Biofertilizantes na produção de alface

• Autor(a) principal: Sampaio, Biágio Sartori
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/5196
• topic: Sustainability; Organic fertilization; Lactuca sativa L.; Adubação orgância; Agronomia; Alface; Sustentabilidade; Agricultura orgânica; Biofertilizantes; Fertilizantes orgânicos; 63

Among the leafy lettuce stands out among the most commonly consumed by Brazilians, so no need to seek alternatives to produce it using more sustainable technologies. Many producers who grow lettuce in organic systems already use biofertilizers with satisfactory results. However, for confirmation and understanding of its effects needs further deepening scientific. The objective of this research was to evaluate the effect of different types of biofertilizers on yield and nutrition of lettuce Baba de Verão in organic production system. The experiment was conducted under field conditions in Havana farm, Montanha city, Espírito Santo. Were implanted 02 experiments: the first, a randomized block with four replications, testing six concentrations of biofertilizer cow urine diluted in water (0, 5, 10, 15, 20 and 25%), according to experimental testing, conducted in a 2x5 factorial arrangement were tested soil inoculation with Efficient Microorganisms (EM) and different biofertilizers foliar applied. Upon reaching the commercial harvest, evaluated the diameter of the shoot (DPA), number of leaves per plant (NF), the fresh matter (MFPA), fresh and dry matter of leaves (MFF and MSF) and nutrient concentration in the leaves. In experiment 01, the levels of cow urine and significant quadratic effect for the characteristics of the shoot diameter, number of leaves per plant, fresh weight of shoot fresh and dry weights of leaves and leaf N content. The nutrient content were within the range considered adequate for lettuce, with the exception of the elements P, Ca, S, Fe and Cu. It is recommended that the concentration of 11.36% of biofertilizer cow urine to an estimated maximum yield per plant in 218.05 g of commercial lettuce, corresponding to yield of 34.9 t. ha-1. Already in experiment 02, the highest average for FMAP, 175.92 g. per plant, which corresponds to an estimated yield of 28.14 t. ha-1. Regarding nutritional status, there was no positive effect of applying biofertilizers for the K and Ca compared to standard, however the levels of Cu were better in the interaction between standard and soil inoculation.