Avaliação do desenvolvimento e absorção de nutrientes pelo Stylosanthes guianensis cv. mineirão sob doses crescentes de calcário em solo do cerrado

Abstract

The experiment was accomplished to evaluate the effect of growing doses of dolomite calcareous on plant grow, gross protein and phosphorus, zinc, calcium and magnesium contents of Stylosanthes guianensis cv. Mineirão. Five treatments of dolomite lime were considered: 0, 1, 2, 3 and 4 t/ha. The vases were arranged in randomized blocks with 4 replications. Ten days after the germination, one plant roughing was made that allowed the permanence of 10 plants for vase. The plants were harvested in two times at 10 cm height of the soil. The plant height and dry matter production were influenced by the lime application. Low doses of lime were enough to rise the protein content of plant. The efficiency of the lime for the phosphorus absorption is very small. High doses of lime are demanded to get the maximum phosphorus absorption. The lime application affects negatively the zinc absorption for the mother plant but positively for the sprouts and affiliates. Low doses of dolomite lime are necessary for the maximum absorption of calcium and magnesium in the first harvest, but larger doses are requested for the nutrient absorption by the plants grown after that.