The study of relationship between effect of some environmental condition in some physiological haematological in cross bread Holstein Friesian Dairy H.Y.Al-Baiti, M.A.Al-Zahiri ,A.M.Al-Kinani

Abstract

The aim of this study was to conduct the effect of environmental conditions
(temperature degree and relative humidity) for three seasons ( winter , spring
and summer) on some physiological, productive and functional parameters of
Friesain dairy cow and their relation with two different lactational stages (
Second and third lactational stages). This study was carried out in Al-Tathamin
Dairy plan, Al-Dijyla'a ( Iraqi – Jordan Company) at Waist province. Thirty
dairy cows were selected and divided in two groups, each group contains fifteen
cows depended on lactation stage. Blood sample were collected at monthly
intervals for hematological examination viz; packed cell volume haemoglobin,
milk yield and milk traits such as fat percentage, total solid material, and nonfatty
solid material was measured. The period of study lasted from 1-January
2006 up to 1-september 2006. The result revealed following:
1. Significant decreased in the haemoglobin concentration and packed cell
volume were decreased in the two lactation stages (second and third
lactation stage).
2. Milk yield was non significant decreased during summer as a result in
increased environmental temperature about 14.1co to 36.1co and decrease
relative humidity about 62.2% to 20%.
3. Milk percentage decrease and reach it's minimum level during summer for
the third lactation stage to reach 2.6%.
4. Total solid and total solid non-fatty material of milk percentage increased for
the two lactation stages during spring to reach (12.59%, 9.3%) fore the third
lactation stage and (12.22%, 9.6%) fore the second lactation stage.