The Effects of Chemical Treatment With Different Ratios of Hydrochloric Acid, Hidrochloric Acid + Urea and Urea on The Nutritive Value and Digesti- bility of Wheat Straw in Angora Goats
2 F. Ü. Veteriner Fakültesi, ELAZIĞ
3 Hayvan Sağlığı Nükleer Araştırma Enstitüsü, Lalahan / ANKARA - n this trial, the effects of chemical treatment on the composition, dry matter intake and digestibility of wheat straw were investigated using four Angora goat bucks. Wheat straw was either untreated (S) or treated with 20 % hydrochloric acid (S+20-HCI), 30 % Hydrochloric acid (S + 30 -HCI, 20 % Hydrochloric acid + 4 % Urea (S+20-HCI+U), 30 % Hydrochloric acid + 4 % Urea, (S + 30 + HCI + U), and 4 % Uresa (S + U).
Composition of straw in the respective groups was 3.01, 3.08, 3.17, 16.29, 16.33, and 9.82 % for crude protein; 80.28, 65.44, 65.38, 58.18, 56.92 and 78.65 % for NDF; 8.87, 9.57, 9.64, 9.76, 12.48 and 9.85 % for ADL; 40.20, 40.01, 37.92, 36.36 and 40.91 for cellulose; 29.57, 15.66, 15. 73, 1 0.49, 8.08 and 27.89 % for hemicellulose, respectively. There was no difference between urea treated groups in rate of urea hydrolysis.
Dry matter intake in the respective groups was found, 453.9, 377.3, 421.3, 601.5, 376.6 and 330.5 g. Nutrient digestibility increased in all treated groups (P<0.001), but varied according to chemicals, concentration and the method of treatment. Group S + 30 -HCI had higher digestibility rate than S + 20 -HCI, and group S + U had higher digestibility than S + 30 -HCI; S + 20 -HCI + U and S + 30 - HCI + U had higher digestibility than S + 20 -HCI and S + 30 -HCI (P<0.001). Energy levels increased in all treatment groups.
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