Parâmetros nutricionais do capim-tanzânia sob doses crescentes de nitrogênio em diferentes idades de corte

Abstract

The objective this experiment was to evaluate the chemical composition and in vitro dry matter digestibility of Tanzania grass under increasing nitrogen levels in different cutting ages, under irrigation. The treatments were three N levels (ammonium sulphate): 200, 400 and 600 kg.ha-1 for year and four cutting ages: 28; 56; 84 and 112 days. A randomized complete blocks design in factorial 3x4 arrangement (three N levels and four cutting ages, with three repetitions) was used. The analyses were accomplished using the statistical System of Analysis of Variance of Data Balanced (SISVAR) program. The DM tenors didn’t differ (P<0.05) among the cutting ages, except to the 112 days of increasing. Among the N levels the DM tenors differed (P<0.05) with the equivalent application to 400 and 600 kg.ha-1 of N. The CP (P>0.05) didn’t differ among the cutting ages, however they differed (P<0.05) among the N leves appraised. The NDF ADF and IVDMD didn’t differ (P>0.05) among the cutting ages, except the 112 days, however, they differed among the N levels applied.