Nutrient intake, productive performance and body measurements of dairy heifers fed with different sources of protein/Consumo de nutrientes, desempenho produtivo e medidas corporais de novilhas leiteiras alimentadas com diferentes fontes proteicas

This study evaluated the effect of different protein sources (soybean meal, cottonseed meal, peanut meal and sunflower meal) on dry matter and nutrient intake, productive performance and body measurements of dairy heifers, Holstein x Zebu, recreated in confinement. The experiment consisted in a rand...

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Published in:Acta scientiarum. Animal sciences Vol. 35; no. 3; p. 273
Main Authors: Mota, Diego Azevedo, Berchielli, Telma Teresinha, Canesin, Roberta Carrilho, Rosa, Bruna Laurindo, Ribeiro, Andressa Ferreira, Brandt, Heitor Violin
Format: Journal Article
Language:Spanish
Published: Universidade Estadual de Maringa 01-07-2013
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Summary:This study evaluated the effect of different protein sources (soybean meal, cottonseed meal, peanut meal and sunflower meal) on dry matter and nutrient intake, productive performance and body measurements of dairy heifers, Holstein x Zebu, recreated in confinement. The experiment consisted in a randomized complete block design made up by 6 replications and 4 treatments. The mean values of ingestion of ether extract (EEI, kg [day.sup.-1]) were statistically different (p < 0.05). The neutral detergent fiber intake (NDFI, %BW) also presented differences (p < 0.05), with higher values in the diet containing sunflower meal (1.01% BW) in relation to the diet with soybean meal (0.84% BW). The average daily weight gain using the diet with soybean meal was superior (0.95 kg [day.sup.-1]) to the diet with sunflower meal (0.82 kg [day.sup.-1]), and considering the final body weight, the diet with soybean meal was superior to the other treatments (p < 0.05). The heart girth presented greater association with body weight (0.93). The soybean meal promoted the best productive performance of crossbred Holstein x Zebu heifers fed diets based on sugarcane. However, cottonseed meal, peanut meal and sunflower meal can be possible alternatives to soybean meal. Keywords: body measurement, daily gain, protein concentrate, sugarcane. Objetivou-se avaliar o efeito de diferentes fontes proteicas (farelo de soja, farelo de algodao, farelo de amendoim e farelo de girassol) sobre o consumo de materia seca e nutrientes, desempenho produtivo e medidas corporais de novilhas leiteiras, mesticas Holandes x Zebu, recriadas em confinamento. O delineamento experimental foi em blocos completos casualizados, constituido por seis repeticoes e quatro tratamentos. Os valores medios de ingestao de extrato etereo (IEE, kg [dia.sup.-1]) apresentaram diferenca estatistica (p < 0,05). A ingestao de fibra em detergente neutro em % do peso corporal foi superior (p < 0,05) na dieta com farelo de girassol (1,01 %PC) em relacao a dieta com farelo de soja (0,84 %PC). O ganho medio de peso corporal promovido pela dieta com o farelo de soja foi superior (0,95 kg [dia.sup.-1]) a dieta com farelo de girassol (0,82 kg [dia.sup.-1]), e no peso corporal final a dieta com o farelo de soja foi superior aos demais (p < 0,05). A medida biometrica perimetro toracico apresentou maior grau de associacao com o peso corporal (0,93). O farelo de soja proporciona melhor desempenho produtivo a novilhas mesticas Holandesa x Zebu, alimentadas com dietas a base de cana-de-acucar. Contudo, o farelo de algodao, farelo de amendoim e farelo de girassol pode ser possiveis substitutos do farelo de soja. Palavras-chave: medidas corporais, ganho diario, concentrados proteicos, cana-de-acucar.
ISSN:1806-2636
DOI:10.4025/actascianimsci.v35i3.18749