EVALUATION OF NUTRITIONAL SYSTEMS FOR MAXIMIZING MILK PRODUCTION

Abstract

This work was carried out at the Sheep Farm, the Experimental Farm Project, Nuclear Research Centre, Atomic Energy Authority, Inshas. In situ studies were carried out at the Marryot Research Station, Desert Research Centre, Ministry of Agriculture, 35 km south of Alexandria, Egypt. Chemical analysis was carried-out in Dairy Department lab, National Research Centre (NRC), Dokki, Giza, Egypt. This study was carried out to: 1. Evaluate the in situ degradation profiles of OM and CPof some commonly used feedstuffsusing nylon bags. 2. Develop a new advisory program, for milk producers to optimize feeding of animals and milk production through efficient and economic utilization of locally available feed resources. 3. Examine the opportunity for synchronizing ruminal energy and protein digestion in the least cost ration to maximize milk production and profit. This study was carried out in three stages: 1. The first stage [In situ characterization of feedstuffs]. Five sources of concentrates(yellow corn, sugar beet pulp, soya meal, undecorticated cottonseed meal and coarse wheat bran) and two sources of roughages (berseem hay and wheat straw) have been used in this study. The observed patterns of OM and CP degradability for feed ingredients were largely varied and greatly depend on the rumen outflow rate (fraction/h) andthe assumed rate was (0.05/ h).