Determination the metabolizable energy valuse of all feedingstuffs of practical importance to the Khorasaninan poultry industry.

In 1995 this design was initiated. The ohjective of wich was to obtain Metabolizable Energy (ME) Values for repesentative samples of all feedingstUffs of practical importance to the Khorasanian poultry industry. Several experiments were conducted to determine the AME and AMEn values of 6 variety of wheat (Bezostaia, Fallat, Ghods, Navid, Omid and Sandari), 3 variety of barley (Arivat, Star and Valfajr), 2 variety of corn, triticale, wheat grain screening (W.G.S) Grades and 2, 3 type of fish meal, animal and poultry by-product meal, Behshahr soybean meal, 2 types of mechanical extracted cotton seed meal, sesame meal, sunflower meal, cotton seed oil, poultry fat and 5 variety of sorghum (Sorghum, Tamaran, duratom, Broon and N.K).In these experiments wc used Farell (1978) method with two precedure, single ingredient and practical diet replacement assay. The animal used were 120 single comb White Leghorn roosters. Roosters were housed In Individual Cages in an environmentaly-controlled room. Temperature was 18-23°c. In the first we trained rossters to consume daily feed allowance within one hour. The birds were strayed for 24-48 hr then fed experimental feedstuffs for 1hr. Palatble feeds such as wheats, barelies, corns, sorghums, and wheat grain screening were fed alone and other feeds were substituated With a basal diet. Basal diet were composed of practical feed ingredients. The nature of the basal diet varies according to the class of feedingstufs being assayed. For low protein materials such as oils the basal diet was high protein and for high protein materials used a corn hasal diet. A Total excreta collection method was employed for all of feedstufs, but for sunflower meal used as chromic oxiide indicatore method. The total amount of feed consumed was recorded and the excreta voided during 24, 30, 32, 36 or 48 hours after feeding were collected. Collection period was different depending on feeds and amount of feed consumption. Excreta were dried at 75°c in an airconvection oven. Excreta were equilibrated with atmosphoric moisture perior to the weighing, grinding, and anlysis. Sample of the feeds and excreta from each bird were analyzed for nitrogen and gross energy.