Economic evaluation of biological nitrogen fixation in flooded rice cultivation in subtropical lowlands

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dc.date.accessioned2023-06-14T13:48:14Z
dc.date.available2023-06-14T13:48:14Z
dc.date.issued2023-06-13
dc.identifierdoi:10.17170/kobra-202306128202
dc.identifier.urihttp://hdl.handle.net/123456789/14822
dc.language.isoengeng
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectpartial budgeteng
dc.subjectnitrogeneng
dc.subjectdiazotrophic bacteriaeng
dc.subjectinoculanteng
dc.subjectirrigated riceeng
dc.subject.ddc630e
dc.subject.swdBrasilienger
dc.subject.swdSubtropenger
dc.subject.swdTieflandger
dc.subject.swdReisanbauger
dc.subject.swdBewässerungger
dc.subject.swdStickstofffixierungger
dc.subject.swdImpfung <Chemie>ger
dc.subject.swdBakterienger
dc.titleEconomic evaluation of biological nitrogen fixation in flooded rice cultivation in subtropical lowlandseng
dc.typeAufsatz
dc.type.versionpublishedVersion
dcterms.abstractThis 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.eng
dcterms.accessRightsopen access
dcterms.creatorWander, Alcido Elenor
dcterms.creatorMattos, Maria Laura Turino
dcterms.source.identifiereissn:2363-6033
dcterms.source.issueNo. 1
dcterms.source.journalJournal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS)eng
dcterms.source.pageinfo57-63
dcterms.source.volumeVol. 124
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Vol 124, No 1 (2023)