Vegetative growth of<i>Amaranthus hybridus</i>and<i>Amaranthus tricolor</i>under different watering regimes in different seasons in southern Mozambique

Ribeiro, Jerónimo Emm; Pieterse, P. J. S.; Famba, Sebastião

doi:10.1080/02571862.2016.1266045

Cited by 15 publications

(13 citation statements)

References 19 publications

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“…e hardened B. alba seedlings were transplanted at a spacing of 30 cm × 30 m. Sixteen seedlings were accommodated in an experimental unit of a 1 m 2 area. Urea was supplemented to the plants after 15 2.6. Harvesting, Processing, and Storage.…”

Section: Experimental Designmentioning

confidence: 99%

“…erefore, a valuable aspect of the production of B. alba under maritime conditions that must be taken into consideration is the influence of the growing season weather conditions. e growth performance and quality of a vast majority of green leafy vegetables including are dependent on the length of day and temperature [15]. For instance, the nutritional quality of leafy vegetables is reduced under low-light conditions [16].…”

Section: Introductionmentioning

confidence: 99%

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Plant Growth and Nutritional Quality Attributes of Basella alba Applied with Variable Rates of Nitrogen Fertilizer at Different Planting Dates under Canadian Maritime Climatic Conditions

Natesh

Ijenyo

Asiedu

et al. 2021

International Journal of Agronomy

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Nitrogen (N) fertilization at critical planting time is important to optimize productivity and reduce nitrate accumulation in edible portions of green leafy vegetable plants. A field experiment was performed to determine the effects of variations in N rate and planting time on plant growth, yield, and nutritional quality attributes of Basella alba under Atlantic maritime climatic conditions. The N rates were 0 (control), 40 (low), 80 (medium), and 120 kg ha−1 (high) at planting times 15 June–3 August (early season), 6 July–20 August (mid-season), and 4 August–8 September (late season). Plant height, number of branches, and stem girth were increased after 45 days after sowing in early and mid-season plantings, but leaf length decreased during the same time by 32.8% in the late planting. The average yield obtained in early, mid-, and late plantings were 171, 464, and 328 g plant−1, respectively. Low N gave the highest yield in early planting while medium N gave higher yields in mid- and late plantings. However, the medium N increased nitrate accumulation in B. alba by 7% compared to the high N rate. In general, there was no significant effect of N on B. alba total phenolic and total carotenoid contents. Overall, the highest yield was obtained during the warmest summer months of mid- and late plantings. Therefore, there is a potential to grow B. alba as a summer vegetable under Canadian Atlantic maritime conditions. However, it is recommended to reduce the rate of N fertilizer application during high-temperature conditions. Future studies are required to investigate phosphorus and potassium fertilization and nitrate accumulation in B. alba and potential health risks.

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Section: Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plant Growth and Nutritional Quality Attributes of Basella alba Applied with Variable Rates of Nitrogen Fertilizer at Different Planting Dates under Canadian Maritime Climatic Conditions

Natesh

Ijenyo

Asiedu

et al. 2021

International Journal of Agronomy

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“…Taruvinga and Nengovhela (2015) reported that the consumption of various TLVs was positively correlated to their production. Research regarding potential cultivation of traditional leafy vegetables such as Amaranthus hybridus and A. tricolor (Ribeiro et al 2017), A. cruentus, Corchorus olitorius and Vigna unguiculata (Maseko et al 2015;Mavengahama et al 2016) has been initiated in South Africa.…”

Section: Cultivation `mentioning

confidence: 99%

Diversity, consumption dynamics and ethnomedical claims of traditional leafy vegetables consumed by a rural community in the KwaMbonambi area, northern KwaZulu-Natal, South Africa

et al. 2020

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Abstract. Mncwango NC, Mavengahama S, Ntuli NR, van Jaarsveld CM. 2020. Diversity, consumption dynamics and ethnomedical claims of traditional leafy vegetables consumed by a rural community in the KwaMbonambi area, northern KwaZulu-Natal, South Africa. Biodiversitas 21: 1196-1202. Traditional leafy vegetables (TLVs) are mostly wild and informally-domesticated edible plant species. Their nutritious leaves, shoot tips, flowers and fruits are consumed as vegetables, particularly by rural communities in Africa. However, their consumption and cultivation are still marginal. This study aimed to identify the most preferred TLVs, as well as factors that affect the consumption and cultivation of these species. A questionnaire was administered among 100 respondents to record the preferred TLVs; the reason (s) for preference; consumption frequency; and constraints towards consumption of these vegetable species. This study recorded a total of 18 TLVs that belong to 14 genera and 11 families. Among these, Amaranthus hybridus, A. spinosus, A. thunbergii, Bidens biternata and Corchorus olitorius were the most preferred species. Vegetables were preferred primarily based on the taste; where most people ate them once a week when they are available. The major TLV consumption constraints were seasonal availability and low shelf life. A decline in the availability of TLVs was primarily caused by drought. Regardless of the observed decline, only 23% of respondents practiced informal cultivation of Amaranthus species. Bidens pilosa, Momordica balsamina, and Corchorus olitorius vegetable species were also known to possess some medicinal values. Future research on improving taste, increasing edible plant parts and elongating shelf life for preferred TLVs, is a necessity.

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“…Studies have shown that protein levels tend to decrease in amaranth leaves as plants mature. [9][10][11] However, in a previous growth chamber experiment, our team discovered that continuous defoliation results in elevated leaf protein concentrations. 4 In the following experiments, we explored this dynamic further by measuring protein changes over time with and without continuous defoliation.…”

Section: Introductionmentioning

confidence: 99%

Defoliation timing for optimal leaf nutrition in dual‐use amaranth production systems

et al. 2020

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BACKGROUND Amaranth leaves can provide important nutrients to small‐scale farming families growing amaranth for seed. Amaranth is known to be tolerant to defoliation, but there is little guidance on when defoliation should be performed for optimal nutritional benefits. This series of experiments assessed tolerance to defoliation at different points throughout the vegetative stage of development, in addition to the nutritional benefits and flavor of amaranth leaves at each stage. RESULTS Overall, timing of defoliation had no impact on seed yield or quality. Fifty percent defoliation at any point did not significantly reduce seed yield, whereas 100% defoliation throughout development reduced seed yield. The nutritional value of amaranth leaves differed substantially throughout development, with the highest concentrations of iron mid‐way through vegetative development, and the highest levels of vitamin A, magnesium, and copper at the end of the vegetative development stage. Palatability was highest in young leaves, and decreased as plants aged. We also found that neither timing nor intensity of defoliation had an influence on branching, which can negatively influence ease of harvest. CONCLUSIONS These results indicate that amaranth leaves are a nutritious food source that provides vital nutrients at different concentrations throughout development. Farmers who wish to harvest both leaves and seeds can harvest up to 50% of the leaves at any point during vegetative development or bud formation while maintaining seed yield. Leaf harvest timing can thus be tailored to nutritional needs, although palatability decreases with plant age. © 2020 Society of Chemical Industry

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Vegetative growth ofAmaranthus hybridusandAmaranthus tricolorunder different watering regimes in different seasons in southern Mozambique

Cited by 15 publications

References 19 publications

Plant Growth and Nutritional Quality Attributes of Basella alba Applied with Variable Rates of Nitrogen Fertilizer at Different Planting Dates under Canadian Maritime Climatic Conditions

Plant Growth and Nutritional Quality Attributes of Basella alba Applied with Variable Rates of Nitrogen Fertilizer at Different Planting Dates under Canadian Maritime Climatic Conditions

Diversity, consumption dynamics and ethnomedical claims of traditional leafy vegetables consumed by a rural community in the KwaMbonambi area, northern KwaZulu-Natal, South Africa

Defoliation timing for optimal leaf nutrition in dual‐use amaranth production systems

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