Hastening urea treatment of rice straw using Gliricidia sepium (Jacq.) Kunth ex Walp or poultry manure and feeding value of treated straw with limited supplementation to dairy heifers
1985
Lohani, M.N.
Adding DPM (dried poultry manure)/GL (Gliricidia sepium leaf) to urea treated straw increased the pH after 3 days (P0.05). Urea treatment improved crude protein content of straw (P0.05), which increased further by the inclusion of DPM/Gl (P0.05) with the exception of GL for 21 days. An improvement of more than 10 percentage units in in vitro digestibility of straw was achieved by urea treatment for 21 days (P0.05) Inclusion of DPM/GL produced similar result as early as 3 days. DPM groups showed better organic matter digestibility than GL group. Urea treatment improved in vitro digestibility of dry matter and organic matter (IVDMD and IVOMD) as well as in vivo apparent dry matter digestibility (IVADMD) of straw (P0.01), estimated using acid-insoluble ash marker. Supplementation significantly improved IVADMD (P0.01). Urea-treated straw increased blood urea-N content of heifers (P0.01). Treated straw with O supplementation produced highest adjusted value of urea-N 3 hours after the animals were fed (P0.05). Total serum protein was not affected by treatment or supplement. It was more economical to improve feeding value of rice straw by urea treatment than by concentrate supplementation
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