Does Nitrogen Matter for Legumes? Starter Nitrogen Effects on Biological and Economic Benefits of Cowpea (Vigna unguiculata L.) in Guinea and Sudan Savanna of West Africa

Rahman, Nurudeen Abdul; Larbi, Asamoah; Kotu, Bekele Hundie; Tetteh, F. M.; Hoeschle‐Zeledon, Irmgard

doi:10.3390/agronomy8070120

Cited by 16 publications

(9 citation statements)

References 11 publications

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“…However, these average yields were different in relation to research proposed [74,75] where average yields were of 724-844 kg/ha, and 526.5-7645.1 kg/ha. The average seed yield treated with insecticide (654.3 kg/ha) and untreated with insecticide (266.1 kg/ha) in our study was lower than the value achieved [76], reaching 60.7-1184.2 kg/ha. Conversely, the yields obtained in grains (684 kg/ha) were lower than the potential yield (1500 kg/ha of grains) with insecticides used for genotypes recorded by the National Institute of Research and Agronomic Studies (INERA) [77].…”

Section: Control Management Of Insecticide In Semi-arid Regioncontrasting

confidence: 78%

Modeling of Cowpea (Vigna unguiculata) Yield and Control Insecticide Exposure in a Semi-Arid Region

Carvalho

Halecki

2021

Plants

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The aim of this study was to evaluate the adaptability of different genotypes of cowpea (Vigna unguiculata L. Walp.) in the edaphoclimatic conditions of a semi-arid region. In the experimental design, a completely randomized split-plot (2 × 8), with 3 repetitions (blocks) was used. The experiment comprised 7 new genotypes and 1 local genotype as the first main factor and application of insecticide as a secondary factor. Two-factor analysis of variance (two-way ANOVA) determined the differences between the treated and untreated plots. The results obtained in the experiment showed that the introduced genotypes V3 (IT07K-181-55), V7 (H4), and V5 (IT97K-556-4M) adapted well to the edaphoclimatic conditions of the study area and their yields were respectively 1019, 1015, and 841 kg/ha of grains in treated plots and 278, 517 and 383 kg/ha in untreated plots. Multivariate analysis revealed that the most important parameter was the germination rate. Finally, the best yield was obtained with the genotype V3 (IT07K-181-55), subjected to the use of insecticide, and with the V7 (H4) genotype in untreated plants. The findings presented in this research should be useful in crop system agricultural programs, particularly in the terms of selection of cultivating systems suitable for high-yielding cowpea.

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Section: Control Management Of Insecticide In Semi-arid Regioncontrasting

confidence: 78%

Modeling of Cowpea (Vigna unguiculata) Yield and Control Insecticide Exposure in a Semi-Arid Region

Carvalho

Halecki

2021

Plants

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“…The authors provided some explanation for this observation, suggesting that the lack of a decrease in Zn content when only high P rate was applied may be due to applied P being fixed in certain soil compounds. However, application of N, a known element that could enhance the early establishment of cowpea [62] and uptake of P from soil [63], may be responsible for decreased Zn content when N and P fertilizers were applied at a high level.…”

Section: Discussionmentioning

confidence: 99%

High Soil Phosphorus Application Significantly Increased Grain Yield, Phosphorus Content but Not Zinc Content of Cowpea Grains

et al. 2021

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To ameliorate the impact of soil phosphorus (P) deficiency on cowpea, the use of P-based fertilizers is recommended. Plant zinc (Zn) is an essential nutrient required by plants in a wide range of processes, such as growth hormone production and metabolism. However, a negative association between plant Zn content and high P application has been reported in some crops. There are few reports about soil P application and plant Zn content relationship on cowpea. Thus, this study investigated the response of cowpeas to three P rates in the screenhouse (0, 1.5, and 30 mg P/kg) and field (0, 10, and 60 kg P2O5/ha) and their effects on plant P and Zn content, biomass, and grain yield. In the screenhouse, shoot and root dry weights, and shoot P and Zn content were measured. Shoot dry weight, grain yield, grain P, and Zn contents were determined from field plants. Higher rates of P led to increased shoot biomass and grain yield of the field experiment but were not associated with a significant change in shoot or grain Zn content. There was not a significant correlation between grain yield and Zn content in high soil P (p < 0.05). The effect of higher P application on reduced plant Zn contents may be genotype-dependent and could be circumvented if genotypes with high Zn content under high soil P are identified.

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“…The authors provided some explanation for this observation suggesting that the lack of decrease in Zn content when only high P rate was applied may be due to applied P being xed in certain soil compounds. However, application of N, a known element that could enhance the early establishment of cowpea (Abdul Rahman et al, 2018) and uptake of P from soil (Ngwene et al, 2010), may be responsible for decreased Zn content when N and P fertilizers were applied at a high level.…”

Section: Discussionmentioning

confidence: 99%

High soil phosphorus application significantly increased grain yield, phosphorus content but not zinc content of cowpea grains

Mohammed

Dzidzienyo

Yahaya

et al. 2021

Preprint

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Background and aims Phosphorus (P) is limiting in many soils of cowpea producing areas. To ameliorate the impact of soil P deficiency, the use of P-based fertilizers is highly recommended. However, a negative association between zinc (Zn) content and high P application has been reported in some crops. There are few reports about P-Zn interaction on cowpea. Thus, in this study, the response of cowpea to the varying amounts of P and their effect on plant P and Zn content, and yield were investigated.Methods Thirty genotypes were grown at three P rates in screenhouse and field environments. In the screenhouse, shoot biomass, P and Zn content were measured at 55 days after sowing. In the field, grain yield, P, and Zn content were determined in the harvested tissues when plants reached full maturity.Results Higher rates of P in the growth media led to significantly increased shoot biomass, and grain yield but were not associated with a significant change in shoot or grain Zn content. There was not a significant correlation between grain yield and Zn content in high soil P (p < 0.05). The site regression analysis revealed that the first two principal components explained 69.76%, and 22.30% of total variance for grain yield, and 69.01% & 24.66% of total variance for Zn content.Conclusions The effect of higher P application on reduced shoot and grain Zn content may be genotype-dependent and could be circumvented if genotypes with high Zn content under higher P supply are identified and cultivated.

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Does Nitrogen Matter for Legumes? Starter Nitrogen Effects on Biological and Economic Benefits of Cowpea (Vigna unguiculata L.) in Guinea and Sudan Savanna of West Africa

Cited by 16 publications

References 11 publications

Modeling of Cowpea (Vigna unguiculata) Yield and Control Insecticide Exposure in a Semi-Arid Region

Modeling of Cowpea (Vigna unguiculata) Yield and Control Insecticide Exposure in a Semi-Arid Region

High Soil Phosphorus Application Significantly Increased Grain Yield, Phosphorus Content but Not Zinc Content of Cowpea Grains

High soil phosphorus application significantly increased grain yield, phosphorus content but not zinc content of cowpea grains

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