Dry matter and nutrients accumulation in mombasa guineagrass in function of nitrogen fertilization management

Abstract

The nitrogen is an element extremely important in forage, being the nutrient more influence on productivity and quality of pasture. The objective was to study a pasture with high yield potential using sources and rates of nitrogen. Nitrogen sources were ammonium nitrate and urea, as N rates: 0, 50, 100, 150 and 200 kg ha(-1) per harvest), in Mombasa guineagrass Panicum maximum cv. Mombaca), quantifying the accumulation of nutrients nitrogen N), phosphorus P) and potassium K) and the rate of accumulation of dry matter DM). Sources of N did not affect the accumulation of N, P and K and the rate of accumulation of dry matter DM). N rates positively influenced the accumulation of nutrients N and K and the rate of accumulation of dry matter DM), occurring increase with increasing doses of N. As nitrogen sources did not influence the general attributes analyzed, it recommends to use urea as a source of N fertilizer to be the largest concentration of N and lower cost per unit of nutrient, at a dose of 100 kg ha(-1), providing increase of nutrient accumulation, DM and maintenance of Mombasa guineagrass.