Datum
2023-06-13Schlagwort
630 Landwirtschaft, Veterinärmedizin BrasilienSubtropenTieflandReisanbauBewässerungStickstofffixierungImpfung <Chemie>BakterienMetadata
Zur Langanzeige
Aufsatz
Economic evaluation of biological nitrogen fixation in flooded rice cultivation in subtropical lowlands
Zusammenfassung
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-fertilization (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-fertilizer doses (90 kg N ha-¹) + inoculant 1; (6) combination of reduced N-fertilizer 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.
Zitierform
In: Journal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS) Vol. 124 / No. 1 (2023-06-13) , S. 57-63 ; eissn:2363-6033Sammlung(en)
Vol 124, No 1 (2023) (Journal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS))Zitieren
@article{doi:10.17170/kobra-202306128202,
author={Wander, Alcido Elenor and Mattos, Maria Laura Turino},
title={Economic evaluation of biological nitrogen fixation in flooded rice cultivation in subtropical lowlands},
journal={Journal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS)},
year={2023}
}
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2023-06-14T13:48:14Z 2023-06-14T13:48:14Z 2023-06-13 doi:10.17170/kobra-202306128202 http://hdl.handle.net/123456789/14822 eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ partial budget nitrogen diazotrophic bacteria inoculant irrigated rice 630 Economic evaluation of biological nitrogen fixation in flooded rice cultivation in subtropical lowlands Aufsatz 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-fertilization (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-fertilizer doses (90 kg N ha-¹) + inoculant 1; (6) combination of reduced N-fertilizer 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. open access Wander, Alcido Elenor Mattos, Maria Laura Turino Brasilien Subtropen Tiefland Reisanbau Bewässerung Stickstofffixierung Impfung <Chemie> Bakterien publishedVersion eissn:2363-6033 No. 1 Journal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS) 57-63 Vol. 124 false
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