Efeito do carbonato de cálcio de alto PRNT na física do solo

Abstract

The objective of this work was to evaluate the effect of the application of calcium carbonate (CaCO3) of high PRNT granulated on the physical attributes of the soil and on the dry matter (DM) production of black oats in no - tillage system (SPD) In a Red Dystrophic Nitosol soil with 49.5% clay. A high PN and PRNT CaCO3 originated from Pains - MG granulated was used, applied in the planting line in the black oat crop in SPD. The applied dose was 570 kg / ha of CaCO3, corresponding to 31% of the ideal dose to correct the Ca in the CTC to 55%. For soil dry matter evaluations, 3 samples were taken per plot, totaling 6 samples with treatment and 6 samples without treatment. For the physical analysis, 3 samples of each depth were collected, that is of 00-05 cm, 05-10 cm, 10-15 cm, 15-20 cm and 20-25 cm, in each replicate in the treatment plots and collecting In the same way in the control plots, totaling 60 samples. The dry matter (DM) result gave an increase of 30.8% more over the untreated plots. The soil density was less significant, however, with only 130 days of application in the treated plots, total porosity improved by 2.2%, macropores increased by around 11%, and soil density Improved by around 3.3% in favor of treatment, so a significant result in such a short time.