Geanderson Nascimento da Silva
Abstract:
In integrated crop-livestock under no-tillage, liming is done on the surface, it is possible that changes occur in the handling of the limestone in depth as a function of grazing. This study was conducted to evaluate attributes related to soil acidity after surface liming in integrated crop-livestock under no-tillage, subjected to grazing intensities in the Cerrado. The study was conducted at the Federal University of Goiás, Jataí Campus, of a Red Latosol (Oxisol). The treatments consisted of different heights pasture management: 25, 35 and 45 cm and area without grazing, arranged in blocks randomly. Were applied to 2.4 Mg ha-1 lime with effective neutralization value 80 % in surface soil after the harvest of soybean (March 2012). Soil samples were colleted depths: 0-2.5, 2.5-5.0, 5.0-7.5, 7.5-10.0, 10.0-15.0, 15, 0- 20.0 and 20.0-30.0 cm for the evaluation of chemical attributes before liming, seven months (end of the grazing cycle 2012) and 12 months (end of the cycle of soybeans in 2013) after liming. A greater correction of soil acidity in the system crop-livestock compared without grazing area in the same evaluation time, especially when that 12 months after the realization of liming. The different assessment times crop-livestock improved soil chemical properties in the first layer of soil, and soil acidity conditions worsened in depth in all areas, except in the smallest grazing intensity
