Effect of cultivar and harvest date of kale [Brassica oleracea L. var. acephala] on content of nitrogen compounds

• Autorzy: Korus A , Lisiewska Z.
• Języki publikacji: EN

Abstrakty

EN

The level of total nitrogen, protein nitrogen, nitrates (NO₃⁻) and nitrites (NO₂⁻) was measured in the leaves of kale of the cultivars Winterbor F₁, Redbor F₁ and Średnio Wysoki Zielony Kędzierzawy. The investigation was carried out in two successive years, the raw material being harvested three times each year, i.e. 10, 14 and 18 weeks after planting seedlings in the field. Depending on the year of the investigation, the cultivar and the date of harvest, the content found in 100 g fresh matter of kale was: 0.54-0.74 g total nitrogen and 0.46-0.50 g protein nitrogen; in 1000 g the content of nitrates (NO₃⁻) was 248-2810 mg and of nitrites (NO₂⁻) 0.14-0.95 mg. In both years the highest content of total nitrogen was found in leaves of Średnio Wysoki Zielony Kędzierzawy and of protein nitrogen in Winterbor F₁. The cultivar Redbor F₁ was characterized by the highest content of nitrates and nitrites. Comparing material from the three harvest dates, average values for the year and cultivar showed that the second harvest contained 9% more total nitrogen and 4% more protein nitrogen than the first, while the third harvest contained, respectively, 17% and 8% more than the first. Nitrate content fell by 67% and 83%, respectively, and nitrite increased by 5% (but later was reduced by 46%). Nitrate and nitrite are regulated in spinach and lettuce and for this reason understanding the accumulation of these compounds is critical if regulations are developed for kale.

Słowa kluczowe

EN

kale; Brassica oleracea var.acephala; plant cultivar; harvest date; nitrogen compound; nitrogen content; nitrate; nitrite; protein nitrogen; total nitrogen

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2009
• Tom: 18
• Numer: 2
• Opis fizyczny: p.235-241,ref.

Twórcy

autor

Korus A

• Agricultural University of Krakow, Balicka 122, 30-149 Krakow, Poland

autor

Lisiewska Z.

Bibliografia

• 1. D’ANTUONO L.F., NERI R. Traditional crop revised: yield and quality of palm-tree kale, grown as a mechanised industrial crop, as a function of cutting height. Acta Hort. 598, 123, 2003.
• 2. PHUPAIBUL P., CHINOIM N., MATOH T. Nitrate concentration in Chinese kale sold at markets around Bangkok, Thailand. Thai J. Agric. Sci. 35, 295, 2002.
• 3. HOCHMUTH G.J., BRECHT J.K., BASSETT M.J. Nitrogen fertilization to maximize carrot yield and quality on a sandy soil. HortSci. 34, 641, 1999.
• 4. MOZOLEWSKI W., SMOCZYŃSKI S. Effect of Culinary Processes on the Content of Nitrates and Nitrites in Potatoe. Pakistan J. Nutr. 3, 357, 2004.
• 5. DELGHINGARO-AUGUSTO V., FERREIRA F., BORDIN S., COREZOLA do AMARAL M.E., TOYAMA M.H., BOSCHERO A.C., CARNEIRO E.M. A low protein diet alters gene expression in rat pancreatic islets. J. Nutr. 134, 321, 2004.
• 6. REEDS P.J., GARLIC P.J. Protein and amino acid requirements and the composition of complementary foods. J. Nutr. 133, 2953S, 2003.
• 7. ANDERSON G.H., MOORE S.E. Dietary proteins in the regulation of food intake and body weight in humans. J.Nutr. 134, 974S, 2004.
• 8. REPORTS OF THE SCIENTIFIC COMMITTEE FOR FOOD. Opinions of the scientific committee for food on: nitrates and nitrite, European Commission, thirty-eighth series, Luxembourg, 1997.
• 9. GUADAGNIN S.G., RATH S., REYES F.G.R. Evaluation of the nitrate content in leaf vegetables produced through different agricultural systems. Food Addit. Contam. 22, 1203, 2005.
• 10. HUARTE-MENDICOA J.C., ASTIASARAN I., BELLO J. Nitrate and nitrite levels in fresh and frozen broccoli. Effect of freezing and cooking. Food Chem. 58, 39, 1997.
• 11. Kim B.Y., Yoon S. Analysis of nitrate contents of Korean common foods. J.Korean Soc. Food Sci. Nutr. 32, 779, 2003.
• 12. WHO. Safety evaluation of certain food additives. Fiftyninth Report of the Joint FAO/WHO Committee on Food Additives. Food Additives Series No. 50, Geneva: WHO, 2003.
• 13. LEFSRUD M.G, KOPSELL D.A., KOPSELL D.E. Nitrogen levels influence biomass, element al accumulations, and pigment concentrations in spinach. J.Plant Nutr. 30, 171, 2007.
• 14. ABO-BAKR T.M., EL-IRAQUI S.M., HUISSEN, M.H. Nitrate and nitrite contents of some fresh and processed Egyptian vegetables. Food Chem. 19, 265, 1986.
• 15. FUJIHARA S., KASUGA A., AOYAGI Y. Nitrogen - to - protein conversion factors for common vegetables. J.Food Sci. 66, 412, 2001.
• 16. GĘBCZYŃSKI P., KMIECIK W., LISIEWSKA Z. Effect of harvest time, freezing, and storage of frozen chard on nitrate and nitrite content. Bromat. Chem. Toksykol. 32, 81, 1999 [In Polish].
• 17. JAWORSKA G., KMIECIK W. Content of selected mineral compounds, nitrates III and V, and oxalates in spinach (Spinacia oleracea L.) and New Zealand spinach (Tetragonia expansa Murr.) from spring and autumn growing seasons. Elec. J. Pol. Agric.Univ. s. Food Sci. Technol. 1999. (available at: http://www.ejpau.media.pl/series/volume2/issue2/ food/art- 03.html).
• 18. KMIECIK W., GĘBCZYŃSKI P. KORUS A. Effect of variety, type of the usable part and the growing period on the content of nitrates, nitrites and oxalates in dill. (Anethum graveolens). Bromat. Chem. Toksykol. 34, 213, 2001 [In Polish].
• 19. CHWEYA J.A. Contents of nitrate-n and thiocyanate ions in kale (Brassica oleracea var. acephala. DC) leaves from kalegrowing areas in Kenya. XII African Symposium on Horticultural Crops, ISHS Acta Hort. 218, 1988.
• 20. AOAC. Official Methods of Analysis of Association of Official Analytical Chemists. 14th ed. Arlington, VA, USA, 1984.
• 21. AWOLUMATE E.O. Accumulation and quality of storage protein in developing cowpea, mung bean and soya bean seeds. J. Sci. Food Agric. 34, 1351, 1983.
• 22. ISO/6635-2. Fruits, vegetables and derived products - Determination of nitrite and nitrate content. Molecular absorption spectrometric method. International Organization for Standardization, Case Postale 56, CH-1211, Geneve 20, Switzerland, 1984.
• 23. JAWORSKA G., SŁUPSKI J. The value of New Zealand spinach for freezing. Żywność, 2, 92, 2001 [In Polish].
• 24. WILLS R.B.H., LIM, J.S.K., GREENFIELD H. Composition of Australian foods 32. Leafy, stem and other vegetables. Food Technol. Austr. 38, 416, 1986.
• 25. WILLS R.B.H. Composition of Australian fresh fruit and vegetables. Food Technol. Austr. 39, 523, 1987.
• 26. GĘBCZYŃSKI P. Contents of selected nitrogenous substances in the fresh and frozen Brussels sprouts. Acta Sci. Pol. s. Technol. Alim., 1, 27, 2002 [In Polish].
• 27. ALMEIDA D., ROSA E. Protein and mineral concentration of portuguese kale (Brassica oleracea var. acephala) related to soil composition. Acta Hort. 407, 269, 1996.
• 28. MARIOTTI F., TOME D., MIRAND P.P. Converting nitrogen into protein – beyond 6.25 and Jones’ factors. Crit. Rev. Food Sci. Nutr. 48, 177, 2008.
• 29. European Commission Regulation 1822/2005/EC, of 8 November 2005, setting maximum levels for certain contaminants in foodstuffs. Off. J. Eur. Comm. 2005. (available at: http://europa.edu.int ).
• 30. AMR A., HADIDI N. 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. J. Food Comp. Anal. 14, 59, 2001.
• 31. ROŻEK S. Factors influence the nitrate levels in vegetable crops. Zesz. Nauk. AR Krakow 364, 19, 2000 [In Polish].
• 32. BEIS G.H., SIMONS A.S., DOGRAS C.C. Spinach composition as affected by leaf age and plant part. Acta Hort. 579, 653, 2002.
• 33. LISIEWSKA Z. KMIECIK W. Nitrate and nitrite in vegetables. Part II. Changes of the levels of nitrates and nitrites in vegetables during short and long-lasting storage. Postępy Nauk Rol. 3, 25, 1991b [In Polish].
• 34. PRUGAR J. Zmeny obsahu dusicnanu a dusitanu pri skladovani rostlinnych produktu. Rostlinna Vyroba, 39, 1155, 1993.
• 35. LISIEWSKA Z., KMIECIK W. Nitrate and nitrite in vegetables. Part I. Effect of some factors on the levels of nitrates and nitrites in raw vegetables. Postępy Nauk Rol. 3, 11, 1991a [In Polish].
• 36. KOMOSA A., BREŚ W., GOLCZ A., KOZIK E., TYKSIŃSKI W. Nitrate and nitrite contents in vegetables grown in Poznań area. Prace Kom. Nauk Rol. i Kom.Nauk Leś. 75, 91, 1993 [In Polish].
• 37. LISIEWSKA Z., KMIECIK W. Effect of freezing and storage on quality factors in Hamburg and leafy parsley. Food Chem. 60, 633, 1997.