The Predict Of The Productional and Physiological Performance of Trukish Awassi Ewes Depending on Heat Tolerance Coefficient and Temperature Humidity Index

Abstract

The research was this study in the sheep farm which belong to department of animal production resources- College of agriculture –Abugraib during the period 1st June until 1st September 2012. For a sample of 50 ewes aiming to predict the production performance of Turkish Awassi ewes through heat tolerance Coefficient as well as heat and humidity indices. Results illustrated a high significant regression of daily milk production at optimum heat temperature, There was a negative significant regression (p<0.05) of daily milk production on mean optimum and minimum temperature. Mean while that of the total milk production regression at the optimum temperature was negative (p<0.01). Results of present study revealed that regression of fat percent of milk at the optimum temperature was highly significant. Regression of milk protein at optimum degree was highly significant, as well. A significant regression of lactose at optimum degree. Concerning regression of birth weight at optimum degree was negative significant, and it was recorded a significant. Regression of the two traits which included weight during weaning and daily weigh gain at optimum degree. Regression of daily and total milk production on heat tolerance coefficient was negative and highly significant and significant on heat and humidity indices. Regression of milk fat and protein on heat tolerance coefficient with heat and humidity indices positive and significant. Regression of weight at birth , weaning and daily gain it have been seen highly significant on heat and humidity indices.