DYNAMIC OF CHANGES OF BLOOD PLASMA ENERGY METABOLISM PARAMETERS IN SUCKLING COWS DURING CALVING INTERVAL

Ales Pavlik

doi:10.15414/jmbfs.2015.4.special2.92-93

Abstract

In this study, effect of environmental condition changes during gazing period on energy metabolism parameters was investigated. Totally 40 Aberdeen Angus cows were selected for observation. Calving all of cows was situated into March. The feeding ration for the animals was comprised by pasture during the grazing period and corn silage, hay and granulated distiller’s grains during the winter period. At average age 9 days before calving, and subsequently 10, 81, 151, 189 and 273 days after calving, blood was sampled and analysed for glucose and NEFA (non-esterified fatty acid) concentrations on KONELAB T20xt automatic analyser (Thermo Fisher Scientific, Finland) and currently available commercial kits (Biovendor-Laboratorni medicina, Czech Republic). A rapid increase (p < 0.05) of glucose concentration was detected in blood plasma of cows in period before calving to 81 days post partum. Average value of glucose concentration at 273 days postpartum was significant (p < 0.05) lower comparing to day 189. The highest concentrations of NEFA in blood plasma of cows were found at 10 day postpartum. After that, during the persisted higher temperature period the NEFA concentration decreased significantly (p < 0.01) till 189 days postpartum. At the end of monitored period concentration of NEFA in blood plasma significantly decreased (p < 0.05). Changes of hot and cold season during the grazing period probably according to forage quality and had significant effects on blood plasma NEFA and glucose concentrations.

Highlights

In beef cattle during the grazing, the nutrition is influenced by seasonal fluctuations in the nutritive quality of rangelands, which subsequently affects diet composition and selectivity of grazing cattle (Obeidat et al, 2002)
Poppi and McLennan (1995) and Devendra and Sevilla (2002) reported that during the early to mid hot-wet season, rangelands are not an adequate source of energy. These changes are accompanied by decreased in degradation and fermentation ruminal and affected nutritional state of grazing cattle
It is well recognized that nutritional state of the grazing cattle is related with blood glucose and non-esterified fatty acids as well as another metabolic parameters (Agenas et al, 2006; Yokus and Cakir, 2006; González-Garcia et al, 2011)

Summary

INTRODUCTION

In beef cattle during the grazing, the nutrition is influenced by seasonal fluctuations in the nutritive quality of rangelands, which subsequently affects diet composition and selectivity of grazing cattle (Obeidat et al, 2002). Poppi and McLennan (1995) and Devendra and Sevilla (2002) reported that during the early to mid hot-wet season, rangelands are not an adequate source of energy. Poppi and McLennan (1995) and Devendra and Sevilla (2002) reported that during the early to mid hot-wet season, rangelands are not an adequate source of energy. These changes are accompanied by decreased in degradation and fermentation ruminal and affected nutritional state of grazing cattle. It is well recognized that nutritional state of the grazing cattle is related with blood glucose and non-esterified fatty acids as well as another metabolic parameters (Agenas et al, 2006; Yokus and Cakir, 2006; González-Garcia et al, 2011). This study supposes that blood concentrations of glucose and non-esterified fatty acids are sensitive to seasonal changes in the nutritive quality and ruminal fermentation of diet consumed by grazing beef cattle

MATERIALS AND METHODS

Findings

CONCLUSION