This work aimed to evaluate the effect of soil cover and doses of sludge from sedimentation pond of swine wastewater on yield and nutrient export in sugar beet cultivar Early Wonder. The experiment was conducted at the Vale do Piranga Experimental Farm belonging to EPAMIG Zona da Mata in Oratórios (MG), from 07/08/08 to 09/11/08. The experiment was arranged in a split-plot in randomized block design with four replications. The main plots consisted of three types of mulching: sugarcane bagasse, coffee husk and without any cover, and the subplots of five doses of sludge: 0, 10, 20, 40 and 60 t ha-1. At 70 days after transplanting, harvest was carried out. Mulching with coffee husk provided the highest root unit weight and increased yield of commercial roots, independent of the sludge dose. The most exported nutrients by the shoots were Ca, Mg and S, while N, P and K were the most exported by the roots. With a population of 400,000 plants ha-1and yield of 34.22 t ha-1, the mean quantities of N, P, K, Ca, Mg and S exported by the roots were 140, 24, 180, 8, 17 and 5 kg ha-1and 371, 435, 320, 74 and 250 g ha-1of Zn, Fe, Mn, Cu and B respectively.
Beta vulgaris; soil cover; yield; organic manure; swine manure; sludge
