激光生物学报, 2013, 22 (6): 528, 网络出版: 2015-07-21  

基于光谱变化特征的小麦叶片不同功能期监测研究

Study on Monitoring Different Functionally Period of Leaf Based on Variation of Spectral Characteristics in Wheat
何丽香 1,2,*傅兆麟 1,2宫晶 1,2孙常玉 1,2
作者单位
1 淮北师范大学生命科学学院, 安徽 淮北 235000
2 安徽省资源植物重点实验室, 安徽 淮北 235000
摘要
为了探讨小麦叶片不同功能期光谱变化特征与叶绿素含量之间的关系, 以4个小麦杂交组合基因型为试验材料, 对不同生长发育期的旗叶进行光谱和叶绿素测量, 并采用线性外推法计算其红边位置。结果表明: 在近红外区(750 nm~850 nm)和可见光区(500 nm~600 nm)处, 从抽穗期到扬花期小麦旗叶光谱反射率呈现上升趋势, 到灌浆期开始下降。其叶绿素含量也是先上升, 进入灌浆期后开始下降。建立旗叶4个不同功能期4月25日、5月1日、5月6日和5月11日叶绿素含量与其红边位置线性回归模型, 其R2分别为0.5893、0.8842、0.9379和0.7258, 均达极显著水平, 表明此模型可用于叶片叶绿素含量无损监测。
Abstract
To research the relationship between chlorophyll content and spectral characteristics, the experiments were carried out with the 4 wheat hybrid genotypes, the spectral reflectance and chlorophyll content were detected at different growth stages, and calculated red edge position with linear extrapolation technique.The results showed that: in the near infrared region (750 nm~850 nm) and visible (500 nm~600 nm), spectral reflectance of flag leaf increased from heading stage to flower stage, started to decline at filling stage.For the chlorophyll content, the variation tendency is in consistent with the above situation. The regression model of chlorophyll content with the red edge position were built for the 4 different functional period of flag leaf at April 25th, May 1st, May 6th and May 11th, and the R2 were respectively 0.5893, 0.8842, 0.9379 and 0.7258, and all were at very significant level, It showed that these model can be used for non-destructive monitoring of leaf chlorophyll content.

何丽香, 傅兆麟, 宫晶, 孙常玉. 基于光谱变化特征的小麦叶片不同功能期监测研究[J]. 激光生物学报, 2013, 22(6): 528. HE Lixiang, FU Zhaolin, GONG Jing, SUN Changyu. Study on Monitoring Different Functionally Period of Leaf Based on Variation of Spectral Characteristics in Wheat[J]. Acta Laser Biology Sinica, 2013, 22(6): 528.

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