Agricultural crops present phenological stages of less susceptibility to soil water deficit, in which the deficit irrigation management strategy can be used. In this context, the objective was to evaluate the influence of deficit irrigation management during different stages of development in three soybean cultivars in the edaphoclimatic conditions of the southern cerrado of Piauí. The research was conducted from September 2020 to January 2021, in the municipality of Uruçuí-PI (with geographic coordinates of 07º 13’ 46” S, 44º 33’ 22” W), under an experimental design of randomized blocks, in a split-plot scheme, where the treatments, composed in the plots, were defined according to the time of induction of the water deficit of 50% of the crop’s potential evapotranspiration - ETpc, via climate, in three soybean phenological stages (vegetative, flowering and production formation), and the subplots, were composed of three cultivars (FT 4191; FT 3181 and BG 478 IPRO), with three replications. In order to verify the effects of the imposed treatments, the following variables were evaluated: plant height, number of leaves and total dry mass of the aerial part. Variables were maintained for statistical analysis by Tukey’s test (cultivars) and Scott-Knott’s test (deficient irrigation treatments). The vegetative characteristics of the investigated soybean cultivars (plant height, number of leaves and shoot dry mass production) are drastically affected when the imposition of water deficit (50% of ETpc) is induced throughout the production cycle. Under such water conditions, the FT 4181 and 3191 IPRO cultivars stood out among the investigated cultivars, thus being identified as the most tolerant to reduced water availability in their different phenological stages.
CRESCIMENTO VEGETATIVO DA MORINGA EM DISTINTOS REGIMES DE IRRIGAÇÃO ASSOCIADOS A COMPOSIÇÕES DE DIFERENTES SUBSTRATOS VALDIR MOURA DE OLIVEIRA JUNIOR1; THAYS SOUSA LOPES1; JOÃO VALDENOR PEREIRA FILHO1; JAILDO RIBEIRO BARBOSA1; ROBERT WILLIAM FERREIRA SOARES1; CARMEM CRISTINA MARECO DE SOUSA PEREIRA2 1Centro Integrado de Ensino Superior, Universidade Estadual do Piauí (UESPI), Rua Almir Benvindo, s/n, bairro Aeroporto, 64860-000, Uruçuí, Piauí, Brasil. valdirjunior@aluno.uespi.br; thayslopes@aluno.uespi.br; joaovaldenor@urc.uespi.br; jaildobarbosa@aluno.uespi.br; robertsoares@aluno.uespi.br 2 Departamento de Engenharia Agrícola, Universidade Federal Rural de Pernambuco (UFRPE), Rua Dom Manuel de Medeiros, s/n - Dois Irmãos, 52171-900, Recife, Pernambuco, Brasil. crismareco@hotmail.com 1 RESUMO A moringa possui ampla adaptabilidade e se condiciona, com muita facilidade, ao clima e solo do Nordeste brasileiro. Ainda são escassas as informações sobre a produção de mudas desta espécie sob composições de substratos associados a regimes de irrigação. Desta forma, o objetivo desse trabalho foi caracterizar o comportamento vegetativo de plantas de moringa submetidas a distintas composições de substratos e regimes de irrigação. O experimento foi realizado em ambiente telado, no período de setembro a outubro de 2020, na área experimental da Universidade Estadual do Piauí, Uruçuí. Adotou-se um delineamento experimental em esquema fatorial, sendo, o primeiro fator, dois regimes de irrigação (50 e 100% da ETo) e o segundo fator, cinco substratos (SB1 = latossolo vermelho; SB2 = substrato comercial; SB3 = solo + esterco; SB4 = solo + cinza vegetal; SB5 = solo + borra de café), com 5 repetições. Aos 45 dias após a semeadura (DAS) foram avaliadas a altura de plantas e o diâmetro do caule. Os parâmetros de crescimento inicial da cultura da moringa foram afetados significativamente pela interação (regimes de irrigação x substratos), sendo os melhores resultados obtidos, na maioria dos substratos utilizados, com a aplicação do regime hídrico de 100% da ETo. Palavras-chave: Moringa oleifera Lam, produção de mudas, déficit hídrico. OLIVEIRA JUNIOR, V. M.; LOPES, T. S.; PEREIRA FILHO, J. V.; BARBOSA, J. R.; SOARES, R. W. F.; PEREIRA, C. C. M. S. VEGETATION GROWTH OF MORINGA IN DIFFERENT IRRIGATION REGIMES ASSOCIATED WITH COMPOSITIONS OF DIFFERENT SUBSTRATES 2 ABSTRACT Moringa has wide adaptability and is very easily conditioned to the climate and soil of northeastern Brazil. Information on the production of seedlings of this species under compositions of substrates associated with irrigation regimes is still scarce. Thus, this work aimed to characterize the vegetative behavior of moringa plants submitted to different compositions of substrates and irrigation regimes. The experiment was carried out in a screened environment, from September to October 2020, in the experimental area of the State University of Piauí, Uruçuí. An experimental design was adopted in a factorial scheme, the first factor being two irrigation regimes (50 and 100% of ETo) and the second factor, five substrates (SB1 = red oxisol; SB2 = commercial substrate; SB3 = soil + manure; SB4 = soil + vegetable ash; SB5 = soil + coffee grounds), with 5 repetitions. At 45 days after sowing (DAS), plant height and stem diameter was evaluated. The initial growth parameters of the moringa crop were significantly affected by the interaction (irrigation regimes x substrates), with the best results obtained, in most of the substrates used, with the application of the water regime of 100% of ETo. Keywords: Moringa oleifera Lam, seedling production, water deficit.
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