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- Title
RELATIONSHIP BETWEEN VEGETATION INDICES AND AGRONOMIC PERFORMANCE OF MAIZE VARIETIES UNDER DIFFERENT NITROGEN RATES.
- Authors
da Silva FLORES, Marcela; PASCHOALETE, Willian Menitti; Rojo BAIO, Fabio Henrique; Silva CAMPOS, Cid Naudi; de Andréa PANTALEÃO, Ariane; Ribeiro TEODORO, Larissa Pereira; da SILVA JÚNIOR, Carlos Antônio; TEODORO, Paulo Eduardo
- Abstract
Precision agriculture is a set of techniques that assist the monitoring of the agronomic performance of the maize crop by using vegetation indices. This study aimed to verify the relationship between vegetation indices, plant height, leaf N content, and grain yield of three maize varieties, grown under high and low N as topdressing. The experiment was carried out at the Fundação de Apoio à Pesquisa Agropecuária de Chapadão (Fundação Chapadão), located in the municipality of Chapadão do Sul, during the 2017/2018 season. The experiment consisted of a randomized block design with four replications, arranged in a 3x2 split-plot scheme. The first factor (plots) corresponded to three open-pollinated maize varieties (BRS 4103, BRS Gorotuba, and SCS 154), and the second factor (subplots) consisted of two N rates applied as topdressing (80 and 160 kg- 1). All the evaluated variables showed varieties x N interaction. Vegetation indices in maize varieties were influenced by the N rate applied as topdressing. Normalized Difference Vegetation Index (NDVI) and Soil-adjusted Vegetation Index (SAVI) showed a higher correlation with plant height. At the same time, Normalized Difference Red Edge (NDRE) had a stronger association with leaf N content.
- Subjects
AGRONOMY; CORN varieties; EFFECT of nitrogen on plants; PRECISION farming; NORMALIZED difference vegetation index
- Publication
Bioscience Journal, 2020, Vol 36, Issue 5, p1638
- ISSN
1516-3725
- Publication type
Article
- DOI
10.14393/BJ-v36n5a2020-47993