Performance and nutritional parameters of lactating cows on pasture receiving castor bean meal

Dicastro Dias de Souza, Fabiano Ferreira da Silva, Robério Rodrigues Silva, Antonio Ferraz Porto Junior, Leidiane Reis Pimentel, Bismarck Moreira Santiago, Andrêssa Pires dos Santos, Thatiane Mota Vieira, Wêndel Bispo Santos e Santos, Agnaldo Rios da Silva

Abstract


This study aimed to evaluate the inclusion of castor bean meal in the diet for lactating cows on Bracharia brizhanta pasture and its implications for nutritional and productive parameters. Eight crossbred cows were distributed in two 4 x 4 Latin squares, with four (0%; 3.33%; 6.66% and 10%) inclusion levels of castor bean meal in the total diet. The experiment consisted of four experimental periods of 21 days each. The digestibility and dry matter intake were estimated from fecal output, checked with the aid of external (chromium oxide) and internal (iNDF) indicators. Urine and milk were collected to determine the nitrogen balance and microbial protein production. The inclusion of different levels of castor bean meal in the diet for lactating cows did not affect the intake of dry matter and nutrients, and the same lack of effect was found for the digestibility of dry matter and total digestible nutrients, variation in body weight, milk production, chemical composition of milk, microbial production and nitrogen balance. The inclusion of up to 10% castor bean meal in the total diet did not influence productive parameters evaluated, and the use was conditioned to the price of castor bean meal.

Keywords


Nitrogen balance; Consumption; Milk production; Microbial protein.

Full Text:

PDF


DOI: http://dx.doi.org/10.5433/1679-0359.2017v38n4Supl1p2619

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional