Influences of spacing on yield and root size of carrot (<i>Daucus carota</i>L.) under ridge-furrow production

Tegen, Habtamu; Jembere, Mnuyelet

doi:10.1515/opag-2021-0062

Cited by 6 publications

(2 citation statements)

References 18 publications

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“…High plant density (90,000 plants per ha) reduced the number of nodal roots, lateral root density, and average lateral root length in field-grown maize [38]. Tegen et al [39] reported that the highest root diameter of carrots occurred at the widest interrow spacing of 30 cm. Lower plant density has also been reported to increase average root weight and dry matter content for radishes [40].…”

Section: Root Number Root Fresh Weight and Root Dry Weightmentioning

confidence: 99%

Effect of Plant Density on Growth and Bioactive Compounds in Salvia miltiorrhiza

Xing,

Bi,

et al. 2024

Agronomy

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Danshen (Salvia miltiorrhiza) is an herbaceous plant widely used in the pharmaceutical industry. However, the majority of medicinal plants utilized in the US are imported, posing challenges such as fluctuations in bioactive compound concentrations and insufficient supply to meet demand. Determining the optimal plant density is a key management decision for danshen production. This study aimed to investigate the effects of different plant densities on the growth and bioactive compound content of danshen cultivated in Mississippi. A field experiment was conducted to investigate the effects of different plant densities on individual plant growth, photosynthesis, and the content of bioactive components in danshen in 2020 and 2021. Six plant densities were designed: 30 × 20 cm (between row spacing × within row spacing), 30 × 30 cm, 30 × 40 cm, 45 × 20 cm, 45 × 30 cm, or 45 × 40 cm. A plant density of 45 × 40 cm resulted in danshen plants exhibiting the highest Plant Growth Index (PGI), SPAD, root number, shoot number, shoot fresh and dry weight, maximum root diameter, maximum root length, net photosynthesis, intracellular CO2 concentration, tanshinone I, and cryptotanshinone, regardless of year. Plants spaced at 45 × 30 cm had similar root fresh weight, root dry weight, and tanshinone IIA and salvianolic acid B levels compared with plants grown at the 45 × 40 cm spacing, and both were significantly higher than other densities.

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Section: Root Number Root Fresh Weight and Root Dry Weightmentioning

confidence: 99%

Effect of Plant Density on Growth and Bioactive Compounds in Salvia miltiorrhiza

Xing,

Bi,

et al. 2024

Agronomy

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“…Carrot yields per unit area in most developing countries remain below the recommended world average [53]. In Nigeria, cool-season vegetables are mainly grown in highaltitude regions of Northern districts where a mild subtropical climate prevails [6].…”

Section: Introductionmentioning

confidence: 99%

Response of Carrots (Daucus carota) on the Growth, Yield, and Nutritional Composition to Varying Poultry Manure Rates

Eze,

Mukosha,

Anozie

et al. 2024

Agric Res

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Carrot cultivation in south-eastern Nigeria could reduce the need to transport carrots from northern regions. To explore this, a field experiment with three replications was carried out in Nsukka, south-eastern Nigeria, focusing on four carrot varieties (Carotte Touchon, Touchon Mega, Super Mega, and Touchon France) and three poultry manure rates (0, 10, and 20 t ha−1). The study revealed that Carotte Touchon had the highest root production (11.6 t ha−1) with 20 t ha−1 of manure, followed by 7.5 t ha−1 at 10 t ha−1, while Touchon Mega had the lowest root yield (1.4 t ha−1) in the control group. Proximate quality of carrots was mostly unaffected by the varieties, except for fat content. The study found significant variations in vitamins A, C, and E, phytochemicals (phytate, tannins, and oxalate), and minerals (Fe, Mg, Na, and K) among the varieties, although no impact on Zn and Ca was observed. This research suggests that carrots have substantial growth potential in south-eastern Nigeria, offering a solution to vitamin and mineral deficiencies prevalent in this area. Additionally, Carotte Touchon with either 20 t ha−1 or 10 t ha−1 of poultry manure is recommended for optimal carrot cultivation in this region.

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Potential influence of nitrogen fertilizer rates on yield and yield components of carrot (Dacus carota L.) in Ethiopia: Systematic review

Gelaye,

Getahun

2024

Open Agriculture

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Carrot is a significant root crop in Ethiopia but its production faces challenges such as nutrient loss and unfavorable growth conditions, which hinder its productivity. The objective of this review was to evaluate the impact of nitrogen fertilizer rates on carrot yield in Ethiopia. A systematic review using databases like PubMed and Scopus focused on peer-reviewed, English-language studies with quantitative data on nitrogen fertilizer and carrot yield in Ethiopia, excluding non-peer-reviewed articles and those lacking quantitative data or in other languages. Globally, carrot yields are 30–100 tons per hectare, but only 5.5 tons in Ethiopia. Carrots are rich in vitamins A, C, and B, proteins, minerals, and fiber, with vitamin C boosting immunity and aiding in wound healing and allergy management. Meanwhile, vitamin A plays a crucial role in vision, bone growth, immune function, and reproduction. It is a rich source of carotenoids and anthocyanins. The application of nitrogen fertilizer significantly improved carrot yield (root length, fresh weight, and dry weight). In Ethiopia, the use of nitrogen fertilizer affects the marketability and total yield of carrots, with small-scale farmers employing diverse rates for cultivation. Current recommendations suggest 69 kg/ha of phosphorus (P2O5) and 46 kg/ha of nitrogen, but farmers often do not follow these guidelines. In conclusion, optimizing nitrogen fertilizer usage is crucial for enhancing carrot yields among small farmers, underscoring the need for government support to tailor recommendations to local soil conditions and boost productivity.

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Influences of spacing on yield and root size of carrot (Daucus carotaL.) under ridge-furrow production

Cited by 6 publications

References 18 publications

Effect of Plant Density on Growth and Bioactive Compounds in Salvia miltiorrhiza

Effect of Plant Density on Growth and Bioactive Compounds in Salvia miltiorrhiza

Response of Carrots (Daucus carota) on the Growth, Yield, and Nutritional Composition to Varying Poultry Manure Rates

Potential influence of nitrogen fertilizer rates on yield and yield components of carrot (Dacus carota L.) in Ethiopia: Systematic review

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