Comparison of Remote Sensing Estimation Models for Leaf Area Index of Rubber Plantation in Hainan Island

Leaf area index (LAI) is an important index to describe the growth status and canopy structure of vegetation, is of great theoretical and practical significance to quickly obtain LAI of large area vegetation and crops for ecosystem science research and agricultural & forestry production guidance...

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Autores principales:	DAI Shengpei, LUO Hongxia, ZHENG Qian, HU Yingying, LI Hailiang, LI Maofen, YU Xuan, CHEN Bangqian
Formato:	article
Lenguaje:	EN ZH
Publicado:	Editorial Office of Smart Agriculture 2021
Materias:	leaf area index (lai) rubber plantation remote sensing estimation model hainan island Agriculture (General) S1-972 Technology (General) T1-995
Acceso en línea:	https://doaj.org/article/d63fc6aa0ac445d9809a311f58402d63
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spelling	oai:doaj.org-article:d63fc6aa0ac445d9809a311f58402d632021-11-17T07:52:11ZComparison of Remote Sensing Estimation Models for Leaf Area Index of Rubber Plantation in Hainan Island2096-809410.12133/j.smartag.2021.3.2.202106-SA003https://doaj.org/article/d63fc6aa0ac445d9809a311f58402d632021-06-01T00:00:00Zhttp://www.smartag.net.cn/article/2021/2096-8094/2096-8094-2021-3-2-45.shtmlhttps://doaj.org/toc/2096-8094Leaf area index (LAI) is an important index to describe the growth status and canopy structure of vegetation, is of great theoretical and practical significance to quickly obtain LAI of large area vegetation and crops for ecosystem science research and agricultural & forestry production guidance. In this study, the typical tropical crop rubber tree in Hainan Island was selected as the research area, the LAI estimation model of rubber plantation based on satellite remote sensing vegetation indices was constructed, and its spatiotemporal variation was analyzed. The results showed that, compared with correlations between LAI and the indices of normalized difference vegetation index (NDVI), green NDVI (GNDVI), ratio vegetation index (RVI) and wide dynamic range vegetation index (WDRVI), correlations were higher between LAI and the indices of enhanced vegetation index (EVI), soil adjusted vegetation index (SAVI), difference vegetation index (DVI) and modified soil adjusted vegetation index (MSAVI). Among the LAI estimation models based on different vegetation indices (linear, exponential and logarithmic models), the linear estimation model based on EVI index was the best, and its coefficient of determination (R2) was 0.69. The accuracy of LAI estimation model was high. The linear fitting R2 of observed and simulated LAI was 0.67, the root mean square error (RMSE) was 0.16, and the average relative error (RE) was -0.25%. However, there was underestimation in the middle value and overestimation in the high and low value area of LAI. The high LAI values (4.40－6.23) were mainly distributed in Danzhou and Baisha in the west of Hainan Island, the middle LAI values (3.80－4.40) were mainly distributed in Chengmai, Tunchang and Qiongzhong in the middle of Hainan Island, and the low LAI values (2.69－3.80) were mainly distributed in Ding'an, Qionghai, Wanning, Ledong and Sanya in the east and south of Hainan Island. In summary, the linear estimation model for rubber plantation LAI based on EVI index obtained high accuracy, and has good values of popularization and appliance.DAI ShengpeiLUO HongxiaZHENG QianHU YingyingLI HailiangLI MaofenYU XuanCHEN BangqianEditorial Office of Smart Agriculturearticleleaf area index (lai)rubber plantationremote sensingestimation modelhainan islandAgriculture (General)S1-972Technology (General)T1-995ENZH智慧农业, Vol 3, Iss 2, Pp 45-54 (2021)
institution	DOAJ
collection	DOAJ
language	EN ZH
topic	leaf area index (lai) rubber plantation remote sensing estimation model hainan island Agriculture (General) S1-972 Technology (General) T1-995
spellingShingle	leaf area index (lai) rubber plantation remote sensing estimation model hainan island Agriculture (General) S1-972 Technology (General) T1-995 DAI Shengpei LUO Hongxia ZHENG Qian HU Yingying LI Hailiang LI Maofen YU Xuan CHEN Bangqian Comparison of Remote Sensing Estimation Models for Leaf Area Index of Rubber Plantation in Hainan Island
description	Leaf area index (LAI) is an important index to describe the growth status and canopy structure of vegetation, is of great theoretical and practical significance to quickly obtain LAI of large area vegetation and crops for ecosystem science research and agricultural & forestry production guidance. In this study, the typical tropical crop rubber tree in Hainan Island was selected as the research area, the LAI estimation model of rubber plantation based on satellite remote sensing vegetation indices was constructed, and its spatiotemporal variation was analyzed. The results showed that, compared with correlations between LAI and the indices of normalized difference vegetation index (NDVI), green NDVI (GNDVI), ratio vegetation index (RVI) and wide dynamic range vegetation index (WDRVI), correlations were higher between LAI and the indices of enhanced vegetation index (EVI), soil adjusted vegetation index (SAVI), difference vegetation index (DVI) and modified soil adjusted vegetation index (MSAVI). Among the LAI estimation models based on different vegetation indices (linear, exponential and logarithmic models), the linear estimation model based on EVI index was the best, and its coefficient of determination (R2) was 0.69. The accuracy of LAI estimation model was high. The linear fitting R2 of observed and simulated LAI was 0.67, the root mean square error (RMSE) was 0.16, and the average relative error (RE) was -0.25%. However, there was underestimation in the middle value and overestimation in the high and low value area of LAI. The high LAI values (4.40－6.23) were mainly distributed in Danzhou and Baisha in the west of Hainan Island, the middle LAI values (3.80－4.40) were mainly distributed in Chengmai, Tunchang and Qiongzhong in the middle of Hainan Island, and the low LAI values (2.69－3.80) were mainly distributed in Ding'an, Qionghai, Wanning, Ledong and Sanya in the east and south of Hainan Island. In summary, the linear estimation model for rubber plantation LAI based on EVI index obtained high accuracy, and has good values of popularization and appliance.
format	article
author	DAI Shengpei LUO Hongxia ZHENG Qian HU Yingying LI Hailiang LI Maofen YU Xuan CHEN Bangqian
author_facet	DAI Shengpei LUO Hongxia ZHENG Qian HU Yingying LI Hailiang LI Maofen YU Xuan CHEN Bangqian
author_sort	DAI Shengpei
title	Comparison of Remote Sensing Estimation Models for Leaf Area Index of Rubber Plantation in Hainan Island
title_short	Comparison of Remote Sensing Estimation Models for Leaf Area Index of Rubber Plantation in Hainan Island
title_full	Comparison of Remote Sensing Estimation Models for Leaf Area Index of Rubber Plantation in Hainan Island
title_fullStr	Comparison of Remote Sensing Estimation Models for Leaf Area Index of Rubber Plantation in Hainan Island
title_full_unstemmed	Comparison of Remote Sensing Estimation Models for Leaf Area Index of Rubber Plantation in Hainan Island
title_sort	comparison of remote sensing estimation models for leaf area index of rubber plantation in hainan island
publisher	Editorial Office of Smart Agriculture
publishDate	2021
url	https://doaj.org/article/d63fc6aa0ac445d9809a311f58402d63
work_keys_str_mv	AT daishengpei comparisonofremotesensingestimationmodelsforleafareaindexofrubberplantationinhainanisland AT luohongxia comparisonofremotesensingestimationmodelsforleafareaindexofrubberplantationinhainanisland AT zhengqian comparisonofremotesensingestimationmodelsforleafareaindexofrubberplantationinhainanisland AT huyingying comparisonofremotesensingestimationmodelsforleafareaindexofrubberplantationinhainanisland AT lihailiang comparisonofremotesensingestimationmodelsforleafareaindexofrubberplantationinhainanisland AT limaofen comparisonofremotesensingestimationmodelsforleafareaindexofrubberplantationinhainanisland AT yuxuan comparisonofremotesensingestimationmodelsforleafareaindexofrubberplantationinhainanisland AT chenbangqian comparisonofremotesensingestimationmodelsforleafareaindexofrubberplantationinhainanisland
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Comparison of Remote Sensing Estimation Models for Leaf Area Index of Rubber Plantation in Hainan Island

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