TY - JOUR T1 - Comparison of Cottonseed meal and Fish Meal Fed to Dairy Cows Receiving Rapidly Degradable Diets in Holstein Cows TT - مقایسه پودر ماهی با کنجاله پنبه دانه در جیره‌های با تجزیه‌پذیری سریع در گاوهای شیرده هلشتاین JF - JSTNAR JO - JSTNAR VL - 9 IS - 2 UR - http://jstnar.iut.ac.ir/article-1-345-en.html Y1 - 2005 SP - 109 EP - 118 KW - Fish meal KW - Cottonseed KW - Holstein KW - Rapid degradability N2 - To compare the relative value of the fish meal and the cottonseed meal in highly fermentable diets (40% forage and 60% concentrate with), eight cows were assigned randomly to diets with 0, 1.5, 3 and 4.5 percent of the fish meal. In the first experiment, the degradability of dry matter and crude protein of the fish meal, the cottonseed meal and concentrate in diets was estimated with different incubation times (0, 4, 8, 12 and 24 h) with fistulated Ghezel sheep fed at maintenance level. The effective degradability of dry matter and the crude protein of fish meal was significantly lower than cottonseed meal (p M3 ER -