Evaluation of chemical attributes of soil under different management systems of sugarcane in an area of expansion

Resumo

In the area of expansion, where if you have restriction on fertility, soil preparation has contributed considerably to the improvement of the physical, chemical and water conditions of soils and, consequently, to the proper development of culture of sugarcane. The aim of this study was to evaluate the effect of different management techniques on the availability of nutrients in soil in an area of expansion of sugarcane, formerly with Brachiaria decumbens, in the Cerrado region. The experiment was conducted using the CTC 2 variety at Jalles Machado mill in Goianésia, GO. The experiment was established in a randomized block design, with six treatments and four replications. Chemical attributes of soil were evaluated at depths of 0-20, 20-40 and 40-60 cm. Significant differences were found among depths for all analyzed attributes. Adopted management systems influenced chemical attributes and the availability of nutrients for plants. Invertion of soil through plowing and harrowing is extremely beneficial to carry out soil amendment in the first year of cultivation, improving the incorporation and effectiveness of the corrective. The adoption of no-tillage system did not prove to be the best option for the first year of sugarcane cultivation, hindering the incorporation of the corrective.