Dimensionamento de terraços para sistema plantio direto nas condições edafoclimáticas da Região Missioneira do Rio Grande do Sul

Abstract

In agriculture, whether global, national or regional, soil degradation is responsible for reducing average productivity and total food production. In the Missões region of Rio Grande do Sul, agriculture is predominantly crop production and the management that the farmers adopts is often insufficient in the production of straw and crop alternation, consequently causing problems of soil erosion improving the use of the No-Till System, adopting complementary conservation practices, such as the use of terraces. So, the present work elaborated the sizing of terraces for No-Till System by the Channel storage capacity method with capacities of 1500 and 1800 l m-1 and by the Lombardi Neto method for soybean cultivation in high and moderate soils erosion resistance in relation to the conditions of the Missões region of Rio Grande do Sul for soils with different slope and stable water infiltration rates using the Terrace 4.1 software. Both methods present different result patterns with respect to horizontal, vertical spacing and height of terraces, but the use of such results in the terraces sizing for the Missiões region of Rio Grande do Sul may favor the yield of the crops of interest and reduce water losses, improving thw water infiltration and reducing soil erosion problems