The Effect of Decreased Protein Levels in Sow Diets on Nitrogen Content of Faeces and Physiological Parameters of Blood

Abstract

The Effect of Decreased Protein Levels in Sow Diets on Nitrogen Content of Faeces and Physiological Parameters of BloodThe research material consisted of 42 sows divided into 3 feeding groups, 14 individuals in each group, which received feed mixtures with different protein levels. Protein and amino acid levels in the control group were in accordance with recommendations contained in Polish standards. The level of protein in experimental groups was decreased by 10 and 20%, respectively, and the levels of lysine, methionine, threonine and tryptophan were adjusted to those of the control group. During the gestation and lactation periods all sows were fed individually. The content of dry matter, nitrogen, fibre, fat and ash was determined in samples of faeces collected at 60 and 105 days of pregnancy, and the total nitrogen content was assessed in urine. Blood from sows was collected on day 14 of lactation, and indices of protein, fat transformation and mineral components content were determined in blood serum. The results of the analysis of faeces and urine prove that pregnant sows from the experimental groups excreted 7% and 10% less nitrogen in faeces, and 18% and 23% less urine in faeces. The reduced protein level in feed mixtures did not significantly influence the content of dry matter, fibre and ash in faeces. A significant decrease in the content of total protein, globulins, urea and an increase in cholesterol level was observed in the blood serum of sows from both experimental groups. No influence of the reduced protein level in feed on the content of mineral compounds in blood serum or haematological parameters of the sows' blood was noted.

Effect of short-lasting undernutrition of gilts during peri-conceptional period on biochemical and haematological parameters in blood plasma during peri-implantation period

“…In this study, the changes of lipid metabolism in gravid gilts were demonstrated as a result of short-lasting restricted diet. In other study, longterm feeding of an unbalanced diet during pregnancy caused disruption of protein and lipid metabolism in organisms of gravid pigs (kornieWicz et al 2012). The decrease of total proteins, globulins and urea serum concentrations was demonstrated in these sows.…”

“…It should be emphasized that multiple factors may affect these parameters. Apart from the feeding (chmieloWiec-korzenioWska et al 2012, kornieWicz et al 2012, the age of animals, gender, breeding, reproductive period, housing, health and season may affect biochemical profile of animals (TumBelson, kalish 1971, oDink et al 1990, elBers et al 1991.…”

“…Biochemical and haematological profiles in peripheral blood of sows within the physiological range are essential for the maintenance of homeostasis and health required for efficient reproduction (oDink et al 1990, elBers et al 1991. The measurement of these parameters in pigs may be useful also as an indicator of the effect of dietary components as well as an unbalanced diet on the disruption of homeostasis (ŠTukelj et al 2010, chmieloWiec-korzenioWska et al 2012, kornieWicz et al 2012.…”