Intake, apparent digestibility, production, and composition of milk from cows fed diets with different sources of lipids

Revista Brasileira de Zootecnia

Cruz, Cláudia Horne da⁶  Carvalho, Gleidson Giordano Pinto de⁶  Eustáquio Filho, Antônio⁵  Maranhão, Camila Maida de Albuquerque⁴  Pires, Aureliano José Vieira¹  Silva, Fabiano Ferreira da¹  Veloso, Cristina Mattos²  Murta, Rogério Mendes³ 

[1] Universidade Estadual do Sudoeste da Bahia, Itapetinga, Brazil;Universidade Federal de Viçosa, Viçosa, Brazil;Instituto Federal do Norte de Minas Gerais, Montes Claros, Brazil;Universidade Estadual de Montes Claros, Montes Claros, Brazil;Instituto Federal de Educação, Ciência e Tecnologia do Norte de Minas Gerais, Montes Claros, Brasil;Universidade Federal da Bahia, Salvador, Brazil

关键词:  cottonseed;    dairy cows;    fat;    performance;    ruminant nutrition;    soyIntroductionThe search for low production costs in animal products has led to rational use of all feed resources available;   

DOI  :  10.1590/S1806-92902016000200003

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this study was to evaluate the effect of different sources of lipids in the diets of dairy cows on the intake and digestibility of nutritional fractions, and milk production and composition. The experiment was conducted in a 42-hectare area divided into eight paddocks covered with Brachiaria brizantha. Twelve crossbred Holstein × Zebu cows were distributed into three simultaneous 4 × 4 Latin squares. The treatments consisted of different sources of lipids, as follows: diet with no extra source of lipids; diet with cottonseed as the source of lipids; diet with soy oil; and diet with used frying soy oil. The intakes of dry matter, neutral detergent fiber, crude protein, total carbohydrates, and non-fibrous carbohydrates were similar for all diets. The use of lipid sources caused a decrease in the apparent digestibility of dry matter, neutral detergent fiber, non-fibrous carbohydrates, and crude protein. The levels of protein, lactose, and defatted dry matter were reduced with the use of lipid sources but did not affect milk production. The use of cottonseed, soy oil, and used frying soy oil as sources of lipids in diets for lactating cows at pasture do not improve milk production, and their use is therefore optional.

【 授权许可】

Unknown