tailieunhanh - BALANCED FEEDING FOR IMPROVING LIVESTOCK PRODUCTIVITY

Assessing the diversity of AnGR is made more difficult by the existence of many animal populations that are not assigned to any recognized breed. Even though parts of these “non-descript” populations are known to be multiple crosses of recognized breeds, some animals may belong to (relatively) homogenous groups distinguishable from neighbouring populations on the basis of identifiable and stable phenotypic characteristics (among which may be unique and valuable attributes) that warrant their being distinguished as separate breeds. Determining whether or not this is the case is one of the roles of phenotypic charac- terization and is a prerequisite for effective assessment. | ISSN 0254-6019 173 FAO ANIMAL PRODUCTION AND HEALTH BALANCED FEEDING FOR IMPROVING LIVESTOCK PRODUCTIVITY Increase in milk production and nutrient use efficiency and decrease in methane emission Cover photographs Left image FAO Ami Vitale Centre image . Garg Right image FAO Asim Hafeez 173 FAO ANIMAL PRODUCTION AND HEALTH paper BALANCED FEEDING FOR IMPROVING LIVESTOCK PRODUCTIVITY Increase in milk production and nutrient use efficiency and decrease in methane emission FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Rome .