Varietal Trials and Physiological Components Determining Yield Differences among Cowpea Varieties in Semiarid Zone of Nigeria

Kamai, Nkeki; Gworgwor, N. A.; Wabekwa, J. W.

doi:10.1155/2014/925450

Cited by 7 publications

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In other words, even when considering the lowest CPD 0.25 , there was still a 25% probability that the simulated yield under either T 0 or T 1 treatment would still be greater than the average yield of 588.4 kg ha -1 (considering the calibrant Y2014). Furthermore, the yield range under both treatments was consistent with that reported by (Saka et al, 2018;Kamai, 2014) for semi-arid zone of Nigeria; but comparatively higher than that reported by (Kimiti et al, 2009) in the semi-arid zone of Eastern Kenya. The results of the five-years simulation study showed that, fertigation using human urine is a viable and stopgap indispensable option to obviate any shortcomings of inorganic fertilizer availability and supply for smallholder farmers in Africa.…”

Section: Biophysical Analysis: Grain Yield and Fertigationsupporting

confidence: 90%

Using the DSSAT-CROPGRO model to simulate gross margin and N-leaching of cowpea fertigated with human urine

Lomeling

Huria

2020

Arch. Agric. Environ. Sci.

View full text Add to dashboard Cite

This study simulated the biophysical, economic and environmental implications of cowpea fertigated with human urine (equivalent to 60 kg N ha-1) as source of organic N. The DSSAT CROPGRO model was used to simulate harvested cowpea yield, N (leached) , N (uptake) , monetary returns or gross margins in ($) under two different treatments: without fertigation or human urine (T 0) and with fertigation (T 1). Biophysical analysis using the Cumulative Probability Distribution (CPD) showed a 50% probability of the harvested cowpea yield under T 1 being higher than under T 0 at 1060 and 600 kg ha-1 respectively, accounting for a 43.4% difference. The Mean Gini Stochastic Dominance (MGSD) analysis was used to assess the gross margin and helped in deciding on the best strategic and management option. The findings of this study revealed a 50% probability (CPD 0.5), of higher gross margin under T 1 at $-215 higher than under T 0 at $285. This was a $70 difference per season under T 1 and so enhancing a faster payback and a larger monetary return on overall investments. Similarly, seasonal analysis with fertigation showed that at CPD 0.5 , the N (leached) was still < 4 kg N ha-1 per season and so posed no environmental risks. The simulation results also showed higher a probability of N (uptake) of about 270 kg N ha-1 during fertigation compared to about 95 kg N ha-1 under T 0. Therefore, the DSSAT CROPGRO model can be used to successfully forecast future cowpea yields, gross margin, N (leached) , N (uptake) under different management practices to enable smallholder farmers in South Sudan make informed decisions on sustainable cowpea production.

show abstract

Section: Biophysical Analysis: Grain Yield and Fertigationsupporting

confidence: 90%

Using the DSSAT-CROPGRO model to simulate gross margin and N-leaching of cowpea fertigated with human urine

Lomeling

Huria

2020

Arch. Agric. Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…Total seed protein content ranges from 23% to 32% of seed weight (Cruz et al, 2014). It is estimated that cowpea supplies about 40% of the daily protein requirements to most of the people in Nigeria (Kamai et al, 2014). Dry mature seeds are also suitable for boiling and canning.…”

Section: Introductionmentioning

confidence: 99%

Cowpea Crude Protein as Affected by Cropping System, Site and Nitrogen Fertilization

Sebetha¹,

Modi²,

Owoeye³

2014

JAS

View full text Add to dashboard Cite

High protein content in cowpea (Vigna unguiculata (L.) Walp.) is considered as major advantage for its use in nutritional components. In this way, an experiment was conducted to investigate the effect of cropping system, site, and nitrogen fertilization on cowpea crude protein. The study comprised of three cropping systems (Maize-cowpea rotation, monocropping cowpea and intercropped cowpea), three sites (Potchefstroom, Taung, and Rustenburg, South Africa) and two rates of nitrogen fertilizers applied in kg ha -1 at each site (0 and 20 at Potchefstroom, 0 and 17 at Rustenburg, 0 and 23 at Taung). Moreover, a factorial experiment randomized in complete block design with three replications was conducted during 2011/12 and 2012/13 planting seasons. The protein content was determined from green leaves harvested before flowering, immature green pods and seeds during reproductive stage and maturity. Results showed that cropping system had significant effect on cowpea leaf protein content (P < 0.05). Intercropped cowpea significantly gave higher leaf protein (26.7% more) content than rotational cowpea. Cowpea planted at Taung had significantly higher leaf protein (30.1% more) content as compared to cowpea planted at other sites. Application of nitrogen fertilizer contributed to higher protein content of immature pods. Moreover, cowpea protein content differs among the different locations due to different soil types and climatic conditions.

show abstract

“…The grain yield obtained in this study (1338 -1761 kg ha -1 ) though not up to the potential yield of the varieties (2000-2600 kg ha -1 ) (Nigerian seed portal, 2018) is a big improvement on the average of 350-450 kg ha -1 obtained on farmers' fields in Nigeria [KAMAI & al. 2014;OMOTOSO, 2014].…”

Section: Discussionmentioning

confidence: 93%

Symbiotic Effectiveness of Brazilian Rhizobial Strains in Improving N-Fixation and Productivity of Cowpea in Minna, Southern Guinea Savanna of Nigeria

Adediran¹,

Osunde²,

Bala³

et al. 2019

J. Plant Develop.

View full text Add to dashboard Cite

In a bid to evaluate the effectiveness of two Brazilian rhizobial strains in improving nitrogen fixation and productivity of cowpea (Vigna unguiculata (L.) Walp) in the southern Guinea savanna of Nigeria, field trials were conducted in 2016 and 2017. Four rhizobial inoculation levels (control, inoculation with BR 3262, BR 3267 and application of 90 Kg N ha-1) and three varieties (IT93K-452-1, IT99K-573-1-1 and TVx 3236) were arranged in randomized complete block design. Inoculation with BR 3267 significantly increased nodule number by 27% over the control in 2017 and there was significant variation in the response of the varieties to inoculation in the two years in respect of nodule weight. Plants fertilized with 90 Kg N ha-1 consistently had the least number of nodules, weight and percentage of effective nodules in the two years. N-uptake and shoot biomass yield was however significantly higher in the N-fertilized and uninoculated plants than plants inoculated with the BR strains. Plants inoculated with both strains fixed significantly lower nitrogen than the uninoculated plants. However, the inoculated plants partitioned greater nitrogen to their seeds having significantly higher % protein in their seeds than the uninoculated plants. Plants fertilized with 90 kg Nha-1 had the highest grain yield (1761.2 kg ha-1) which was at par with the value recorded in the uninoculated plants (1479.60 Kg ha-1) but significantly higher than the values recorded in the inoculated plants (1320.1-1338.0 Kg N ha-1). It could therefore be concluded that the BR strains tested in this study are not more effective than the indigenous strain in improving N-fixation and productivity of cowpea in the study area.

show abstract

Varietal Trials and Physiological Components Determining Yield Differences among Cowpea Varieties in Semiarid Zone of Nigeria

Cited by 7 publications

References 13 publications

Using the DSSAT-CROPGRO model to simulate gross margin and N-leaching of cowpea fertigated with human urine

Using the DSSAT-CROPGRO model to simulate gross margin and N-leaching of cowpea fertigated with human urine

Cowpea Crude Protein as Affected by Cropping System, Site and Nitrogen Fertilization

Symbiotic Effectiveness of Brazilian Rhizobial Strains in Improving N-Fixation and Productivity of Cowpea in Minna, Southern Guinea Savanna of Nigeria

Contact Info

Product

Resources

About