Study on the Polarized Reflectance Characteristics of Single Greenhouse Tomato Nutrient Deficiency Leaves
ZHU Wen-jing1,2, MAO Han-ping1,2*, LIU Hong-yu1,2, ZHANG Xiao-dong1,2, NI Ji-heng1,2
1. Institute of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China 2. Key Laboratory of Modern Agricultural Equipment and Technology，Ministry of Education & Jiangsu Province，Jiangsu University，Zhenjiang 212013，China
Abstract：In order to improve accuracy of quantitative analysis model for the greenhouse tomato nitrogen, phosphorus and potassium nutrient stress, and explore the advantages of polarization non-destructive detection in single-leaf plants scale, polarized reflectance characteristics of greenhouse nutrient deficiency tomato leaves in different growing seasons and different deficiency extents were both examined via means of polarized reflectance spectroscopy system, which was self-developed by the research group. The main factors with effects on the polarized reflectance characteristics of tomato leaves were discussed, such as incident zenith angle, azimuth angle, detection zenith angle, light source polarizer degree, and detector polarizer degree. Experiments were carried out to verify the optimum level of above five parameters by means of range analysis of orthogonal experiments, through that way we can know the best angle combination of five parameters. Based on the above analysis, the angle combination and sorting of detecting tomato nutrients deficiency leaves via means of polarization spectroscopy system were obtained as follows: incident zenith angle 60°, light source polarizer degree 0°, detection zenith angle 45°, detector polarizer degree 45° and azimuth angle 180°. At the same time, both the spectra of nitrogen, phosphorus and potassium deficiency leaves in different growth stages and different deficiency extent leaves were compared with each other. Results show that there is a positive correlation between the greenhouse nutrient deficiency tomato leaves growth cycle and tomato leaves polarized reflectance spectra. Nutrient excess or nutrient deficiency can both lead to polarized reflectance decline and polarized reflectance decline extent of greenhouse tomato leaves is more obvious during the fruiting and harvest period. This paper has a certain theoretical and practical significance in the research on nutrition rapid detection on the plant single leaf scale by means of polarized reflectance spectrum.
朱文静1,2，毛罕平1,2*，刘红玉1,2，张晓东1,2，倪纪恒1,2 . 温室番茄缺素叶片偏振反射特征分析 [J]. 光谱学与光谱分析, 2014, 34(01): 145-150.
ZHU Wen-jing1,2, MAO Han-ping1,2*, LIU Hong-yu1,2, ZHANG Xiao-dong1,2, NI Ji-heng1,2 . Study on the Polarized Reflectance Characteristics of Single Greenhouse Tomato Nutrient Deficiency Leaves . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(01): 145-150.
[1] Song Kaishan, Zhang Bai，Zhao Yunsheng, et al. Journal of Remote Sensing, 2007, 11(5)：632. [2] Francois-Marie Breon, Didier Tanre, Pierre Lecomte，et al. IEEE Transactions on Geoscience and Remote Sensing, 1995, 33(2): 487. [3] Comar A, Baret F，Viénot F, et al. Remote Sensing of Environment，2012，121：26. [4] Raven P N, Jordan D. Opt. Eng., 2002, 4(15): 1002. [5] Vanderbilt V, Grant L. Proc.，2005, 73(6): 1012. [6] HAN Zhi-gang, Lü Da-ren, LIU Chun-tian, et al(韩志刚，吕达仁，刘春田，等). Acta Agrestia Sinica(草地学报)，1998，6(4)：237. [7] YANG Zhi-wen, GAO Sheng-gang, WANG Pei-gang(杨之文，高胜钢，王培纲). Acta Optica Sinica(光学学报)，2005，25(2)：241. [8] SONG Kai-shan, ZHAO Yun-sheng, JIN Lun(宋开山，赵云升，金 伦). Journal of Northeast Normal University·Natural Science(东北师大学报·自然科学版), 2000，32(4)：112. [9] ZHAO Yun-sheng(赵云升). Journal of Remote Sensing(遥感学报), 2000, 4(2): 131. [10] HAN Yang, LI Qian, ZHAO Yun-sheng, et al(韩 阳，李 潜，赵云升，等). Journal of Infrared and Millimeter Waves(红外与毫米波学报)，2010, 29(4)：316. [11] ZHANG Cheng-jun(张成军). Experimental Design and Data Processing(实验设计与数据处理). Beijing: Chemical Industry Press(北京: 化学工业出版社), 2009. [12] PAN Rui-zhi(潘瑞炽). Plant Physiology(植物生理学). Beijing: Higher Education Press(北京: 高等教育出版社), 2012. [13] Lois Grant. Remote Sensing of Environment, 1987, 22(2)：309. [14] Read J, Tarpley L, Mckinion J M, et al. Journal of Environmental Quality，2002, 31(5): 1442.
