr,y | -0.476** | NDDr,y | 0.670** | NDSDr,y | 0.506** |
表4 三边参数及其衍生参数与油菜叶面积指数和角果皮面积指数的相关关系
Table 4 Correlations of leaf area index (LAI) and pod area index (PAI) to three edge parameters and its derivatives in rapeseed (Brassica napus) (n=80, 48)
油菜叶面积指数LAI | 角果皮面积指数PAI | |||||||
---|---|---|---|---|---|---|---|---|
光谱参数 Spectral parameter | 相关系数 Correlation coefficient | 光谱参数 Spectral parameter | 相关系数 Correlation coefficient | 光谱参数 Spectral parameter | 相关系数 Correlation coefficient | 光谱参数 Spectral parameter | 相关系数 Correlation coefficient | |
Db | 0.648** | SDy | -0.751** | Db | -0.112 | SDy | -0.357* | |
BEP | 0.342** | Dr | 0.816** | BEP | 0.112 | Dr | 0.725** | |
SDb | 0.572** | REP | 0.489** | SDb | -0.199 | REP | 0.192 | |
Dy | -0.747** | SDr | 0.822** | Dy | -0.280 | SDr | 0.756** | |
YEP | 0.302** | REP(le) | 0.803** | YEP | -0.234 | REP(le) | 0.768** | |
DDr,b | 0.824** | DSDr,b | 0.826** | DDr,b | 0.785** | DSDr,b | 0.796** | |
DDr,y | 0.811** | DSDr,y | 0.819** | DDr,y | 0.698** | DSDr,y | 0.728** | |
RDr,b | 0.784** | RSDr,b | 0.788** | RDr,b | 0.778** | RSDr,b | 0.783** | |
RDr,y | 0.174 | RSDr,y | -0.310** | RDr,y | 0.666** | RSDr,y | 0.526** | |
NDDr,b | 0.734** | NDSDr,b | -0.684** | NDDr,b | 0.763** | NDSDr,b | 0.759** | |
NDDr,y | -0.206 | NDSDr,y | -0.476** | NDDr,y | 0.670** | NDSDr,y | 0.506** |
图4 油菜叶面积指数(LAI)(A)及角果皮面积指数(PAI)(B)与红边位置(Ⅰ)及线性外推拟合的红边位置(Ⅱ)的关系 **: 见图3 See Fig. 3
Fig.4 Relationships of leaf area index (LAI)(A)and pod area index (PAI)(B) to red edge position (REP) (Ⅰ) andREP extracted from linear extrapolation method (REP(le) (Ⅱ) in rapeseed (Brassica napus)
图5 油菜叶面积指数(LAI)(A)和角果皮面积指数(PAI)(B)与红边面积(Ⅰ)及红蓝边面积差(Ⅱ)的关系
Fig.5 Relationships of leaf area index (LAI) (A) and pod area index (PAI) (B) to red edge area (SDr) (Ⅰ) and difference of red edge area and blue edge area (DSDr,b) (Ⅱ) in rapeseed (Brassica napus)
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