Intake, nutrient digestibility and performance of dairy heifers fed diets containing palm kernel cake

Revista Brasileira de Zootecnia

Maciel, Raylon Pereira¹  Restle, João²  Cunha, Odislei Fagner Ribeiro¹  Mendes, Clayton Quirino³  Araujo, Vera Lúcia de²  Lôbo, Raimundo Nonato Braga¹  Paiva, Joseilson²  Neiva, José Neuman Miranda² 

[1] Universidade Federal do Tocantins;Universidade de Brasília

关键词: biodiesel;    byproduct;    byproducts of biodiesel;    Elaeis guineensis;    nutritive value;    weight gain     IntroduçãoA causa mais comum da elevada idade ao primeiro parto em sistemas de produção de gado de leite é a nutrição inadequada das novilhas;   

DOI  :  10.1590/S1516-35982012000300033

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective was to evaluate the effects of inclusion of palm kernel cake in the diet on intake, digestibility and performance of dairy heifers. Sixteen dairy Holstein-Zebu crossbred heifers with average age of 13 months and average weight of 183.4±32.5 kg were distributed to four treatments in a completely randomized design with four levels of palm kernel cake (0, 11.9, 22.9 and 34.2% from total dry matter), each one with four replicates. The intake of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), non-fibrous carbohydrates (NFC), ether extract (EE) and total digestible nutrients (TDN), and the apparent digestibility of DM, CP, NDF, NFC and EE were evaluated. There was linear reduction in DM, CP, NDF, NFC, and TDN intake. The apparent digestibility of DM and NDF reduced with the inclusion of palm kernel cake in the diet, while the apparent digestibility of CP and NFC showed quadratic effect. The inclusion of palm kernel cake in the diets resulted in linear increase in the apparent digestibility of ether extract. Weight gain decreased linearly with the inclusion of palm kernel cake in the diet, with values of 1.06, 0.99, 0.89 and 0.54 kg/day for diets containing 0, 11.9, 22, 9 or 34.2% palm kernel cake, respectively. Feed conversion was not affected by the inclusion of levels of palm kernel cake. The inclusion of palm kernel cake in the diet reduces nutrient intake and performance of dairy heifers during growth, but when used in levels up to 24.6% of the total diet, it provides weight gain compatible with growth programs aiming calving at 24 months of age.

【 授权许可】

CC BY-NC