Relationship between gross primary production and canopy colour indices from digital camera images in a rubber (Hevea brasiliensis) plantation, Southwest China
Relationship between gross primary production and canopy colour indices from digital camera images in a rubber (Hevea brasiliensis) plantation, Southwest China
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中国西南橡胶园数码相机图像的总初级生产力与冠层颜色指数的关系
DOI：
10.1016/j.foreco.2019.01.019
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发表时间：
2019-04
影响因子：
3.7
通讯作者：
Wang Shusen
中科院分区：
文献类型：
--
作者：
Zhou Ruiwu;Zhang Yiping;Song Qinghai;Lin Youxing;Sha Liqing;Jin Yanqiang;Liu Yuntong;Fei Xuehai;Gao Jinbo;He Yunling;Li Tongyan;Wang Shusen
安装在通量塔上的数码相机数量的广泛增加为更好地了解冠层光合作用的季节性与冠层物候之间的关系提供了机会。挑战是由于橡胶冠层的橡胶落叶变化较少。我们研究了根据数码相机图像计算出的颜色指数与从橡胶种植园两年内每日通量塔观测二氧化碳获得的总初级生产力 (GPP) 之间的关系，并使用这些颜色指数来模拟 GPP。结果表明：（1）橡胶园的绿色强度（Sgreen）、色调和GPP表现出明显的季节特征，并且基于相机的指数与GPP之间的关系在不同物候阶段表现出明显的特征； (2) 通量塔测量的峰值 GPP 滞后于根据数码相机图像计算的颜色指数的峰值； (3) GPP与橡胶园相机图像得到的Sgreen密切相关，特别是在展叶期； (4)颜色指数(Sgreen和Hue)模拟的GPP被低估，吸收光合有效辐射分数(FPAR)是正常年份模拟GPP的最佳参数。我们的结果表明，根据数码相机图像计算的颜色指数可用于模拟橡胶种植园的 GPP 并监测生物和非生物胁迫事件。未来的研究应该测量冠层叶子的色素含量，以精确量化颜色指数和 GPP 之间的关系。
The widespread increase in the number of digital cameras mounted on flux towers provides an opportunity to better understand the relationship between the seasonality of canopy photosynthesis and canopy phenology. The challenge is due to fewer variations in rubber defoliation of rubber canopy. We examined the relationship between colour indices calculated from digital camera images and gross primary production (GPP) obtained from daily flux tower observations of carbon dioxide over two years in a rubber plantation and used these colour indices to model GPP. According to the results, (1) the strength of green (Sgreen), Hue and GPP exhibited clear seasonal patterns in the rubber plantation, and the relationship between the camera-based indices and GPP appeared to have distinct characteristics at different phenological stages; (2) the peak GPP from the flux tower measurements lagged behind the peak in the colour indices calculated from digital camera imagery; (3) GPP was strongly correlated with Sgreenderived from camera imagery in the rubber plantation, especially in the leaf expansion period; and (4) the GPP simulated by colour indices (Sgreenand Hue) was underestimated, and the fraction of absorbed photosynthetically active radiation (FPAR) was the best parameter for modelling GPP in normal years. Our results indicate that colour indices calculated from digital camera images can be used to model GPP in rubber plantations and to monitor biotic and abiotic stress events. Future research should measure the pigment contents of canopy leaves to precisely quantify the relationship between colour indices and GPP.
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DOI：
10.1007/978-94-011-5446-8_11
发表时间：
1997
期刊：
--
影响因子：
--
作者：
J. Landsberg;S. Prince;P. Jarvis;R. McMurtrie;R. Luxmoore;B. Medlyn
通讯作者：
J. Landsberg;S. Prince;P. Jarvis;R. McMurtrie;R. Luxmoore;B. Medlyn
DOI：
10.3846/enviro.2014.059
发表时间：
2014
期刊：
--
影响因子：
--
作者：
G. Sujetovienė;Irma Šveikauskaitė
通讯作者：
G. Sujetovienė;Irma Šveikauskaitė
影响因子：
5.2
作者：
Toshie Mizunuma;M. Wilkinson;E. L. Eaton;Maurizio Mencuccini;J. Morison;J. Grace
通讯作者：
Toshie Mizunuma;M. Wilkinson;E. L. Eaton;Maurizio Mencuccini;J. Morison;J. Grace
中国热带地区的橡胶种植园充当水泵
影响因子：
5.2
作者：
Liang Nai-Shen;Zhang Yi-Ping;Song Qing-Hai;Liu Wen-Jie;Deng Xiao-Bao;Tang Jian-Wei;Deng Yun;Zhou Wen-Jun;Yang Lian-Yan
通讯作者：
Yang Lian-Yan
影响因子：
6.9
作者：
Jian Wang;Chaoyang Wu;Chunhua Zhang;W. Ju;Xiaoyue Wang;Zhi Chen;B. Fang
通讯作者：
Jian Wang;Chaoyang Wu;Chunhua Zhang;W. Ju;Xiaoyue Wang;Zhi Chen;B. Fang