EFFECTS OF MINERAL NUTRITION AND BIOFERTILIZATION ON LETTUCE PRODUCTION UNDER CONVENTIONAL AND SOILLESS CULTURE
Achieving a sustainable horticulture outlines a rational use of fertilizers to minimize degradation of soils and contamination of aquifer, developing technologies and alternative nutritional plans. Lettuce is the most important leaf vegetable; its culture and production are affected by handling systems and fertilization type used. In North Argentina there is no sufficient experience and systematized information on lettuce cultivation without soils and with different nutrition. The work aimed to assess effects of mineral nutrition and biofertilization on yield and quality of lettuce in conventional crop -soil- and -soilless culture- on vertical sleeves. One worked on field, greenhouse and laboratory Chair of Horticulture, Finca El Manantial, Piedmont of Tucumán (northwest Argentina). Lettuce type cutsheet was used, with experimental design BCA -4 treatments with 5 repetitions-: T1 conventional system -soil-; T2 system soilless culture -conventional nutrition- vertical sleeves; T3 system soil - biofertilizers and T4 system soilless culture -vertical sleeves- biofertilizers. With ANOVA and Tukey Test (program Statistix), number of leaf (NL), leaf area (LA), size (scale), length and stem diameter and fresh weight (FW) of plants was evaluated in three moments of the crop. FW plants showed significant differences between treatments: T1 (124.5); T2 (212.5); T3 (166.5) for T4 (330.2). Meanwhile, in the three time points NL, LA, size and length and stem diameter also showed statistical differences between treatments tested. The results showed that the conventional system -soil- was passed by the soilless culture in the parameters evaluated. The adaptation of this vegetable to alternative management systems is a sustainable tool for which further research is needed to adjust the system without local soil and achieve levels of fertilization for the correct use of this technology, reducing negative effects on the environment.
Villagra, E.L., Minervini, M.G., Brandán , E.Z. and Fernández, R.R. (2012). EFFECTS OF MINERAL NUTRITION AND BIOFERTILIZATION ON LETTUCE PRODUCTION UNDER CONVENTIONAL AND SOILLESS CULTURE . Acta Hortic. 947, 395-400
Lactuca sativa L., fertilization, column system