Data/hora: 10/06/2024 14:02:31

Biblioteca(s): | Embrapa Arroz e Feijão.
Data corrente: | 01/10/2021
Data da última atualização: | 27/09/2023
Autoria: | SANTOS, M. P. dos; HEINEMANN, A. B.; STONE, L. F.; MATTA, D. H. da; CASTRO, J. R. de; SANTOS, A. B. dos.
Afiliação: | MARCOS PAULO DOS SANTOS, UFG; ALEXANDRE BRYAN HEINEMANN, CNPAF; LUIS FERNANDO STONE, CNPAF; DAVID HENRIQUES DA MATTA, UFG; JOÃO RODRIGO DE CASTRO, UFG; ALBERTO BAETA DOS SANTOS, CNPAF.
Título: | Nitrogen determination in irrigated rice using spectral reflectance.
Ano de publicação: | 2021
Fonte/Imprenta: | Agronomy Journal, v. 113, n. 6, p. 5087-5101, Nov./Dec. 2021.
ISSN: | 1435-0645
DOI: | https://doi.org/10.1002/agj2.20892
Idioma: | Inglês
Conteúdo: | Precision N management using optical radiation sensors is a promising management strategy. Using a combination of three spectral reflectance bands, 22 vegetation indices (VI) were calculated and evaluated for their efficiency in estimating N status in irrigated rice during growth stages. The results obtained here have showed a promising strategy to include crop stages as covariate in generalist models to predict the N status parameters for irrigated rice. This approach is interesting because it reduces the need for specific models, with different structures, for each crop stage. In addition, including crop stages as a covariate in the prediction models allows knowing the rice N status according to the crop stage, which is essential for efficient nitrogen management in commercial crops. The results obtained here show the beginning of vegetative stage (V1 to V9) significantly affects the prediction of all N status parameters. The dry leaf biomass (DLB), leaf area index (LAI), leaf N uptake (LNU) and N nutrition index (NNI) can be adequately predicted with combinations of just two vegetative indices (VI). These results show the importance of using active sensors with more than two fixed bands, preferably including a red-edge band, for effective crop N status estimation.
Thesagro: | Arroz Irrigado; Nitrogênio; Oryza Sativa; Sensoriamento Remoto.
Thesaurus Nal: | Ecophysiology; Nitrogen; Reflectance; Remote sensing; Rice.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (36160-1) - UPC - AP - DD - 2021 -  - 2021 - DIS