Nitrogen Fixation and Nutritional Yield of Cowpea-Amaranth Intercrop

Mndzebele, Buhlebelive; Ncube, Bhekumthetho; Nyathi, Melvin; Kanu, Sheku Alfred; Fessehazion, Melake K.; Mabhaudhi, Tafadzwanashe; Amoo, Stephen O.; Modi, Albert T.

doi:10.3390/agronomy10040565

Cited by 13 publications

(3 citation statements)

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“…In Brazil, the cultivated area and production are about 1.35 thousand hectares and 716.9 thousand tons, respectively (CONAB, 2021). The interest of companies and family farmers is due to the crop's ability to tolerate abiotic stresses (Goufo et al., 2017; Jayawardhane et al., 2022), low fertilizer requirement, and capacity to perform biological nitrogen fixation (Mndzebele et al., 2020). Providing high‐quality food is one of the targets of breeding programs (Gondwe et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

Modeling covariance structures for genetic and non‐genetic effects in cowpea multi‐environment trials

et al. 2023

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In cowpea breeding, multi-environment trials are conducted to select lines with high yield. The occurrence of genetic and/or statistical imbalance is common in these experiments, in addition to the possibility of (co)variance between genetic and non-genetic effects. We explore the restricted maximum likelihood/best linear unbiased prediction features to select the model with the most appropriated covariance structure and compare the results with the traditional model (homogenous variances and no covariances). Then, 17 inbred lines and three cultivars were evaluated in six experiments during two crop years in the semiarid zone of Northeast Brazil. The trait evaluated was the 100-grain weight. We selected the best model considering the Akaike Information Criterion. The model with diagonal structure for the residual effects and heterogeneous compound symmetry for the genetic effects had the best fit. The predicted genetic gain of lines selected in this model was 1.18% higher compared to the traditional model. Modeling different (co)variance structures for genetic and non-genetic effects is an efficient approach in selecting superior genotypes in multi-environment trials in cowpea breeding. INTRODUCTIONThe World Health Organization (WHO, 2021) estimated that in 2020 about 149 million children under 5 were stunted, 45 million were very thin, and 38.9 million were overweight or obese. These problems are caused by malnutrition of nutrients, for example, protein, vitamins, or minerals, which occurs

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Section: Introductionmentioning

confidence: 99%

Modeling covariance structures for genetic and non‐genetic effects in cowpea multi‐environment trials

et al. 2023

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“…When growing cowpea under subsistence farming system, some rural communities add, for example, inorganic fertilizer in addition to intercropping in order to optimize use of limited productive agricultural land. Inter-cropping by rural resource-poor farmers dates back to ancient civilization and is today still being practiced" [3].…”

Section: Introductionmentioning

confidence: 99%

Impact of Different Levels of NPK and Neem Cake on Soil Health under Cowpea (Vigna unguiculata L.) Var. Gomati

Dutta,

Swaroop,

Thomas

et al. 2023

IJPSS

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A field experiment was conducted during March-June (Late Zaid) 2022 at the research farm of Department Soil Science and Agricultural Chemistry, NAI, SHUATS, laid out in Randomized Block Design. To achieve higher growth and yield of rainy cowpea variety Gomati, it was observed that application of @ 100% NPK+ @ 100% Neem Cake has shown effective growth under Prayagraj climatic conditions but also improved significantly. physical and chemical properties of soil. This physico-chemical like Bulk density, Partical density, Pore space (%), Water Holding Capacity (%), pH, Electrical conductivity (dS m-1), Organic Carbon (%), Available Nitrogen (kg ha-1), Available Phosphorous (kg ha-1), Available Potassium (kg ha-1) were analysis. Result revealed that Soil Organic carbon content, Water holding capacity and available NPK significantly increased in after harvest of cowpea in T9, whereas Bulk density (Mg m-3), particle density (Mg m-3) and pH recorded minimum value. Therefore treatment T9 was best in terms of growth, yield and economic parameters with maximum plant height, number of branches plant-1, pods plant-1, seeds pod-1, pod yield and maximum cost benefit ratio.

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“…Degefu et al (2018a) also revealed that cowpea's net contribution of nitrogen to soil could be up to 150 kg ha −1 particularly when associated with N-fixing rhizobia. Mndzebele et al (2020) further delineated that incorporating cowpea into crop production strategies could provide up to 337 kg N ha −1 from nitrogen fixation. This potential for a strong symbiotic association with rhizobia and nitrogen fixation could be a source of nitrogen supply for the crop production systems, which is economically attractive and eco-friendly to the environment and soil system.…”

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confidence: 99%

Nodulation potential and phenotypic diversity of rhizobia nodulating cowpea isolated from major growing areas of Ethiopia

Kebede

Amsalu

Argaw

et al. 2022

Agrosystems Geosci & Env

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Rhizobia are legume specific, and they need to be characterized by different methods. This study assessed the nodulation potential and phenotypic diversity of rhizobia nodulating cowpea [Vigna unguiculata (L.) Walp.] isolated from major growing areas of Ethiopia. From 30 soil samples, 28 (93.3%) samples induced nodulation. Twenty-eight isolates obtained from nodulated plants were evaluated using presumptive tests and different phenotypic characteristics. On yeast extract mannitol agar (YEMA) containing Congo red (CR), the isolates produced colony colors that were whitish to pale pink. All isolates showed no growth on peptone glucose agar and the isolates were capable of growing on ketolactose medium but did not turn the media color to yellow. All the isolates were also confirmed to be gram-negative, rodshaped, and nonspore-forming. The colony texture study revealed that 78.57% of the isolates had a large mucoid colony, whereas 21.43% exhibited a large watery colony texture with diameters ranging between 1 and 5 mm. Depending on the colony color on YEMA containing bromothymol blue, 22 (78.57%) isolates were slow growing, whereas six (21.43%) isolates were fast-growing rhizobia. The cluster analysis based on phenotypic characteristics revealed a grouping of the isolates into two clusters at a similarity level of 75% and six further subclusters at a similarity level of ∼91%, indicating variations and diversity among the isolates. Overall, this study revealed significant variations among the cowpea nodulating rhizobial isolates and suggested that the soils of Ethiopia harbor populations of phenotypically diverse isolates. A further test to confirm these findings using genetic characterization and inclusion of reference strain is highly recommended. INTRODUCTIONCowpea [Vigna unguiculata (L.) Walp.] is a multifunctional legume crop that provides food for humans, feed for livestock, and serves as a valuable and dependable revenue-generating commodity for farmers and grain traders. Cowpea can fix Abbreviations: BTB, bromothymol blue; CR, Congo red; YEMA, yeast extract mannitol agar.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Nitrogen Fixation and Nutritional Yield of Cowpea-Amaranth Intercrop

Cited by 13 publications

References 43 publications

Modeling covariance structures for genetic and non‐genetic effects in cowpea multi‐environment trials

Modeling covariance structures for genetic and non‐genetic effects in cowpea multi‐environment trials

Impact of Different Levels of NPK and Neem Cake on Soil Health under Cowpea (Vigna unguiculata L.) Var. Gomati

Nodulation potential and phenotypic diversity of rhizobia nodulating cowpea isolated from major growing areas of Ethiopia

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