Leucine levels in low protein diets for pigs in the initial phase

Semina: Ciências Agrárias

Vinicius Ricardo Cambito de Paula¹  Silvia Leticia Ferreira¹  Ricardo de Souza Vasconcellos²  Lucas Antonio Costa Esteves²  Paulo Cesar Pozza²  Leandro Dalcin Castilha²  Marcelise Regina Fachinello²  Laura Marcela Diaz Huepa²  Tiago Junior Pasquetti³ 

[1] Universidade Estadual Paulista "Júlio de Mesquita Filho";Universidade Estadual de Maringá;Universidade Estadual de Mato Grosso do Sul;

关键词: Antagonism;    Blood parameters;    Branched chain amino acids;    Performance.;   

DOI  :  10.5433/1679-0359.2017v38n6p3829

来源: DOAJ

【 摘 要 】

The objective of this study was to evaluate the standardized ileal digestible (SID) leucine levels in low crude protein diets on Performance, backfat thickness, longissimus dorsi depth and biochemical blood parameters of starting pigs. A total of 50 pigs, with initial weight of 11.14±0.24 kg; were distributed in a randomized blocks design with five treatments (1.10; 1.25; 1.40; 1.55 and 1.70% SID leucine), five replicates and two animals per experimental unit, comprised for a barrow and a gilt. The feed conversion ratio (FCR) reduced (P=0.018) due to the increasing SID leucine levels, without affecting other growth performance parameters (final weight, average daily feed intake, average daily gain, backfat thickness, longissimus dorsi depth and lean meat percentage). There was a quadratic effect for plasma triglyceride (P=0.049) and plasma urea (P=0.001). The optimal SID leucine levels obtained for triglycerides and urea were 1.16% and 1.24%, respectively, by associating the quadratic model with the Linear Response Plateu. Low crude protein diets with SID leucine levels up to 1.70% improved the feed conversion with desired urea and triglycerides concentration in blood plasmas achieved at 1.16% and 1.24%, respectively.

【 授权许可】

Unknown