Effects of replacement of sesame meal with soy bean meal on intake, digestibility, rumen characteristics, chewing activity, performance, and carcass composition of lambs

The best sources of plant protein legum forage (beans) are oilseeds and meals. Plant protein supplements usually are high in rumen degradability. Soybean, which is assumed to be worth 100 with 41 to 45 percent crude protein is the most abundant and highest quality plant protein supplement. And contains a high energy and protein and amino acid pattern is relatively good. It is contain high lysine and low methionine. Sesame meal is sesame seed oil extraction operations (Sesamum indicum) with more than 44% crude protein and contain appropriate amounts of essential amino acids especially arginine, leucine and methionine. However, little attention to the use of sesame meal has been fed to sheep. The purpose of this study The effect of substitution soybean meal with sesame meal on growth performance, feed intake, nutrient digestibility, average daily gain, carcass characteristics and meat quality in growing lambs.
This study was conducted to investigate the effect of replacing levels of soybean meal by sesame meal on feed intake, digestibility, performance and carcass characteristics of feedlotting lamb in a completely randomized design with 5 treatments including 1, 2, 3, 4 and 5 treatments with replaced 0, 25, 50, 75 and 100% sesame meal by soybean meal in4 replications for 90 days. Animals were weighed every 15 days, feed intake measured daily, and total collection of faeces was done for 50 to 55thendigestibility of dry matter and nutrients were determined. At the end of the experiment, two replications of each treatment are slaughtered and their carcasses were evaluated.
Daily feed intake, body weight, daily gain and feed conversion, time feed intake, rumination and chewing activity there were no significant differences among the treatments. The apparent digestibility of dry matter, crude fat and organic matter, difference between treatement was statistically significant. Treatment 4 had the highest apparent digestibility for DM between treatments. By increasing sesame meal the passage rate of solid mater in the rumen reduced and in contrary the ruminal mean retention time increased comparision to treatment 1. Full replacement of sesame meal at treatment 5 significantly increased the N-NH3. In addition, a significant dofferent were observed in the breast, blood and, kidney fat weight and body length of the hip bone among treatments.
The results showed that the diet with 75% sesame meal situated with soybean meal as a protein source without significant effect improved digestibility, average daily gain, feed conversion ratio and the performance. In general, sesame meal can replaced at any level with soybean meal in the ration of fattening lambs without harmful effects on the parameters of production and fattening performance.