Produção de mudas de cebola sob adubação orgânica

Abstract

With the objective to produce seedlings of onion in a process of transition of the system of conventional production for the organic one, under a agroecological approach; e still to quantify the potential of vermicompost bovine, manure of corral and the foliar fertilization in the production of onion seedlings, was lead the experiment the field in the Fundação Estadual de Pesquisa Agropecuária - FEPAGRO/SUL, Rio Grande/RS, in 2005 in the period of May/24 to August/11. It was used to cultivate ‘Petroline’ (average cycle), submitted to the following treatments: T1 - 45 Mg ha-1 of bovine manure vermicompost (VB); T2 - 45 Mg ha-1 of bovine manure vermicompost (VB) + “Super Magro” + cow piss + Calda bordalesa (SM + UV + CB); T3 - 15Mg ha-1 of bovine manure vermicompost (VB); T4 - 15Mg ha-1 of bovine manure vermicompost (VB) + “Super Magro” + cow piss + Calda bordalesa (SM + UV + CB); T5 - 60Mg ha-1 of manure bovine of corral (EC); T6 - 60Mg ha-1 of manure bovine of corral (EC) + “Super Magro” + cow piss + Calda bordalesa (SM + UV + CB), T7 - 30 Mg ha-1 of manure bovine of corral (EC), T7 - 30 Mg ha-1 of manure bovine of corral (EC) + “Super Magro” + cow piss + Calda bordalesa (SM + UV + CB), T8 - 30 Mg ha-1 of manure bovine of corral (EC) and T8 - 30 Mg ha -1 of manure bovine of corral (EC) + “Super Magro” + cow piss + Calda bordalesa (SM + UV + CB). The experiment was developed in randomized blocks with eight treatments and four repetitions. The variables analyzed were: aboveground biomass (dry and wet) and fitomass (dry and wet) roots, height of seedlings, diameter of the col and length of root. It was concluded: The application of 60 Mg ha-1 of manure bovine of corral more the foliar fertilization (cow piss 0.5% + “Super Magro” 5% + Calda bordalesa 1%) promotes positive answers for the variable aboveground fitomass dries and diameter of the col. The sprayings with bio-fertilizers (cow piss 0.5% + “Super Magro” 5% + Calda bordalesa 1%) develop aboveground fitomass dries and wet of the seedlings onion. The sprayings with bio-fertilizers (cow piss 0.5% + “Super Magro” 5% + Calda bordalesa 1%) affect the roots of seedlings onion. The production of seedlings onion is possible uniting fertilization of base (manure bovine of corral, bovine manure vermicompost) and bio-fertilizers (cow piss 0.5% + “Super Magro” 5% + Calda bordalesa 1%).