Data/hora: 07/06/2024 15:06:48

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 14/05/2020
Data da última atualização: | 14/05/2020
Autoria: | AGUIRRE, P. F.; GIACOMINI, S. J.; OLIVO, C. J.; BRATZ, V. F.; QUATRIN, M. P.; SCHAEFER, G. L.
Afiliação: | Priscila Flôres Aguirre, Universidade Federal de Santa Maria - UFSM/Departamento de Zootecnia; Sandro José Giacomini, Universidade Federal de Santa Maria - UFSM/Departamento de Solos; Clair Jorge Olivo, Universidade Federal de Santa Maria - UFSM/Departamento de Zootecnia; Vinicius Felipe Bratz, Universidade Federal de Santa Maria - UFSM/Departamento de Zootecnia; Maurício Pase Quatrin, Universidade Federal de Santa Maria - UFSM/Departamento de Zootecnia; Gilmar Luiz Schaefer, Universidade Federal de Santa Maria - UFSM/Departamento de Solos.
Título: | Biological nitrogen fixation and urea-N recovery in 'Coastcross-1' pasture treated with Azospirillum brasilense.
Ano de publicação: | 2020
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, v. 55, e01242, 2020.
Idioma: | Inglês
Notas: | Título em português: Fixação biológica de nitrogênio e recuperação de N-ureia em pastagem de 'Coastcross-1' tratada com Azospirillum brasilense.
Conteúdo: | The objective of this work was to quantify the inoculation effect of Azospirillum brasilense (Ab-V5 and Ab-V6 strains) on the forage yield, biological nitrogen fixation (BNF), and urea-15N recovery of the forage grass 'Coastcross-1'. The experiment was carried out in a 2 (with or without inoculation) × 2 (without N fertilizer and with 100 kg ha-1 N per year as urea) × 7 (cuts) factorial arrangement. The natural 15N abundance method was used to determine BNF; to determine urea-N recovery, 15N-labeled urea was applied in microplots. Forage yield was higher in grasses subjected to inoculation, with 7.4 Mg ha-1 dry matter per year, for the treatment without N fertilizer, and 8.0 Mg ha-1 dry matter per year for the treatment with 100 kg ha-1 N per year, respectively, which shows an additive effect of inoculation and N fertilization. The contribution of BNF was 23.0 and 53.8 kg ha-1 per year for the unfertilized treatment, both in uninoculated and inoculated plants, respectively. Urea-15N recovery was 13.7 and 16.5 kg ha-1 per year for uninoculated and inoculated treatments, respectively, corresponding to 13.7 and 16.5% of the urea-N applied. Inoculation with A. brasilense increases forage yield and the contribution of BNF to grass nutrition with N, as well as urea-N recovery by the forage grass.
Palavras-Chave: | Abundância natural de 15N; Natural abundance of 15N; Produção de forragem.
Thesagro: | Cynodon Dactylon.
Thesaurus Nal: | Forage yield.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/213018/1/Biological-nitrogen-fixation-and-urea-N.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (64779-1) - UPE - AP - DD -  -  -  - DIS