in order to survey of using iodine levels above of nrc recommendations on performance and thyroidal hormones, sixteen holstein dairy cows with the average live body weight and daily milk production of 652 ± 43 and 32.9 ± 2.4 kg respectively, allocated to 4 treatments in a complete randomized design. the dietary treatments were 1) the basal diet (without potassium iodide) as control diet, 2, 3 a...

This study was conducted to 1) determine milk yield of sows that were machine milked up to four times daily; 2) determine the effect of pig substitution on milk yield; 3) assess litter weight changes for sows that are milked; and 4) determine milk composition. Eight sows were milked four times daily to d 51 postpartum. Sows either maintained their own litter or had a week-old replacement litter...

The effect of nutrition on milk fat yield and composition has largely been investigated in cows and goats, with some differences for fatty acid (FA) composition responses and marked species differences in milk fat yield response. Recently, the characterization of lipogenic genes in ruminant species allowed in vivo studies focused on the effect of nutrition on mammary expression of these genes, ...

The objective of this study was to examine the effects of concentrates containing different levels of a vitamin-trace elements premix on milk yield and composition of dairy cows. The trial, which lasted 14 weeks, was conducted from January to March and used 45 multiparous Brown cows in the early phase of lactation. Cows (n = 15 per treatment) were randomly allocated to three dietary treatments:...

the objective of this study was to estimates the genetic and environmental components for the lactation curve parameters, milk yield, age at first calving (afc), calving interval (ci) and somatic cell count (scc) in iranian holstein cows. the dataset consisted of 210625 test day records from 25883 cows with milk yield in the first parity recorded from july 2002 to september 2007 in a total of 9...

This study examines the effect of physically effective Neutral Detergent Fiber (peNDF) value roughage on milk composition and yield. The NDF varies depending particle length amount structural non-structural carbohydrates in diet. quality, quantity, are crucial for a healthy rumen. longer is, more cow ruminates saliva it produces. produced is used to balance rumen pH. It aimed protect animal hea...

Prophet of POU1F1 (PROP1) plays direct or indirect important roles in the morphogenesis of pituitary gonadotropes as well as lactotropes, somatotropes and caudomedial thyrotropes. It also controls the expression of growth hormone, prolactin and thyrotropin subunits through regulatory PIT1 factor. These hormones have important influences on production traits in most animal species including the ...

the aim of this study was to evaluate the effects of feeding pistachio hull (ph) as a source of tannin and polyethylene glycol (peg) supplementation on feed intake, nutrients digestibility, milk yield and compositions, blood lipid metabolits and milk fatty acids profile in saanen dairy goats. nine maltiparus saanen dairy goats were used in a 3 × 3 replicated latin square design with 21-d period...