《植物生理学报》 2014, 50(3): 358-363

水肥耦合下夏玉米不同生育时期的高光谱特性与反演模型研究

王飞, 宋希云, 刘树堂*, 宋祥云

青岛农业大学资源与环境学院, 山东青岛266109

通信作者：刘树堂；E-mail: liushutang212@163.com；Tel: 13791256958

摘　要：

本文通过整个光谱范围内一阶导数光谱反射率与叶绿素、可溶性糖和可溶性蛋白的相关系数显著的波段, 建立高光谱预监测水肥耦合条件下的夏玉米光合特性以及碳氮代谢, 进而为玉米高产提供依据。在玉米拔节期和大喇叭口期选择596、1 025和924 nm, 吐丝期和乳熟期选择638、1 068和965 nm这几个显著性波段的实测值来建立估测模型。研究结果表明, 拔节和大喇叭口期叶片叶绿素SPAD值的估测模型为y=28832.45ρ596+39.34, 可溶性糖含量的估测模型为y=640.54ρ1025+7.92, 可溶性蛋白含量一阶导数光谱估测模型为y=4092.90ρ924+5.63, 而吐丝期和乳熟期叶片叶绿素SPAD值的估测模型为y=134151.00ρ638+129.92, 可溶性糖含量的估测模型为y=524.80ρ1068+9.20, 可溶性蛋白含量一阶导数光谱估测模型为y=7321.61ρ965+36.64。所建立的高光谱预测模型在本试验所属的时空范围内能很好地预测和反演玉米生长状况。

关键词：夏玉米; 高光谱特性; 水肥耦合

收稿：2013-07-31   修定：2014-01-04

资助：山东省现代农业产业技术体系创新创新团队(玉米)项目、“十二五”国家科技支撑计划(2011BAD10B09-03、2012BAD04B05-03和2013BAD07B06-03)和山东省泰山学者岗位(旱作作物与育种学)。

Hyper-Spectral Characteristic and Modeling of Carbon and Nitrogen Metabolism from Summer Maize Leaves at Different Growth Stages under the Couple of Water and Fertilizer

WANG Fei, SONG Xi-Yun, LIU Shu-Tang*, SONG Xiang-Yun

Resource and Environmental College, Qingdao Agriculture University, Qingdao, Shandong 266109, China

Corresponding author: LIU Shu-Tang; E-mail: liushutang212@163.com; Tel: 13791256958

Abstract:

Based on the couple of water and fertilizer of summer maize, this paper established the hyperspectral in order to monitor photosynthetic characteristics and carbon and nitrogen metabolism. Comparing the correlation wave band of the first derivative reflectance and SPAD, sugar content, proten content, it chose 596, 1 025 and 924 nm in the maize jointing stage and big trumpet period. Yet it chose 638, 1 068 and 965 nm in the silking stage and milk period. The results showed that, in the mazie jointing stage and big trumpet period, estimation model were ySPAD=28832.45ρ596+39.34, ysugar=640.54ρ1025+7.92, yproten=092.90ρ924+5.63. In the silking stage and milk period, estimation model were ySPAD=134151.00ρ638+129.92, ysugar=524.80ρ1068+9.2, yproten=7321.61ρ965+36.64. So the estimation model could predict growth status of maize in space-time range belongs to the exercise correctly.

Key words: summer maize (Zea mays); hyper-spectral characteristic; couple of water and fertilizer