Efeito residual da adubação orgânica e mineral no estabelecimento de mudas de pau rosa

Abstract

The objective of this work was to evaluate the residual effect of fertilization in a second crop in the formulation of substrates in the development of A. rosaeodora seedlings, as well as to analyze the chemical properties of the components of the substrates. The study was carried out in a greenhouse in a completely randomized design with 8 treatments and 10 replications. Biometric variables were evaluated every 30 days for 180 days and soil chemical attributes at the end of the experiment. The results showed that, in the chemical properties, in the initial and final time, the combinations of chicken litter + biochar and chicken litter + biochar + NPK, were the ones that presented the best results. In the results, the combinations of chicken litter + biochar, showed the highest replacement for N and K, while the combination of chicken litter + biochar + NPK, showed greater replacement of Ca, Mg and P. Among the biometric characteristics evaluated, the variables height of plant and shoot dry matter showed significant differences between treatments, where seedlings from T8 (poultry litter + biochar and chicken litter + NPK) showed greater growth compared to seedlings from T1 (without fertilization). As for the lack of response for the other biometric parameters evaluated, it may be associated with the fact that the species Aniba rosaeodora is a native plant from the Amazon, adapted to the poor soil conditions of the region, in addition to not having defined characteristics, due to the great genetic variability of the species.