فهرس المقالات early lactating cows

• حرية الوصول المقاله
  • صفحة الملخص
  • نص كامل
  
  1 - Effect of Two New Calcium Limiting Methods on Milk Traits, Hypocalcaemia and Prevention of some Reproductive Disorders in Early Lactating Cows
  M.M. Masoumipour F. Foroudi N. Karimi M.R. Abedini K. Karimi
  New methods of dietary calcium restriction to control hypocalcaemia and reproductive problems have always been the focus of research. This study was conducted to compare two new methods including two diets containing Zeolite and anionic salt with a conventional method o أکثر

  New methods of dietary calcium restriction to control hypocalcaemia and reproductive problems have always been the focus of research. This study was conducted to compare two new methods including two diets containing Zeolite and anionic salt with a conventional method of the low-Ca diet. Sixty periparturient cows were used through a completely randomized statistical design (CRD) with repeated measurements in time. Experimental diets were included: 1. low-Ca (Ca=0.44%), 2. anionic-Kipro (Ca=1%), 3. zeolite (Ca=0.44%). Traits were included: feed and nutrients intake, milk characteristics, plasma calcium concentration, body condition score (BCS), and incidence of reproductive problems. Feed, energy, and nutrient intake of low-Ca were higher than anionic-Kipro and zeolite groups (P≤0.01). Raw and corrected milk yield of anionic-Kipro was at maximum, but fat% and fat yield of zeolite was higher than other groups (P≤0.01). Total plasma and ionized calcium concentration at 6 and 12 hours after calving of low-Ca and zeolite diets were higher than the anionic-Kipro group (P≤0.01). BCS of zeolite and anionic-Kipro diets (2.98 and 2.95) was higher than the low-Ca diet (2.86) significantly (P≤0.01). The frequency of severe and subclinical hypocalcaemia and reproductive problems in two new proposed methods and younger cows was at least (P≤0.01). New dietary calcium limiting methods with zeolite and anionic-Kipro supplementation had good results on milk traits with better control on plasma calcium concentration and prevention of reproductive disorders and could be advised. تفاصيل المقالة