Correctives of the acidity of the soil and levels of humidity in the development and nutrition of the sugarcane

Abstract

Sugar caner (Saccharum spp.) cultivation is quite disseminated throughout Brazilian territory due to its easy cultivation and its multiple uses such as  sugar and alcohol yield and animal feeding. In order to have a satisfactory yield, the combination of factors such as humidity and soil acidity correction should be corrected. This work had the objective of evaluating use of correctives (limestone and slag) in three levels of soil humidity, dry matter yield of shoot, culm, root and culm number of plant. Five levels of limestone and metallurgy slag corrective were evaluated, so that saturation by bases (V%)  remained after incubation with: N₁ (control, V = 21.4%), N₂ (V = 40%); N₃ (V = 60%); N₄ (V = 80%) and N₅ (V = 100%). Incubation was carried out in plastic sacks for 21 days, with humidity close to 70%. After 150 days of cultivation, counting of culm (CC) and cut of shoot were carried out by separating culm from leaves, determining dry matter of shoot (DMAP), dry matter of leaf (DML), dry matter of culm (DMC) dry matter of root (DMR). Usage of soil acidity correctives, level of water and level of saturation by bases influenced the development and mineral nutrition of sugar cane. Slag yield greater production of dry matter of shoot of sugar cane in relation to limestone for the lowest levels of water in soil (60 and 80%CC). Increase of saturation by bases with appliance of increasing doses of limestone and slag increased yield of aerial, leaves, stem and roots dry matter of sugar cane.