COMPARATIVE STUDY ON MINERAL CONTENT OF ORGANIC AND CONVENTIONAL CARROT, CELERY AND RED BEET JUICES
Iwona Domagała-Świątkiewicz
Agricultural University in KrakówMaciej Gąstoł
Agricultural University in KrakówAbstract
The consumption of organic food has been growing all over the world. Clean soil environment and extensive methods of production make Poland particularly suitable for developing organic forms of farming. The nutritional quality of food grown by organic and conventional methods is the subject of much controversy. The nutritious quality of organic products is the subject of numerous scientific research. The study conducted in 2009 presents comparison of some nutritional values of juices made from organic and conventionally grown vegetables (carrot, red beet, celery). For the experiment 39 vegetable fields located in the south and east of Poland were chosen. All organic farms were certified according to UE Council Regulation no. 2092/91 and obtained valid certificates. Unclarified juices were obtained with cold press juicer. After microwave mineralization in HNO3 the following nutrient elements were measured: P, K, Mg, Ca, S, Fe, Zn, Mn, Cu, B as well as Na, Cd, Pb, and Ni. Moreover, ammonium N and nitrates content were evaluated using FIA method. Celery juices were the richest in P, K, Mg, Ca, Fe, Zn, B and
heavy metals Cd, and Pb, while carrot juices were having the highest level of S and Na. Cultivation methods significantly differentiated Ca, Mg and Na content. Generally, the conventional farming method favored higher accumulation of N-NO3 (only in carrot), Mg and Na, whereas the higher Ca amounts were measured for bio juices. Significantly higher N-NH4 amounts were observed for all conventionally vegetable juices than for organic. Higher levels of Cd were found for conventional juices made from carrot and beet, however in the celery juice the values differences were not significant.
Keywords:
organic farming, nutritional value, vegetable juices, nitrates, macro- and microelementsReferences
Amarante C.V.T., Steffens C.A., Mafra A.L., Albuquerque J.A., 2008. Yield and fruit quality of apple from conventional and organic production systems. Pesq. Agropec. Bras., Brasilia, 43, 333–340.
Basta N.T., Ryan J.A., Chaney R.L., 2005. Trace element Chemistry in Residual-Treated Soil: Key Concepts and Metal Bioavailability. J. Environ. Qual. 34, 49–63.
Benbrook C., Xin Z., Yanez J., Davie N., Andrews P., 2008. New evidence confirms the nutritional superiority of plant-based organic foods. An Organic Center State of Science Review. Available from: http://www.organic-center.org (accessed 15.04.2010).
Bonti-Ankomah S., Yiridoe E., 2006. Organic and Conventional Food: A Literature Review of the Economics of Consumer Perceptions and Preferences. Organic Agriculture Centre of Canada Nova Scotia Agricultural College.
Bourn D., Prescott J., 2002. A comparison of the nutritional value, sensory qualities, and food safety of organically and conventionally produced foods. Crit. Rev. Food Sci. Nutr. 42, 1–34.
Caswell J.A., 2000. Valuing the benefits and costs of improved food safety and nutrition. Aust. J. Agr. Resour. Ec. 42(4), 409–424.
Dangour A., Dodhia S.K., Hayter A., Allen E., Lock K., Uauy R., 2009. Nutritional quality of organic foods: a systematic review. Am. J. Clin. Nutr. 90, 680-685.
David C., 1998. Research in arable farming system in Europe. Research Methodologies in Organic Farming.
Domagała-Świątkiewcz I., 2005. Effect of the soils properties on the potassium nutrient status of the apple tree. Fertilizers and Fertilization 3, 465–480.
Eriksen J., 2005. Gross sulphur mineralization-immobilization turnover in soil amended with plant residues. Soil Biol. Biochem. 37, 2216–2224.
Györéné K.G., Varga A., Lugasi A., 2006. A comparison of chemical composition and nutritional value of organically and conventionally grown plant derived foods. Orv. Hetil. 147, 2081–90.
Heaton S., 2001. Organic farming, food quality and human health. A review of the evidence. www.soilassociation.org.
Heaton S., 2002. Assessing Organic Food Quality: Is it better for you? UK Organic Research 2002: Proceedings of the COR Conference. 26–28th March.
Hildermann I., Messmer M., Dubois D., Boller T., Wiemken A., Mader P., 2010. Nutrient use efficiency and arbuscular mycorrhizal root colonisation of winter wheat cultivars in different farming systems of the DOK long-term trial, J. Sci. Food Agr., 90, 2027–2038.
Hornick S.B., 1992. Factors affecting the nutritional quality of crops. Am. J. Alternative Agr. 7(1 and 2), 63–68.
Kabata-Pendias A., Pendias H., 1999. Biogeochemia pierwiastków śladowych. PWN, Warszawa.
Kopp H.J., 1992. Research on organically versus conventionally grown vegetables. Proc. 9th IFOAM Conf., 16 Nov. 1992, Sao Paulo, Brasil, 324–330.
Kucińska K., Pelc I., Golba J., 2008. Review of perspective of organic agriculture development in Poland determinate by consumer demands. Agron. Res. 6, 47–53.
Lairon D., 2010. Nutritional quality and safety of organic food. A review. Agron. Sustain. Dev. 30, 33–41.
Lammerts van Bueren E.T., Jones S.S., Tamm L., Murphy K.M., Myers J.R., Leifert C., Messmer M.M., 2010. The need to breed crop varieties suitable for organic farming, using wheat, tomato and broccoli as examples: A review. Wageningen J. Life Sci. 58, 3-4, 193–205.
Lampkin N., 1990. Organic Farming Press, UK.
Leclerc J., Miller M.L., Joliet E., Rocquelin G., 1991. Vitamin and mineral contents of carrots and celeriac grown under mineral and organic fertilization. Biol. Agric. Hort. 7, 339–348.
Lemaire G., Jeuffroy M.H., Gastal F., 2008.Diagnosis tool for plant crop N status in vegetative stage. Theory and practices for crop N management. Eur. J. Agron., 28, 614–624.
Mader P., Pfiffner L., Niggli U., Velimirov A., Boltzmann L., Balzer U., Balzer F., Besson J.M., 1993. Effect of three farming systems (bio-dynamic, bio-organic, conventional) on yield and quality of beetroot (Beta vulgaris L. var. esculenta L.) in a seven year crop rotation. Acta Hort. 339.
Pasławski P., Migaszewski Z.M., 2006 The quality of element determinations in plant materials by instrumental methods. Polish. J. Environ. Stud. 15, 154–164.
PN-A-75112: 1992. Owoce, warzywa i ich przetwory – Oznaczanie zawartości azotynów i azotanów. Polski Komitet Normalizacyjny, Warszawa.
PN-EN 12147:2000. Soki owocowe i warzywne – Oznaczanie kwasowości miareczkowej. Polski Komitet Normalizacyjny, Warszawa.
PN-EN ISO 13395:2001. Jakość wody – Oznaczanie azotu azotynowego i azotanowego oraz ich sumy metodą analizy przepływowej (CFA i FIA) z detekcją spektrometryczną.
Rembiałkowska E., 2000a. The nutritive and sensory quality of carrots and white cabbage from organic and conventional farms. Proc.13th IFOAM Sci. Conf. 28–31 August, Zurich, 297.
Rembiałkowska E., 2000b. Zdrowotna i sensoryczna jakość ziemniaków oraz wybranych warzyw z gospodarstw ekologicznych. Fundacja Rozwój SGGW, Warszawa.
Rembiałkowska E., 2003. Organic farming as a system to provide better vegetable quality. Proc. Int. Conf. Quality in Chains 6–9 July, Wageningen, The Netherlands. Acta Hort 604, 473–477.
Rembiałkowska E., Czerwiecki L., Wilczyńska G., Soszyńska A., 2001. The nutritive quality of the plant crops bought in the shops with organic and conventional food. Proc. 13th IGWT Slovenia 2–8 September.
Schuphan W., 1974. Nutritional value of crops as influenced by organic and inorganic fertilizer treatments – Qualitas Plantarum. Pl. Fds. Hum. Nutr. XIII, 4, 333–358.
Weibel F.P., Bickel R., Leuthold, S., Alföldi T., 2000. Are organically grown apples tastier and healthier? A comparative field study using conventional and alternative methods to measure fruit quality. Acta Hort. 517, 417–426.
Winter C.K, Davis S.F., 2006. Organic food. J. Food Sci., 71, 117–124.
Woese K., Lange D., Boess C., Bögl K.W., 1997. A comparison of organically and conventionally grown foods – results of a review of the relevant literature. J. Sci. Food Agric. 74, 281–293.
Worthington V., 2001. Nutritional quality of organic versus conventional fruits, vegetables, and grains. J. Alter. Compl. Med. 7, 161–173.
Agricultural University in Kraków
Agricultural University in Kraków
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