MECHANICAL RESISTANCE TO PENETRATION IN PASTURE AREAS UNDER DIFFERENT FERTILIZATIONS
Soil resistance to root penetration (RP) is one of the physical attributes that directly influence the growth of the roots and, consequently, the aerial part of the plants. The chicken bed has been used for agricultural purposes as a source of nutrients and conditioning the physical attributes of the soil. There is a consensus in society that the Pig and Poultry sectors should adopt a posture that respects the quality of the environment and life. The response of the crops to the application depends on the soil fertility status, but PR can establish critical nutrient availability levels for the plant. The objective of this work was to evaluate the effect of chicken litter on resistance to penetration (RP) in areas of Panicum maximum, in the region of Rio Verde, GO. The experiment was installed in a dystroferric Red Latosol area at Centro Tecnológico da Comigo (CTC). The experimental design was in randomized blocks, with four replications. Treatments 1, 2 and 3 were, respectively, at the doses of 0 Mg chicken bed ha-1, 20 Mg chicken bed ha-1 and 40 Mg chicken bed ha-1. The three treatments were high in RP values at depths 0 to 20, 20 to 40 and 40 to 60 cm. Although the PR values were very high, treatment with 20 Mg and 40 Mg ha-1 of chicken litter had a higher RP value (8.52 MPa) in the 0 to 20 cm layer compared to witness.