Evaluation of coffee hulls as a feedstuff for HolsteinâZebu dairy cows / AvaliaÃÃo da casca de cafà como alimento para vacas leiteiras HolandÃs-Zebu

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

The objective of this experiment was to evaluate the performance of Holstein-Zebu dairy cows fed concentrates containing 25% of coffee hulls (Coffee) or citrus pulp (Pulp) in substitution to ground corn grain (Corn; 47.4% of the concentrate). Forty two cows were blocked based on milk yield and allocated to one of the three treatments for 56 days, after a 14-day standardization period. Concentrates were fed twice a day during milking time at the ratio of 1 kg of concentrate to each 2.5 kg of the average milk yield of the block measured at the end of the standardization period. The animals were supplemented with 20 kg of sugarcane and had access to Bracchiaria pasture. Measurements of the same variable obtained at the end of the standardization period were used as covariate in the statistical model. Data obtained weekly were analyzed as repeated measures with the SAS Mixed procedure. The substitution of corn by coffee hulls decreased milk and solids yield while citrus pulp resulted in similar performance to corn. The daily 3.5% fat-corrected milk yield was 7.5 kg on Corn, 7.9 kg on Pulp and 6.2 kg on Coffee (P<0.01). The decrease in milk yield for treatment Coffee was observed in the first week of application of treatments and was maintained throughout the experimental period. Cows consuming coffee hulls had greater loss of body weight (P=0.03). Feed orts during milking was 30% on Coffee (P<0.001), higher throughout the experimental period, resulting in smaller concentrate intake in this treatment (P<0.001). Frequency of cows with difficult stall entrance during milking was 10% on Coffee and 1% on the other two treatments (P<0.01). There was no detectable effect of coffee hulls on animal behavior during milking, on the frequency of parlor defecation and on somatic cell count (P>0.46). Concentrate Pulp was the one of greatest financial efficiency and Coffee the least efficient (P=0.05). The smallest cost per kg of the concentrate with coffee hulls was not advantageous proportionally to the induced decrease in milk yield per animal. The daily consumption of coffee hulls was 575 grams per animal. These data suggest that the potential of coffee hulls as a feedstuff for lactating cow diets is low.

ASSUNTO(S)

casca de cafà citrus pulp nutriÃÃo animal dairy cows zootecnia coffee hulls animal nutrition vaca leiteira polpa de citros

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