Caraterísticas do solo, crescimento e composição bromatológica em cultivo de sorgo em resposta à cobertura morta

Abstract

The use of mulch on the soil has proved an efficient practice to protect the soil from erosion, maintain stable temperature, reduce water losses and provide nutrients and organic matter, favoring the growth and development of commercial interest cultures. Therefore, this study aimed to evaluate the effect of using mulch on the soil in the development of the culture Sorghum (Sorghum bicolor L. Moench ) and its botanical composition, as well as the effect of mulch in chemical and physical attributes, soil moisture and the temperature. Four experimental plots were installed, with 3m2 of area bounded by metal plates, 20 inches height, approximately 10 cm fixed on the soil, where were installed two treatments: sorghum planting with mulch (COB) and sorghum planting without mulch (Ctrl). Six plants in each plot were selected to measure the height and number of leaves in each treatment. Soil temperature was measured through weekly measurements with a digital thermometer in six points of the plot. The use of mulch reduced significantly the temperature and soil moisture. Also noted that the plant had development influences by pest attack. The use of mulch in the soil had a positive effect on physical and chemical soil since it reduced the temperature and increased organic matter and soil moisture, providing better physical and chemical conditions of the same.