Vilela et al., 2003. Rev. Bras. Zootec., 32 (5): 1243-1249

The purpose of this study was to evaluate the effect of inclusion of roasted whole soyabean (RWS) on the concentrate composition for supplementary feeding of Holstein cows on coastcross-1 pasture. Twelve early-lactating cows were divided into two groups as follows: (A) cows fed standard concentrate (control) containing soyabean meal (23.5% CP and 80% TDN); and (B) cows fed RWS-enriched concentrate (19.5% CP and 86% TDN). Daily concentrate feeding was 9 kg/cow. An electric fence was utilized for pasture management, which was based on rotational grazing, with one day of paddock occupation and a resting period of 25 days. The experiment lasted 100 days. During summer, the pasture was fertilized with 140, 32 and 112 kg/ha of N, P 2O 5 and K 2O, respectively, divided into four applications. The inclusion of RWS caused an increase in milk production and fat-corrected (to 3.5%) milk production (22.2 and 23.6 kg/cow/day) compared to those of the control cows (19.8 and 19.7 kg/cow/day). The milk fat levels in the treatment and control cows were 4.16 and 3.49%, respectively. The cows fed RWS-enriched concentrate exhibited superior milk production, reaching 145.4 kg milk/ha/day. In both treatments, the cows showed weight gains.