Avaliação da fixação biológica de nitrogênio em feijão-caupi submetido a diferentes manejos da vegetação natural na savana de Roraima.

Bastos, Victorio Jacob; Melo, Djair Alves de; Alves, José Maria Arcanjo; Uchôa, Sandra Cátia Pereira; Silva, Paula Monique Carvalho da; Teixeira, Davair Lopes

doi:10.18227/1982-8470ragro.v6i2.851

Cited by 11 publications

(9 citation statements)

References 14 publications

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“…14 n. 3, e2309 - Taubaté 2019 2017 Sousa et al (2013) and Rebouças et al (2010) obtained positive response with gains in shoot dry matter. Using bovine manure to fertilize cowpea at 35 days after planting, Bastos et al (2012) found fresh shoot matter of 27.30 g per plant.…”

Section: Svmentioning

confidence: 99%

Contents of macronutrients and growth of ‘BRS Marataoã’ cowpea fertigated with yellow water and cassava wastewater

Araújo¹,

Lima²,

Ramos³

et al. 2019

Rev. ambiente água

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Agricultural utilization of yellow waters associated with cassava wastewater is a sustainable technique, since it allows reduction of costs related to acquisition of industrialized fertilizers and minimizes the environmental pollution caused by the inadequate disposal of these effluents. In this context, this study evaluated the macronutrient macronutrient content and growth of cowpea fertigated with yellow water associated with cassava wastewater and NPK as source of nutrients. The experiment was set up in a greenhouse located at Campus I of the Federal University of Campina Grande. The experimental design was completely randomized, composed of five treatments characterized by: fertigation with mineral fertilizers, in the form of NPK; organic fertigation composed of human urine, cassava wastewater, human urine plus cassava wastewater; and organo-mineral fertigation composed of urine, cassava wastewater and mineral phosphorus, with four replicates. At 36 days after sowing, the following parameters were determined: contents of nitrogen, phosphorus, potassium, sulfur and the variables number of leaves, plant height, stem diameter, leaf area, shoot fresh matter and shoot dry matter. The use of yellow waters promotes significant increases for growth and production variables for nitrogen and potassium contents mainly, as well as for growth and production variables. The contents of nitrogen, phosphorus and potassium were higher than the levels considered as adequate for the cowpea crop. The use of human urine and cassava wastewater have potential to meet the needs for the main macronutrients required by cowpea and the irrigation via fertigation with these biofertilizers positively influences the development of cowpea.

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Section: Svmentioning

confidence: 99%

Contents of macronutrients and growth of ‘BRS Marataoã’ cowpea fertigated with yellow water and cassava wastewater

Araújo¹,

Lima²,

Ramos³

et al. 2019

Rev. ambiente água

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“…As variáveis avaliadas foram: altura da planta, diâmetro do caule e número de folhas (BASTOS et al, 2012), realizadas no estádio fenológico V 8 (MOURA et al, 2012), enquanto as avaliações do número de vagens por planta, número de grãos por vagem, massa de mil grãos e a produtividade de grãos (SMIDERLE; SCHWENGBER, 2008;ALVES et al, 2009;ARRUDA et al, 2009;BRASIL, 2009) procedeu-se no período de maturação fisiológica da cultura, estádio fenológico R 5 (MOURA et al, 2012 O modelo polinomial que melhor se ajustou ao comportamento da variável diâmetro de caule, em função de doses de P, foi o linear (Figura 1b). Assim, cada kg de P 2 O 5 disponibilizado no sulco de semeadura promoveu incremento no diâmetro de caule de 0,00095 cm na cultura do feijão-caupi.…”

Section: Introductionunclassified

Doses de fósforo na cultura do feijão-caupi na região nordeste do Estado do Pará.

et al. 2014

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Resumo -O feijão-caupi é uma leguminosa cultivada predominantemente por pequenos produtores, representa uma das mais importantes fontes de renda e ocupação de mão de obra no meio rural do Nordeste Paraense. Objetivou-se com o presente trabalho avaliar o crescimento e a produtividade do feijão-caupi em resposta a doses de fósforo em Latossolo Amarelo. O delineamento experimental utilizado foi o de blocos ao acaso, com cinco repetições, sendo os tratamentos constituídos pelas seguintes doses: 0, 100, 200 e 300 kg ha -1 de P 2 O 5 , aplicados no sulco de semeadura, por meio da fonte superfosfato triplo (46% P 2 O 5 ). As variáveis avaliadas foram altura da planta, diâmetro do caule, número de folhas, número de vagens por planta, número de grãos por vagem, massa de mil grãos e a produtividade de grãos. A adubação fosfatada teve influência positiva em todas as variáveis avaliadas, sendo que para a produtividade de grãos observou-se que quando aplicaram doses elevadas de P 2 O 5 , maiores foram os resultados. Enquanto a altura de planta, número de folhas, número de grãos por vagem e massa de mil grãos de feijão-caupi, verificou que maiores doses de P 2 O 5 proporcionaram menor desempenho das plantas. As doses de máxima eficiência econômica foram de 156,67 à 222,22 kg ha -1 de P 2 O 5 para as variáveis altura de planta, número de folhas, número de grãos por vagens e massa de mil grãos. Doses superiores a 300 kg ha -1 de P 2 O 5 devem ser previstas em estudo de curva de resposta de feijão-caupi ao fósforo para as condições edafoclimáticas da região de Capitão Poço. Palavras-chave -Vigna unguiculata. Manejo da adubação fosfatada. Componentes da produção.Abstract -The cowpea plant is a legume managed predominantly by small farmers. It is one of the most important sources of money and occupation of the family in rural areas of the Northeast of the State of Pará. The aim of this study was to evaluate the growth and yield of cowpea plant in response to rates of phosphorus fertilizers in Yellow Latosol. The experimental design was of randomized blocks, with five replications, in which the treatments consisted of the following rates: 0, 100, 200 and 300 kg ha -1 of P 2 O 5 , applied at sowing, using the source of triple superphosphate (46% P 2 O 5 ). The variables evaluated were plant height, stem diameter, number of leaves, number of pods per plant, number of seeds per pod, thousand grain weight and grain yield. Phosphorus fertilization had a positive influence on all variables, as for grain yields, it was observed that when applied high rates of P 2 O 5 , the results were higher. As for the plant height, number of leaves, number of seeds per pod and thousand grain weight of cowpea plant, it was found that higher rates of P 2 O 5 provided lower plant performance. The rates of maximum economic efficiency were of 156.67 to 222.22 kg ha -1 of P 2 O 5 for the variables plant height, number of leaves, number of seeds per pod and thousand grain weights. The rates above 300 kg ha -1 of P 2 O 5 must be provided in a study of response...

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“…On the other hand, manure addition improved soil physical and chemical attributes, contributing to better crop development. Bastos et al (2012) obtained a higher cowpea plant height at 35 days after emergence when the natural vegetation was desiccated with glyphosate. In Roraima, the cultivars recommended for cultivation include BRS Guariba and BRS Novaera of semierect growth habit and BRS Pajeú of semi-prostrate growth habit (LOCATELLI, 2014;CASTRO et al, 2019).…”

Section: Resultsmentioning

confidence: 91%

“…Estes resultados estão condizentes com os observados por Bastos et al (2012), que obtiveram maior altura de planta de feijão-caupi, aos 35 dias após a emergência, quando a vegetação natural foi dessecada com glyphosate.Em Roraima, dentre as cultivares recomendadas para cultivo destacam-se: BRS Guariba e BRS Novaera de portes semi-ereto, e BRS Pajeú de porte semi-prostrado (LOCATELLI, 2014;CASTRO et al, 2019).…”

Section: Resultsunclassified

Cowpea subjected to organic fertilization and management of the natural vegetation of the savannah of Roraima

Melo

Silva

Alves

et al. 2021

AGRO@MBIENTE ON-LINE

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Cowpea (Vigna unguiculata (L.) Walp.) is one of the main sources of nutrients for a large part of the population. To increase your income, there is a need for proper management. This study aimed to evaluate yield components of the cowpea cultivar Aracê subjected to two levels of organic fertilization and three management of the natural vegetation of the savannah of Roraima. The experiment was set up in the experimental area of CCA/UFRR, in Boa Vista, Roraima. The experimental design was a randomized block design in a 3×2 factorial scheme, with four replications. The first factor consisted of the management of the natural vegetation: glyphosate application and cutting or not of the natural vegetation. The second factor consisted of the application or not of cattle manure. Yield components were plant height, number of trifoliate leaves, percentage of normal pods, pod length, number of grains per pod, 100-grain weight, sample grain index, total grain index, and final stand. Organic fertilization with 2 L m-2 of manure increased cowpea production. The management with vegetation cutting in areas with organic fertilization increased the final stand of cowpea plants. The desiccation of natural vegetation with glyphosate was the management that had the highest cowpea production.

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Avaliação da fixação biológica de nitrogênio em feijão-caupi submetido a diferentes manejos da vegetação natural na savana de Roraima.

Cited by 11 publications

References 14 publications

Contents of macronutrients and growth of ‘BRS Marataoã’ cowpea fertigated with yellow water and cassava wastewater

Contents of macronutrients and growth of ‘BRS Marataoã’ cowpea fertigated with yellow water and cassava wastewater

Doses de fósforo na cultura do feijão-caupi na região nordeste do Estado do Pará.

Cowpea subjected to organic fertilization and management of the natural vegetation of the savannah of Roraima

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