Digestible lysine levels in diets for primiparous lactating sows - DOI: 10.4025/actascianimsci.v30i3.1626

Abstract

The objective of the study is to evaluate, how the daily intake of different digestible lysine levels influence the productive and reproductive performance of first lactating sows, and the blood count through the measurement of creatine, urea and total protein. Fifty first lactating sows were used and distributed in five treatments (10 animals per treatment), correspondent to 0,88; 0,99; 1,04; 1,08 and 1,24% digestible lysine in the ration. These animals were distributed in a randomized block design with every sow as an experimental unit and 10 replicates. The results were evaluated through statistical variance models, using linear regression or quadratic corresponding to the adjustment. The performance of the sows (weight, back fat thickness and weaning-to-estrus interval) and the concentration of urea in the serum of the sows during the lactation weren’t influenced (P>0,05) through the level of lysine in the ration. The concentrations of creatine and total protein in the serum of the sows were influenced (P<0,10 and P<0,05, respectively) in determined periods through the level of digestible lysine in the ration. Concluded that the different levels of lysine didn’t influence the performance of the sows, the lower level of lysine could be used.