Effect of Cultivar and Harvest Date on Nitrate (NO3) and Nitrite (NO2) Content of Selected Vegetables Grown Under Open Field and Greenhouse Conditions in Jordan

Amr, Ayed; Hadidi, Nazir

doi:10.1006/jfca.2000.0950

Cited by 90 publications

(62 citation statements)

References 12 publications

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“…Consumption of vegetables is believed as a major source of nitrates for human population. Factors affecting nitrates accumulation in plants, including fertilization, environmental conditions and harvest date, are widely investigated (Drlik & Rogl 1992, Mazur 1992, Fytianos & Zarogiannis 1999, Gutezeit 1999, Gutezeit & Fink 1999, Gutezeit 2000, Amr & Hadidi 2001, Wawrzyniak et al 2004, Santamaria 2005, Kona 2006, Ayaz et al 2007). There were found big differences between nitrates accumulation in different vegetable species.…”

Section: Introductionmentioning

confidence: 99%

Quality of Carrots Grown for Processing as Affected by Nitrogen Fertilization and Harvest Term

Gajewski

Węglarz

Середа³

et al. 2009

Journal of Fruit and Ornamental Plant Research

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SummaryIn 2007-2008 the effect of nitrogen fertilization and harvest term on quality of two carrot cultivars was investigated. The field experiment was carried out in Żelazna Experimental Station of Warsaw University of Life Sciences. Karotan F 1 and Trafford F 1 cultivars, commonly grown for juice industry, were the objects of the experiment. Carrot seeds were sown at the beginning of May. Nitrogen fertilization was applied in five rates, ranged from 0 to 120 kg·ha -1 and in two terms -before sowing and in the middle of growing season. Roots were harvested in three terms: mid-September, mid-October and the first decade of November. After harvest there were determined: nitrates (NO 3 ) content in carrot roots and juice, soluble solids, colour parameters of juice in CIE L*a*b* system. The dose and the term of nitrogen fertilization influenced nitrates content in carrots, and the highest NO 3 concentration was found in carrots fertilized with 120 kg·ha -1 of N before sowing. Karotan showed higher nitrates accumulation than Trafford. The content of nitrates in the roots was markedly higher than in carrot juice. Nitrates content in carrots decreased with delaying of harvest time, in opposite to soluble solids content. Soluble solids content and colour parameters of carrot juice were not affected by nitrogen fertilization, but the lowest L*, a* and b* values were observed at the last term of harvest.

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Section: Introductionmentioning

confidence: 99%

Quality of Carrots Grown for Processing as Affected by Nitrogen Fertilization and Harvest Term

Gajewski

Węglarz

Середа³

et al. 2009

Journal of Fruit and Ornamental Plant Research

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“…In an experiment with kale Korus and Lisiewska (2009) found that the compared cultivars differed significantly in their nitrates' content. However, Amr and Hadidi (2001) in an experiment with two cultivars each of squash, cucumber, and tomatoes grown in polypropylene-covered greenhouses found that cultivar had a significant effect only on the nitrates content of tomatoes and squash. Conversely, Behr and Wiebe (1992) stated that the nitrates content of butter head lettuce (highly susceptible to 0.998*** * = significant at 5%; ** = significant at 1%; *** = significant at 0.1% nitrates accumulation) depends on the highly different nitrates uptake of the cultivar.…”

Section: Cucumber Fruits Qualitymentioning

confidence: 95%

“…Various studies have reported the nitrates content of cucumbers resulted from field crops (Mahmoud et al, 2009), protected crops (Ruiz and Romero, 2002;Tamme et al, 2010), different growing seasons (Tamme et al, 2010), different time of harvest (Amr and Hadidi, 2001) and domestic or import supply (Tamme et al, 2010).…”

Section: Cucumber Fruits Qualitymentioning

confidence: 99%

Phosphorus, Potassium and Nitrate Contents in Fruit of Pickling Cucumbers Grown in a High Tunnel

Neaţă

Hoza

Teodorescu

et al. 2016

Not Bot Horti Agrobo

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Pickling cucumbers are highly important both for fresh consumption and for canning industry. This study aimed to compare differences in yield and quality of eight pickling cucumber cultivars, including 'Cor 12004', 'IGG 2010', 'IGG 2020', 'SM 5322', 'SM 5323', 'Zayin 201', 'Zayin 175201' and 'Trilogy'. The cucumber cultivars were laid out in a high tunnel crop and evaluated for vegetative traits (i.e. vine length, nodes per vine and branches per vine), yield attributes (i.e. fruits per main stem, average weight of fruit and fruits weight per plant) and fruits quality components (nitrate, phosphate and potassium mg kg -1 ). The results showed significant differences (P<0.05) in vegetative traits and yield attributes among cultivars. The analysis of correlation coefficients revealed that total yield (kg ha -1 ) was positively correlated with two out of three vegetative traits (with exception nodes per plant) and with all yield attributes. The highest total yield (101.17 t ha -1 ) was reached by 'SM 5322' cultivar, followed by the 'IGG 2010' and 'SM 5323' cultivars. The nitrates content in fruits, assessed on three categories of length (6-9 cm, 9-12 cm and >12 cm), revealed a declining value with increase in the cucumber length. The study findings suggest that irrespective of the cultivar, the amount of nitrate was higher in shorter cucumbers (6-9 cm length) although all recorded values (between 192.7 and 364.3 mg kg -1 fresh matter) being under maximum accepted limit concentrations. The amount of phosphate was higher in medium to long cucumbers, while the amount of potassium was higher in shorter cucumbers.

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“…2 Low intensity of sunlight is believed to increase tuber nitrate accumulation by discouraging the activity of nitrate reductase. 3 The reason for the increasing attention toward potato nitrate content is mainly due to the large amounts consumed which can contribute greatly to the daily intake of nitrate in diet. 4,5 In off-season crops, tubers are harvested before their full 'ripening' at a more or less advanced growth stage.…”

Section: Introductionmentioning

confidence: 99%

Tuber yield and quality characteristics of potatoes for off-season crops in a Mediterranean environment

Ierna

2009

J. Sci. Food Agric.

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Effect of Cultivar and Harvest Date on Nitrate (NO3) and Nitrite (NO2) Content of Selected Vegetables Grown Under Open Field and Greenhouse Conditions in Jordan

Cited by 90 publications

References 12 publications

Quality of Carrots Grown for Processing as Affected by Nitrogen Fertilization and Harvest Term

Quality of Carrots Grown for Processing as Affected by Nitrogen Fertilization and Harvest Term

Phosphorus, Potassium and Nitrate Contents in Fruit of Pickling Cucumbers Grown in a High Tunnel

Tuber yield and quality characteristics of potatoes for off-season crops in a Mediterranean environment

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