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2013, vol. 14, iss. 4, pp. 541-547
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Effect of variety and production methods on nitrate content in lettuce
Uticaj sorte i načina proizvodnje na sadržaj nitrata u salati
Abstract
Certain trials, the effect of variety and different production methods on the content of damaging substances i.e. nitrate in lettuce leaf were carried out on the experimental field of the Faculty of Agriculture in East Sarajevo during the period of three years. The trial was set in a randomized block-system with three replications and the plot size of 2.4 m2 (0.3x8m). Three lettuce varieties (Archimeds RZ, Santoro RZ, Kibou RZ) were analyzed in the trial. Each row of variety was tested in the following variants of covering: planting on soil that was not covered, mulching with PE-black folium before planting; agro-textile-covering of plants with agro textile (17gr) after planting; combination of mulching + agro textile. The three-year researches have shown that the production method and variety significantly affect the nitrate content. An average nitrate content was 2196.33 mg/kg on the control variant, and 2526.24 mg/kg on agro textile. Leafy lettuce of oak leaf type "Kibou" had lower nitrate content (2176.85 mg/kg) compared to "Archimed" (2843.05 mg/kg) and "Santoro" (2221.37 mg/kg).
Sažetak
Na oglednom polju Poljoprivrednog fakulteta Istočno Sarajevo u trogodišnjem periodu izvršena su ogledna istraživanja, uticaj sorte i različitih načina proizvodnje na sadržaj štetnih materija tj.nitrata u listu salate. Ogled je postavljen po slučajnom blok sistemu u četiri ponavljanja sa veličinom ogledne parcele od 2,4m2 (0,3x8m). U ogledu su bile zastupljene tri sorte salate (Archimeds RZ, Santoro RZ, Kibou RZ) . Svaki red sorte je bio podvrgnut sljedećim varijantama pokrivanja: kontrola-sadnja na nepokrivenom zemljištu; malčovanje pred sadnju sa PE-crnom folijom; agrotekstilpokrivanje biljaka nakon sadnje agrotekstilom (17 grama); kombinacija malčovanje + agrotekstila. Trogodišnja istraživanja su pokazala da način proizvodnje i sorta značajno utiče na sadržaj nitrata. Prosječan sadržaj nitrata na kontrolnoj varijanti iznosio je 2196,33 mg/kg, a na agrotekstilu 2526,24 mg/kg .Lisnata salata u tipu hrastovog lista "Kibou" imala je manji sadržaj nitrata (2176,85 mg/kg) u odnosu na "Archimed" (2843,05 mg/kg) i "Santoro" (2221,37 mg/kg).
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References
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Balalić, I. (2004) Influence of method of production and substrates on yield and quality of lettuce (Lactuca sativa L.). Novi Sad: Faculty of Agriculture, Master thesis
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