Estimating Pasture Biomass and Canopy Height in Brazilian Savanna Using UAV Photogrammetry

被引:47
作者
Batistoti, Juliana [1 ]
Marcato Junior, Jose [2 ]
Itavo, Luis [1 ]
Matsubara, Edson [3 ]
Gomes, Eva [1 ]
Oliveira, Bianca [2 ]
Souza, Mauricio [2 ]
Siqueira, Henrique [2 ]
Salgado Filho, Geison [2 ]
Akiyama, Thales [2 ]
Goncalves, Wesley [2 ,3 ]
Liesenberg, Veraldo [4 ]
Li, Jonathan [5 ,6 ]
Dias, Alexandre [1 ]
机构
[1] Univ Fed Mato Grosso do Sul, Fac Vet Med & Anim Sci, Ave Senador Filinto Muller 2443, BR-79074960 Campo Grande, MS, Brazil
[2] Univ Fed Mato Grosso do Sul, Fac Engn Architecture & Urbanism & Geog, Av Costa & Silva S-N, BR-79070900 Campo Grande, MS, Brazil
[3] Univ Fed Mato Grosso do Sul, Fac Comp Sci, Av Costa & Silva S-N, BR-79070900 Campo Grande, MS, Brazil
[4] Santa Catarina State Univ UDESC, Dept Forest Engn, BR-88520000 Lages, SC, Brazil
[5] Univ Waterloo, Dept Geog & Environm Management, Waterloo, ON N2L 3G1, Canada
[6] Univ Waterloo, Dept Syst Design Engn, Waterloo, ON N2L 3G1, Canada
关键词
Panicum maximum; digital surface model; digital elevation model; crop surface models; herbage mass; forage canopy height; CROP SURFACE MODELS; UNMANNED AERIAL VEHICLE; PLANT HEIGHT; TRAITS; SYSTEMS; IMAGES; YIELD;
D O I
10.3390/rs11202447
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The Brazilian territory contains approximately 160 million hectares of pastures, and it is necessary to develop techniques to automate their management and increase their production. This technical note has two objectives: First, to estimate the canopy height using unmanned aerial vehicle (UAV) photogrammetry; second, to propose an equation for the estimation of biomass of Brazilian savanna (Cerrado) pastures based on UAV canopy height. Four experimental units of Panicum maximum cv. BRS Tamani were evaluated. Herbage mass sampling, height measurements, and UAV image collection were simultaneously performed. The UAVs were flown at a height of 50 m, and images were generated with a mean ground sample distance (GSD) of approximately 1.55 cm. The forage canopy height estimated by UAVs was calculated as the difference between the digital surface model (DSM) and the digital terrain model (DTM). The R-2 between ruler height and UAV height was 0.80; between biomass (kg ha(-1) GB-green biomass) and ruler height, 0.81; and between biomass (kg ha(-1) GB) and UAV height, 0.74. UAV photogrammetry proved to be a potential technique to estimate height and biomass in Brazilian Panicum maximum cv. BRS Tamani pastures located in the endangered Brazilian savanna (Cerrado) biome.
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页数:12
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