Análise residual de adubação orgânica nas características química e física do solo sob plantas de noni

Abstract

The use of organic fertilizers in the soil enables the improvement of its fertility and a positive change in the population of microorganisms, avoinding the use of chemical fertilizers and making production more expensive. The objective of this work was to evaluate the residual effect of the vegetal ash, bovine manure and mulching, under the chemical and physical characteristics of the soil in noni plants after two years of the initial cultivation. Twenty treatments were used to conduct the experiment, with five doses of ash (0, 0.9, 4.4, 7.8, 11.33 kg plant-1), with and without dead cover from banana leaves, without and with 1.4 kg plant-1 of bovine manure. The experimental area has dimensions of 40 m x 70 m. It is located in the Agricultural Sector of the Center for Human, Social and Agrarian Sciences, Campus III, Federal University of Paraíba, municipality of Bananeiras, PB. In the year 2016, it received the application of the above mentioned treatments. In May 2018, the soil was collected to evaluate the residual effects of treatments on edaphic properties (chemical and physical). The following chemical analyzes were performed: pH, P, K +, Na+, H ++ Al 3+, Al 3+, Ca 2+, Ca 2+, Mg 2+, MO, SB, CTC, and V% of soil and physical soil and particle density, total porosity, electrical conductivity and texture. The application of vegetal ashes increased the pH of the soil and the levels of P, K+ and Ca2+, evidencing that the utilization of this fertilization can overcome the deficiency of these nutrients and that their effect on the soil is long lasting. Fertilization with bovine manure increased the content of organic matter, sum of base and calcium. The use of mulch with banana straw did not influence the chemical properties of the soil. Bovine manure provided a decrease in soil bulk density.