Faculty of Veterinary Medicine University of Zagreb
Abstract
The aim of the present research was to determine the blood metabolic profile and acid-base balance of dairy goats and of their kids during lactation. Analyses were made of 15 Alpine goats and their suckling kids, in a traditional production system. The goats’ blood was collected from the 20th to the 140th day of lactation every 30th day. Kids´ blood was collected on the 20th and 50th days of life. From the blood samples the values of pH, partial pressure of carbon dioxide (pCO2), partial pressure of oxygen (pO2), total pressure of carbon dioxide (tCO2) and bicarbonate (HCO3-) were determined. Afterwards, the blood samples collected from the goats and kids were centrifuged, and from the plasma obtained the concentrations of calcium, phosphorus-inorganic, potassium, sodium, iron, chloride, urea, glucose, total proteins, albumin, creatinine, cholesterol, HDL-cholesterol, LDL-cholesterol, trygliceryds, alkaline phosphatase (ALP), creatine kinase (CK) and γ-glutamyl transferase (GGT) were assessed. Also, the strong ion difference (SID), anion gap (AG) and z-values were determined from the blood of the goats and kids. The results were obtained by MEANS procedure, and differences between the groups were determined using ANOVA repeated measures. A significant decrease in glucose, tryglicerides, Na and Fe concentrations was determined, as well as the AG and SID content in the blood, and increases in cholesterol, HDL-cholesterol, LDL-cholesterol, total protein, albumin, globulin and P-inorganic in the blood of goats during lactation. The concentrations of Cl, creatinine, and enzymatic activity (CK, GGT and ALP) in the blood of goats during lactation did not differ significantly. The results of the blood metabolic profile and acid-base balance indicate the need for better control of goats and kids´ rations in traditional production systems.Cilj ovog istraživanja bio je utvrditi metabolički profil i acidobaznu ravnotežu krvi mliječnih koza u laktaciji, kao i njihove jaradi. Pokus je proveden na 15 koza pasmine francuska alpina i njihove sisajuće jaradi u tradicionalnom sustavu uzgoja. Uzorkovanje krvi koza provedeno je od 20. do 140. dana laktacije, svakih 30 dana. Uzorkovanje krvi jaradi provedeno je u dobi od 20 i 50 dana. U krvi su utvrđene vrijednosti pH, parcijalni tlak ugljikova dioksida (pCO2), parcijalni tlak kisika (pO2), ukupni tlak ugljikova dioksida (tCO2) i sadržaj bikarbonata (HCO3). U plazmi dobivenoj centrifugiranjem uzoraka krvi koza i jaradi utvrđene su koncentracije kalcija, fosfora-anorganskog, kalija, natrija, željeza, klora, ureje, glukoze, ukupnih proteina, albumina, kreatinina, kolesterola, HDL-kolesterola, LDL-kolesterola, triglicerida, alkalne fosfataze (ALP), kreatin kinaze (CK) i γ-glutamil transferaze (GGT). U krvi koza i jaradi utvrđena je razlika jakih iona (SID), anionski procjep (AG) te z-vrijednost. Rezultati su analizirani MEANS procedurom, a razlike između skupina utvrđene su procedurom ANOVA-repeated measures. U krvi koza u laktaciji utvrđeno je značajno smanjenje koncentracije glukoze, triglicerida, Na i Fe, kao i sadržaj AG i SID te povećanje kolesterola, HDL-kolesterola, LDL-kolesterola, ukupnih proteina, albumina, globulina i P-anorganski. U krvi koza u laktaciji nisu utvrđene značajne razlike koncentracije Cl, kreatinina i aktivnosti enzima (kao što su CK, GGT i ALP). Rezultati metaboličkog profila i acidobazne ravnoteže ukazuju na potrebu praćenja kvalitete obroka koza i jaradi u tradicionalnom sustavu proizvodnje
