Evolution of Cowpea Productivity for the Main Producers of Northeast Paraense From 2000 to 2014

Moreira, Wendel Kaian Oliveira; Oliveira, Shirlene Souza; Alves, José Darlon Nascimento; Ribeiro, Rian Antonio dos Reis; Oliveira, Inayara Albuquerque; Sousa, Luiz Augusto Silva de

doi:10.3738/1982.2278.1692

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…In the State of Pará, Brazil, cowpea (Vigna unguiculata (L.) Walp.) average yield was 821 kg ha -1 (14.4 sc ha -1 ) with a drop in productivity due to rainfed cultivation, irrigation by non-traditional methods, difficulty in accessing information, and the lack of technical assistance in small properties (IBGE, 2017;Moreira et al, 2017;SEDAP, 2017).…”

Section: Introductionmentioning

confidence: 99%

Actual evapotranspiration and response factors of the cowpea in Amazonian edaphoclimatic conditions

Moura

Farias

Nunes

et al. 2021

Rev. bras. eng. agríc. ambient.

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Due to the sensitivity of the cowpea to water deficit during the dry season in the Amazonian environment, there is a need for studies related to water management and the optimization of annual yield. Thus, the objective was to estimate the crop evapotranspiration (ETc) and the actual evapotranspiration (ETr), whilst also evaluating the effect of different irrigation depths on the yield response factor (Ky) and dry biomass (Kss) of the cowpea cultivar BR3-Tracuateua under edaphoclimatic conditions in the Amazon region. The experiment was carried out in randomized blocks, with six replicates and four treatments: T1 (100% ETc), T2 (50% ETc), T3 (25% ETc), and T4 (0% ETc), commencing in the reproductive phase with a drip irrigation system. The total evapotranspiration recorded for the cowpea cultivar BR3-Tracuateua across the four treatments was 337.5, 284.35, 258.62, and 219.82 mm with an average consumption of 4.6, 3.90, 3.54, and 3.01 mm d-1 for T1, T2, T3, and T4, respectively. The emergence phase showed evaporation rate of 5.19 mm d-1 and the reproductive, vegetative, and senescence ETc phases showed evaporation of 4.87, 4.84, and 3.32 mm d-1, respectively. The flowering stage had the greatest water demand (5.88 mm d-1). There was a significant difference in the crop yield among all treatments, with decreases of 18.91, 33.12 and 57.17% for T2, T3 and T4 in the grain yield, with a Ky of 1.48, and Kss of 2.03, 1.08, and 0.87 for the flowering, grain filling, and physiological maturation stages, respectively.

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Section: Introductionmentioning

confidence: 99%

Actual evapotranspiration and response factors of the cowpea in Amazonian edaphoclimatic conditions

Moura

Farias

Nunes

et al. 2021

Rev. bras. eng. agríc. ambient.

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Performance of Cowpea under Different Water Regimes in Amazonian Conditions

et al. 2022

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Water availability is a crucial factor in the final productivity of cowpea. The objective of this work was to evaluate the production and productivity components of cowpea under different irrigation depths in Amazonian conditions. The experiment was carried out at the School Farm of the Federal Rural University of Amazonia, in the municipality of Castanhal-PA, using the cultivar BR3 Tracuateua, from September to November 2014, 2015, and 2016. The experimental design was conducted on six blocks and four treatments, where the four irrigation depths of 0, 25, 50, and 100% of crop evapotranspiration were tested. The productivity analysis was performed when 90% of the plants were in the phenological stage R9. The evaluated production components were pod length, number of pods per plant, number of grains per pod, mass of one hundred grains, and harvest index. There was a statistical difference among all treatments for the components of production and among productivities. An average reduction of 827 kg ha−1 in cowpea productivity was observed during the three years of study, when the treatment without irrigation was compared with the treatment irrigated with 100% of the crop’s water demand. It was found in this research that the simple fulfillment of the nutritional and phytosanitary demands of the crop, associated with an adequate planning of when to plant in the region, would already help in the improvement of local production when choosing times where the water deficit in the reproductive phase is less than 33 mm.

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Gibberellic Acid Utilization in Seeds and Plants of Beans: Effect on Growth and Seeds Physiological Quality

Jaques¹,

Carvalho²,

Szareski³

et al. 2019

JAS

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The growth regulators from gibberellins, when applied on plants, might improve physic and physiological features, stimulate cell division and elongation, this study aimed at evaluating the influence of gibberellic acid doses applied exogenously on bean crop through seed treatment, and analyzing its effects on morphological attributes of seedlings and physiological quality of the seeds produced. The experimental design was completely randomized design, with treatments corresponding to the doses: zero (distilled water only), 50, 100 and 200 mg L-1, arranged in four replicates. The use of gibberellic acid in bean seeds did not result in changes on the number of leaves, leaf area, dry mass of leaves and stem. Applications of foliar gibberellic acid potentiated stem height and root dry mass of seedlings.

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Evolution of Cowpea Productivity for the Main Producers of Northeast Paraense From 2000 to 2014

Cited by 3 publications

References 4 publications

Actual evapotranspiration and response factors of the cowpea in Amazonian edaphoclimatic conditions

Actual evapotranspiration and response factors of the cowpea in Amazonian edaphoclimatic conditions

Performance of Cowpea under Different Water Regimes in Amazonian Conditions

Gibberellic Acid Utilization in Seeds and Plants of Beans: Effect on Growth and Seeds Physiological Quality

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