Disponibilidade de P e K em solos cultivados com milho e mandioca no município de Capim-PB

Abstract

Fertilization with animal manure over time increases the availability of nutrients (P and K) and is used to reduce the amount of chemical fertilizers in the soil. The objective of this work was to compare the availability of the macronutrients P and K in two different soils fertilized with animal manure during one year, cultivated with maize and cassava. The current work was carried out in two distinct areas located in the municipality of Capim - PB. Soil samples were collected at depth of 20 cm, then taken to the soil fertility laboratory of the UFPB in Campus II. With the data obtained, they were submitted to statistical analysis using SISVAR Software 5.6. the pH showed a significant difference between the areas, presenting a significant difference the 5th and 6th collecting in area 1 and in area 2 only in 6th and 7th collect. The available P results showed that there was a significant difference in the areas, with a significan t increase to 60 days. In relation to the contents of K, in area 1, the 6th collection had a value below the ideal limit and the other collections. With the results obtained, it was concluded that the organic fertilization decreased the acidity of the soils, favoring the availability of macronutrients.