Heterogeneity Analysis of Cucumber Canopy in the Solar Greenhouse
文献类型: 外文期刊
第一作者: Qian Ting-ting
作者: Qian Ting-ting;Zhao Chun-jiang;Lu Sheng-lian;Zhao Chun-jiang;Guo Xin-yu;Wen Wei-liang;Du Jian-jun
作者机构:
关键词: heterogeneity;inclination;leaf azimuth;light interception;photosynthesis
期刊名称:JOURNAL OF INTEGRATIVE AGRICULTURE ( 影响因子:2.848; 五年影响因子:2.979 )
ISSN: 2095-3119
年卷期: 2014 年 13 卷 12 期
页码:
收录情况: SCI
摘要: Detailed analysis of canopy structural heterogeneity is an essential step in conducting parameters for a canopy structural model. This paper aims to analyze the structural heterogeneity of a cucumber (Cucumis sativus L.) canopy by means of analyzing leaf distribution in a greenhouse environment with natural sunlight and also to assess the effect of structural canopy heterogeneity on light interception and photosynthesis. Two experiments and four measurements were carried out in autumn 2011 and spring 2012. A static virtual three-dimensional (3D) canopy structure was reconstructed using a 3D digitizing method. The diurnal variation of photosynthesis rate was measured using CIRAS-2 photosynthesis system. The results showed that, leaf azimuth as tested with the Rayleigh-test was homogeneous at vine tip over stage but turned heterogeneous at fruit harvest stage. After eliminating the influence of the environment on the azimuth using the von Mises-Fisher method, the angle between two successive leaves was 144 degrees; at the same time, a rule for the azimuth distribution in the canopy was established, stating that the azimuth distribution in cucumber followed a law which was positive spin and anti-spin. Leaf elevation angle of south-oriented leaves was on average 13.8 degrees higher than that of north-oriented leaves. The horizontal distribution of light interception and photosynthesis differed significantly between differently oriented leaves. East- and west-oriented leaves exhibited the highest photosynthetic rate. In conclusion, detailed analysis of canopy structural heterogeneity in this study indicated that leaf azimuth and elevation angle were heterogeneous in cucumber canopy and they should be explicitly described as they have a great impact both on light distribution and photosynthesis.
分类号:
- 相关文献
作者其他论文 更多>>
-
Estimation of Leaf and Canopy Scale Tea Polyphenol Content Based on Characteristic Spectral Parameters
作者:Duan Dan-dan;Liu Zhong-hua;Duan Dan-dan;Zhao Chun-jiang;Zhao Yu;Wang Fan;Zhao Chun-jiang;Zhao Yu;Wang Fan
关键词:Tea polyphenols; Hyperspectral data; Partial least squares; Random forest; Multiple linear regression
-
Research on the Classification of Yingde Tea Plantations Based on Time Series Sentinel-2 Images
作者:Chen Pan-pan;Ren Yan-min;Zhao Chun-jiang;Li Cun-jun;Liu Yu
关键词:Tea plantation; Sentinel-2; Temporal features; Machine learning; Classification
-
Estimation of Potato Above-Ground Biomass Based on VGC-AGB Model and Hyperspectral Remote Sensing
作者:Feng Hai-kuan;Zhao Chun-jiang;Feng Hai-kuan;Fan Yi-guang;Yang Gui-jun;Zhao Chun-jiang;Yue Ji-bo
关键词:VGC-AGB model; Hyperspectral remote sensing; Potato; Aboveground biomass (AGB)
-
Monitoring of Nitrogen Content in Winter Wheat Based on UAV Hyperspectral Imagery
作者:Feng Hai-kuan;Fan Yi-guang;Tao Hui-lin;Yang Gui-jun;Zhao Chun-jiang;Feng Hai-kuan;Zhao Chun-jiang;Yang Fu-qin
关键词:Unmanned aerial vehicle; Winter wheat; Hyperspectral; Nitrogen content; Stepwise regression; Spectral feature parameters
-
Detecting Green Plants Based on Fluorescence Spectroscopy
作者:Wang Ai-chen;Gao Bin-jie;Zhao Chun-jiang;Wang Miao-lin;Yan Shu-gang;Li Lin;Wei Xin-hua;Zhao Chun-jiang;Xu Yi-fei;Wang Ai-chen;Xu Yi-fei
关键词:Fluorescence spectroscopy; Green plant; Target detection; Precision agriculture; Site-specific spraying
-
Estimating total leaf nitrogen concentration in winter wheat by canopy hyperspectral data and nitrogen vertical distribution
作者:Duan Dan-dan;Zhao Yu;Yang Wu-de;Duan Dan-dan;Zhao Chun-jiang;Li Zhen-hai;Yang Gui-jun;Zhao Yu;Qiao Xiao-jun;Zhang Yun-he;Zhang Lai-xi;Duan Dan-dan;Zhao Chun-jiang;Li Zhen-hai;Yang Gui-jun;Zhao Yu;Qiao Xiao-jun;Zhang Yun-he;Zhang Lai-xi;Duan Dan-dan;Zhao Chun-jiang;Li Zhen-hai;Yang Gui-jun;Zhao Yu;Qiao Xiao-jun;Zhang Yun-he;Zhang Lai-xi
关键词:nitrogen concentration; hyperspectral; vertical nitrogen distribution; winter wheat
-
Discovery of leaf region and time point related modules and genes in maize (Zea mays L.) leaves by Weighted Gene Co-expression Network analysis (WGCNA) of gene expression profiles of carbon metabolism
作者:Wang Jing-lu;Zhang Ying;Pan Xiao-di;Du Jian-jun;Ma Li-ming;Guo Xin-yu
关键词:WGCNA; maize leaf; gene expression; gene modules; pathways