Fertilizante de liberação lenta no desenvolvimento de mudas de Eucalyptus grandis

Abstract

One of the most important actions to increase production of seedlings is substrate fertilization. The use of slow release fertilizer (FLL) can contribute to the achievement of best seedlings. The aim of this research was to evaluate increasing doses of FLL and FC, as well as compare these fertilizers in developing seedlings of Eucalyptus grandis. The study was conducted in Vale do Itajai, Santa Catarina State. The treatments were the addition of FLL and HR in each experiment in the following doses: T1-0 kg (control), T2-2 kg; T3-4 kg, T4-6 kg; T5-8 kg and T6-10 kg.m -3 of base substrate. After 174 days of sowing, the variables analyzed were total height, stem diameter, fresh weight of shoot, shoot dry biomass, root dry weight, total biomass and maximum dose of technical efficiency, and nutrient levels of the seedlings of each treatment. In all treatments there was positive response in seedling development, however, the plants had better growth in doses ranging from 9.1 to 12.9 kg.m -3 of slow release fertilizer.