Data/hora: 25/06/2024 13:53:08

Biblioteca(s): | Embrapa Arroz e Feijão; Embrapa Clima Temperado.
Data corrente: | 14/12/2023
Data da última atualização: | 14/12/2023
Autoria: | WANDER, A. E.; MATTOS, M. L. T.
Afiliação: | ALCIDO ELENOR WANDER, CNPAF; MARIA LAURA TURINO MATTOS, CPACT.
Título: | Economic evaluation of biological nitrogen fixation in flooded rice cultivation in subtropical lowlands.
Ano de publicação: | 2023
Fonte/Imprenta: | Journal of Agriculture and Rural Development in the Tropics and Subtropics, v. 124, n. 1, p. 57-63, 2023.
ISSN: | 2363-6033
DOI: | https://doi.org/10.17170/kobra-202306128202
Idioma: | Inglês
Conteúdo: | This study aimed to assess the economic viability of biological nitrogen fixation in flood rice cultivation in subtropical lowlands. A field experiment of seven treatments was carried out during the cropping seasons 2015/16, 2017/18, 2018/19 and 2019/20 at the Lowland Experimental Station of Embrapa, in Pelotas, RS, Brazil. The evaluated treatments were: (1) negative control (without N and inoculant); (2) positive control with recommended N-fertilisation (120 kg N ha−1, without inoculant) (standard recommendation); (3) inoculant 1 (accessions CMM 174 + CMM 175 + CMM 179); (4) inoculant 2 (accessions CMM 176 + CMM 197 + CMM 205); (5) combination of reduced N-fertiliser doses (90 kg N ha−1) + inoculant 1; (6) combination of reduced N-fertiliser doses (90 kg N ha−1) + inoculant 2; and (7) commercial inoculant [Azospirillum brasilense (strains Ab-V5 and Ab-V6)]. A partial budget was used to compare evaluated treatments with the standard recommendation regarding nitrogen fertilisation. Inoculant 2 composed of bacterial accessions CMM 176 (Rhizobium sp.), CMM 197 (Bacillus sp.) and CMM 205 (Aeromicrobium sp.) combined with reduced mineral nitrogen fertilisation [90 kg N ha−1 (applied in top dressing)] demonstrates the best agroeconomic efficiency in the production of irrigated rice in subtropical lowlands with the cultivar BRS Pampa.
Palavras-Chave: | Diazotrophic bacteria.
Thesagro: | Arroz; Fixação de Nitrogênio; Inoculante; Nitrogênio.
Thesaurus Nal: | Economic impact; Irrigated soils; Lowlands; Nitrogen; Nitrogen fixation; Subtropical soils.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1159752/1/Journal-agr-rural-development-tropics-subtropics-2023.pdf
Registro original: | Embrapa Arroz e Feijão (CNPAF)

Exemplares:

CNPAF - (36840-1) - UPC - AP - DD - 2023 -  - 2023 - DIS
CPACT - (22743-1) - UPC - AP - DD -  -  -  - DIS