Population Density on Cowpea Cultivars With Different Growth Habits in the Matopiba Region

Cardoso, M. J.; Melo, F. de B.; Ribeiro, V. Q.

doi:10.1590/1983-21252018v31n127rc

Cited by 8 publications

(10 citation statements)

References 9 publications

(7 reference statements)

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“…A similar result was observed by Cardoso, Melo and Ribeiro (2018), who evaluated the production performance of three cowpea cultivars of different types of growth habit, as a function of population density, in the MATOPIBA region, and observed that the production component most correlated with grain yield was the number of pods per area.…”

Section: Resultssupporting

confidence: 83%

“…Reduction of NPP with increased plant density was also observed by Cardoso, Melo and Ribeiro (2018), who evaluated the production performance of three cowpea cultivars with different types of growth habit as a function of population density, in the MATOPIBA region, and concluded that the number of pods per plant responded linearly to the increase in plant density, indicating that for the increase of one plant per square meter, there were reductions of 0.213, 0.166 and 0.378 pods per plant for cultivars with upright, semi-erect and semiprostrate growth habits, respectively.…”

Section: Resultsmentioning

confidence: 74%

“…In this context, some studies have been conducted to define the density and/or spacing of cowpea plants that promotes maximum grain yield in irrigated or rainfed production system (SOUZA et al, 2011;BEZERRA et al, 2012;SANTOS, 2013;BEZERRA et al, 2014;LOCATELLI et al, 2014;OLIVEIRA et al, 2015;COSTA JÚNIOR et al, 2017;MONTEIRO et al, 2017;CARDOSO, MELO and RIBEIRO, 2018). However, the optimal planting density is variable due to the conditions of soil, climate and plant growth habit.…”

Section: Introductionmentioning

confidence: 99%

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Production Performance of BRS Tumucumaque Cowpea Under Different Plant Densities and Water Regimes1

Júnior¹,

Bastos

Cardoso

et al. 2020

Rev. Caatinga

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Cowpea is a legume of great socioeconomic importance for the North and Northeast regions of Brazil. However, studies to evaluate its production performance when cultivated under irrigated regime and under different plant densities are necessary. The objective of this work was to evaluate the effects of different water regimes and different plant densities on grain yield, production components and water use efficiency, and on the correlation between grain yield and production components of BRS Tumucumaque cowpea cultivar. The experiment was carried out at Embrapa Meio-Norte experimental area, in Teresina, Piauí State, Brazil, from June to September 2017, in an Argissolo Vermelho-Amarelo eutrófico (Ultisol). A randomized complete block design was used, in a split-plot scheme with four replicates, in which the water regimes occupied the plots (187.7; 233.5; 263.5 and 288.7 mm) and plant densities, the subplots (12; 16; 20 and 24 plants m-2). The number of pods per plant, number of pods per square meter, pod length, dry grain yield and water use efficiency were evaluated. The maximum dry grain yield reached was 1,694.46 kg ha-1, with application of 288.7 mm and density of 20.4 plants m-2. The production component number of pods per square meter was the most correlated with dry grain yield.

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Production Performance of BRS Tumucumaque Cowpea Under Different Plant Densities and Water Regimes1

Júnior¹,

Bastos

Cardoso

et al. 2020

Rev. Caatinga

Self Cite

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“…A produtividade máxima de grãos obtida para a cultivar Guariba está relacionado principalmente ao porte da planta que foi favorecida pelas condições climáticas da savana. Pesquisas relatam que genótipos de feijão-caupi de porte semi-eretos apresentam os maiores rendimentos, quando cultivados em grandes densidades populacionais (CARDOSO et al, 2018).…”

Section: Resultsunclassified

Densidade de plantio do feijão-caupi na produtividade da cultura e na supressão das plantas daninhas

Sousa¹,

Castro²,

Damasceno³

et al. 2019

Rev Agr Acad

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Densidade de plantio do feijão-caupi na produtividade da cultura e na supressão das plantas daninhas. Planting density in cowpea productivity and weed suppression. ________________________________________________________________________________ ResumoObjetivou-se avaliar a influência da densidade de plantio do feijão-caupi sobre a produção e a supressão de plantas daninhas. Foram utilizados as cultivares BRS Aracê e BRS Guariba. Utilizou-se o esquema em parcela subdividida no delineamento de blocos casualizados. Os tratamentos da parcela foram as densidades e a subparcela os métodos de controle de plantas daninhas. Para a cultivar Aracê as populações de plantas que maximizaram a interceptação da irradiância foram de 166.667 e 181.739 plantas ha -1 , antes do florescimento e no florescimento pleno, respectivamente. Os maiores números de vagens por parcela e produtividade de grão foram encontrados nas populações de 128.000 e 121.000 plantas ha -1 na cv.BRS Aracê. Palavras-chave: Vigna unguiculata L, competição, população de plantas AbstractThe objective of this research was to evaluate the influence of the planting density of cowpea on the production and weed suppression. The cowpea cultivars used were BRS Arace and BRS Guariba. The experiment was a split plot scheme in a randomized complete block design. The plots treatments were the densities and the subplots were the weed control methods. The BRS Arace populations that maximized the interception of irradiance were 166,667 and 181,739 plants ha -1 , before flowering and during the full bloom, respectively. The highest numbers of pods per plot and grain productivity were found in the populations of 128,000 and 121,000 ha -1 plants in BRS Arace.

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“…Since 2015, Midwest Region afforded the second major region producer in the rank of cowpea production, followed by Northeast [1], due to many efforts in achieving completely mechanized cropping, whereby cropping fields and grain yield has been enlarging mainly in Mato Grosso state [2]. Currently, the decreasing of cowpea productivity in Northeast region is due to inappropriate technological agricultural practices, such as low-density plant population in the field, sowing non-bred seeds, and mainly cropping in nitrogen deficient soils [3,4,5]. But, in North and Northeast regions the seeds used by farmers are mainly the grains the producers save from the previous year production, without regards to the vigor of the seeds that must be substituted by five and five years.…”

Section: Introductionmentioning

confidence: 99%

Path Analysis in Cowpea Reveals Protein Accumulation Dependency of Mineral Nutrients Accumulation

Costa

Melo

Mano

2019

JEAI

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This work aimed at evaluating the effects of the nutrients on the protein content of cowpea grains. The trial was carried out in completely randomized design, in the Instituto Federal do Ceará (Federal Institute of Ceará), Limoeiro do Norte, Ceará State, Brazil, between October and November 2018. Grains of 10 cowpea cultivars were evaluated about its mineral nutrient phosphorus, potassium, calcium, magnesium, sulfur, chlorine, iron, zinc, copper, manganese, boron, sodium and protein contents. The seeds of the cultivars were obtained from the farmers market in three municipalities of the Ceará State, Brazil, in the crop year 2017. The components of variances within and between families were computed by analysis of variance, and the genetic variance and correlation were therefrom estimated. The statistical analyses of variance, Pearson’s correlation and Path analysis were carried out. The protein content broad sense heritability was 60.47%, and the other cowpea traits evaluated had high broad heritability values, ranging from 49.91% (sulfur content) to 99.69% (zinc content). No mineral nutrient content presented any genotype correlation with protein content, that is, no gene function is related to mineral nutrients and protein accumulation. Potassium (0.44), chlorine (0.38) and calcium (0.35) presented the higher path coefficients in protein of cowpea accumulation but are still weak indices (<0.50) to be indicated for screening. In screening cowpea cultivars for protein content, potassium and related traits are not the most important but present some degree of dependency with protein accumulation in the grains, resulting from path effects.

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Population Density on Cowpea Cultivars With Different Growth Habits in the Matopiba Region

Cited by 8 publications

References 9 publications

Production Performance of BRS Tumucumaque Cowpea Under Different Plant Densities and Water Regimes1

Production Performance of BRS Tumucumaque Cowpea Under Different Plant Densities and Water Regimes1

Densidade de plantio do feijão-caupi na produtividade da cultura e na supressão das plantas daninhas

Path Analysis in Cowpea Reveals Protein Accumulation Dependency of Mineral Nutrients Accumulation

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