ANALYSIS OF THE NUTRIENT CONTENTS OF SWINE BIOFERTILIZER IN THE SOIL

Abstract

The objective of this work was to verify through statistical analysis, analysis of variance by the F test, regression analysis, and multivariate analysis the behavior of the nutrient contents of the biofertilizer in the soil. For this, different levels of doses of liquid swine biofertilizer were used to identify which variables had relevant statistical significance, among the variables, pH, organic matter, phosphorus, potassium, calcium, magnesium, hydrogen + aluminum, aluminum, base saturation, boron, copper, iron, manganese, and zinc. The soil used was of the Red Latosol type. The option to use swine biofertilizer in this experiment is because in Brazil, the pig activity generates large amounts of manure that must be used in agricultural production. The experiment was carried out with 30 plots (pots of 500 grams each) conditioned and treated in an air-conditioned oven at a temperature between 28ºC and 31ºC, in the microbiology laboratory of the Prof. Edson Antônio Velano University - Unifenas, Alfenas Campus, in a completely randomized design - DIC, with 5 treatments and 6 replications. The period of liming and maintenance of field humidity was 70 days. The treatments were conducted with swine biofertilizer collected at the Unifenas Retiro School Farm in Alfenas, MG. The proportion of soil used was 40 m3, 80 m3, 160 m3, 320 m3 and 640 m3 per ha-1 corresponding to 10 ml, 20 ml, 40 ml, 80 ml, and 160 ml of biofertilizer respectively, plus the control plot that did not have the addition of biofertilizer and was named as 0ml. The amounts of biofertilizer were adopted after the first chemical analysis of the soil, and the swine biofertilizer was carried out. For data collection and verification, statistical analysis, analysis of variance by the F test, regression analysis, determination of the coefficient (R2), and others, the Sisvar 19 software was used. The results of the analysis of variance showed that there was a significant effect on some nutrients as the progressive increase in biofertilizer doses, thus, as the dose increase, the soil nutritional load levels also increased. Therefore, the use of swine biofertilizer improved the structure and physical and chemical characteristics of the soil. Thus, several types of plants could be cultivated after the incorporation of swine biofertilizer into the soil, especially legumes, vegetables and perennial crops, especially fruit trees.