Phosphorus use efficiency of soybean cultivars in cerrado conditions of Tocantins, Brazil

Colombo, Gustavo André; Pelúzio, Joênes Mucci; Pires, Luíz Paulo Miranda; Daronch, Douglas José; Filho, Gilberto Coutinho Machado

doi:10.18067/jbfs.v3i1.53

Cited by 2 publications

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“…Variables production and productivity were not evaluated in this project, considering that there was no grain harvest; however, data on the number of pods were obtained, where BRS 333 RR cultivar obtained the highest average with 1182.75 pods, under conditions of 60 kg h -1 , and even results were not statistically significant, cultivar under dose of 120 kg ha -1 produced average number of pods of 947.50 (Figure 4), which reinforces the results of other works such as the Zucareli et al (2011) and Silva et al (2015), who reported the same economic efficiency with dose 120 kg h -1 , in quadratic response for the yield of 'Carioca' beans and soybean respectively, and in soils with low phosphorus availability. Colombo et al, (2016) presented average of 69 pods per soybean plant in high P 2 O 5 environment with 120 kg ha -1 , which represented an increase of 56.8% in relation to plants under conditions of low P 2 O 5 (40 kg ha -1 ) with 44 pods per plant. Fertilizer doses considered economical correspond to more than 80% of the dose responsible for maximum production, which may represent the economic viability of the use of phosphate fertilizer in soybean cultivation.…”

Section: Resultsmentioning

confidence: 90%

Phosphate Fertilization Efficiency in Soybean Cultivars Indicated for Cerrado Tropical Soil Regions

et al. 2019

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Phosphorus deficiency (P2O5) is among the main abiotic stresses that limit soybean production in cerrado soils. Its low availability in soils, especially in the more weathered and acidic ones, the increased demand and its scarcity estimations leadto the need for the development of cultivars more efficient in the use of this mineral. This experiment was conducted under field conditions in the municipality of Imperatriz, state of Maranhão, Brazil, under planosol conditions, in a randomized complete block design, with treatments arranged in a 2x4 factorial scheme with four replicates, four P levels (0, 60, 120 and 180 kg ha-1), and two soy bean cultivars (BRS 333 RR and BRS 9180 IPRO) indicated for tropical regions or Brazilian cerrado. In this study, P2O5 efficiency use was evaluated based on plant height, shoot dry mass (SDM), pod dry mass (PDM) and number of pods (NP). BRS 333 RR cultivar obtained the highest efficiency with doses of 84.35 kg ha-1 and 94.46 kg.ha-1, producing 696,76.76g e 86,72.06g for SDM and PDM respectively, average height of94.15 cm with 123.98 kh.ha-1 and phosphate fertilizer use efficiency (FUE) of 13%

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Section: Resultsmentioning

confidence: 90%

Phosphate Fertilization Efficiency in Soybean Cultivars Indicated for Cerrado Tropical Soil Regions

et al. 2019

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“…Os autores identificaram efeito significativo entre cultivares, atribuindo caráter genético à variabilidade da população. Em avaliações similares, Colombo et al (2016) observaram maior responsividade ao uso do fósforo na cultivar M-9350. De acordo com os autores, o genótipo possivelmente reúne algum mecanismo fisiológico favorável à utilização e incorporação do nutriente.…”

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Capacidade combinatória de genótipos de soja sob condições de cerrado de baixa latitude

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Daronch

et al. 2018

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PALAVRAS-CHAVE Glycine maxMelhoramento genético Tocantins Dialelo completo KEYWORDS Glycine max Genetic improvement Tocantins Complete diallel RESUMO: A seleção de genitores para cruzamentos é uma das etapas mais importantes em programas de melhoramento, em que a predição do potencial genético das combinações híbridas permite ao melhorista canalizar recursos humanos e financeiros em populações superiores. Nesse sentido, este trabalho buscou estimar as capacidades geral (CGC) e específica de combinação (CEC) de sete genótipos de soja em duas gerações (F1 e F2) a fim de indicar genitores e combinações híbridas promissoras. Os híbridos F1, as populações F2 e os genitores foram avaliados em Gurupi, Tocantins, sendo a geração F1 e seus respectivos genitores avaliados em casa de vegetação, e a geração F2, em campo. Os atributos mensurados foram: número de dias para florescimento e maturação, número de grãos por vagens, número de vagens por planta, massa de cem grãos e produtividade de grãos por planta. Para todos os atributos foi detectado efeito significativo para CEC nas duas gerações, e os resultados da análise dialélica foram concordantes nas gerações F1 e F2. Os genitores M-8360 e A-7002 reúnem alelos favoráveis à diminuição do número de dias para florescimento e para maturação em soja. A hibridação M-8360 × BRS Valiosa é promissora à obtenção de linhagens de soja com ciclo precoce. Os genitores M-8360 e M-8867 são promissores como genitores em programas de melhoramento populacional voltados a incrementos nos componentes de produção, bem como a hibridação entre eles para obter populações segregantes superiores. ABSTRACT:The parent selection for crossings is one of the most important steps in genetic improvement programs, in which the prediction of the genetic potential of hybrids allows the breeder to channel human and financial resources at higher populations. In this sense, the objective of this study was to estimate the general (GCA) and specific combining ability (SCA) of seven soybean genotypes, in two generations (F1 and F2), to indicate parents and hybrid combinations that are promising to achieve new favorable combinations. F1 hybrids, F2 populations and the parents were evaluated in the city of Gurupi, Tocantins, Brazil. F1 generation and its parents were evaluated in a greenhouse, and the F2 generation in the field. The measured parameters were: number of days to flowering and to maturity, number of seeds per pod, number of pods per plant, weight of one hundred seeds and grain yield per plant. For all attributes, a significant effect for SCA was detected. Diallel analysis results were in accordance in F1 and F2 generations. M-8360 and A-7002 parents gather alleles favorable to reduce the number of days to flowering and to maturity in soybean. Hybridization M-8360 × BRS Valiosa is promising to obtain early cycle soybean strains. M-8360 and M-8867 parents are promising for population improvement programs, and their hybrid is promising to obtain superior segregant populations.

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Phosphorus use efficiency of soybean cultivars in cerrado conditions of Tocantins, Brazil

Cited by 2 publications

References 18 publications

Phosphate Fertilization Efficiency in Soybean Cultivars Indicated for Cerrado Tropical Soil Regions

Phosphate Fertilization Efficiency in Soybean Cultivars Indicated for Cerrado Tropical Soil Regions

Capacidade combinatória de genótipos de soja sob condições de cerrado de baixa latitude

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