| 摘要 |
1520577 Treatment of ruminant feed NATIONAL CHEMICAL PRODUCTS Ltd 30 April 1976 [2 May 1975] 17596/76 Heading A2B The digestibility and nutritional value of roughage for ruminant feed is improved by adding urea, urease and water and allowing ammonia to be produced by hydrolysis and to permeate the roughage. The urease may be pure or a urease-containing material, e.g. soya or jack bean meal or the rumen contents of slaughtered animals, and the urea: urease weight ratio may be 1:2-3:2. Per 100 wt. parts roughage there may be added a slurry of 2-8 wt. parts urea, 2-6 wt. parts bean meal, 20-50 wt. parts water and optionally 0.06-0.10 wt. parts Ca(OH) 2 and/or 1-2 wt. parts NaOH to retard the hydrolysis reaction. Additives containing a retardant form the subject-matter of Specification 1520578. The roughage may have been cut or milled to a particle size of “-1 inch and, after thorough mixing with the slurry, may be packed in an air-tight zone for 3-4 weeks. The roughage is preferably wheat straw or maize stover, but other straws and hays as well as cotton husks, bagasse, paper, sunflower husks, peanut shells, rice husks, wheaten bran, pollard, citrus pulp, gluten meal, sawdust and various manures are specified. |
