تأثير إضافة محتوى الكرش للأبقار على صفات الزيادة الوزنية والمعدلات النسبية والنوعية لأسماك الكارب العشبي Ctenopharyngodon idella

Abstract

The study was conducted in the fish laboratory, College of Agricultural Engineering Sciences, University of Baghdad, with the aim of using the contents of the rumen of cows supported with the prebiotic as a diet for grass carp fish. In the research, 190 fish were used, with an average starting weight of 40 g. 15 fingerlings, the fish were fed on four types of rations equal in protein, after crushing and grinding the materials and adding the contents of the rumen at rates of 10, 15and 20, fortified with a prebiotic of 2 g/kg, except for the control ration free of addition. The results of the research indicated that the second treatment had a significant superiority over all treatments in terms of body weight rates, weight gain, relative and specific weight rates, feed conversion ratio, feed conversion efficiency, and apparent digestion coefficient, followed by the third treatment, then the fourth treatment, and for all durations of the experiment. The results also indicated that the fourth treatment had a significant superiority in the characteristic of the time for the appearance of droppings after 10 h had passed from the presentation of the diet, followed by the third treatment and then the second treatment .The results also indicated that feed consumption increased significantly for the second treatment, followed by the third treatment, and then the fourth treatment.