The effect of two Kinds of nutral zeolites (Clinoptilolite and Huelandite) on dietary ME and Ileal digestibility of protein, Amino acids and minerals in broiler chicks.

In order to study the effects of different levels of two kinds natural zeolite (Clinoptilolite and Heulandite) on metabolizable energy value, protein, amino acids and minerals digestibility of broiler chicks diets and to study the effects of those diets on relative body organs weight, blood biochemical parameters and performance of broiler chicks three separate experiment conducted after mineralogical and chemical analayze of zeolites. In the first experiment 8 grower diets and 8 finisher diets prepard with using two kinds of zeolite in 4 levels (0, 2, 4 and 6 percent). Metabolizeble energy value (AME, AMEn, TME and TMEn) of those diets were studied with two methods (Precision Feeding and European Reference Procedure). In Precision feeding method 36 Rod Island Red mature cocklers used in 8 treatment with 4 replicat and 4 replicate for determining of endogenous nitrogen losses. In European Reference procedure 252 day old male broiler chicks (ROSS) used in 8 treetment with 4 replicate (7 chicks in each unite) and fasting graup in 4 replicate. In the second experiment digestibility of protein amino acids and minerals in broiler chicks grower and finisher diets studied with two methods. In order to study the effect of two different type of natural zeolite included in broilers dietary ration on the blood biochemical parameters, relative weights of the internal organs and their production potential, a research was conducted in a completely randomized design using 2*4 factorial experiment, consisting of eight treatments each in four replicates. The total numbers of chicks used in this experiment was 640 commercial hybrids of Arboe Acers who 20-day-old chicks of mixed sex were allotted to each replication. The experimental rations of the three rearing steps (starter, grower and finisher) was prepared using the two types of natural zeolites (Clinoptilolite, and Heulandite) in the different levels (0, 2, 4 and 6 percent). The metabolizable energy, protein and the other nutrient content of these rations were similar. The biochemical factors of blood including glucos, cholesterol, tricylceried, calcium, phosphorus, protein, albumim, cratinine and enzymatic activities of aspatet trasaminase (AST) and alkalin phosphatase (APL) were measured at ages 21, 24 and 49 days. The relative weight of the organs ( proventiculus, 96 gizzard, liver, heart, spleen and kidneys ) in the above ages and the characterictics including weight, feed intake, feed convertion ratio were measured weekly and at the end of each rearing steps. In order to study the economical effect of the experimental rations at the end of 3, 6, 7 and 8 th weeks of experiment the feed expenditur for one kg weight and production index in various treatment were calculated and compared with each other. The results of statistical analysis of data obtained indicated that there was no significant effect of types of zeolite on the broilers blood biochemical parameters. Wherase the amount of glucos, protein content and the enzymatic activity of AST and APL were effected by the zeolite levels. By increased the level of zeolite the glucos content decreased (p5%) but the protein content of blood increased significantly (p1%). The effects of zeolite type on relative weight of body organs in two sexes were different. Proventiculus relative weight (p5%), liver, spleen and kidneys relative weight (p1%) in male sex decreased by clinoptilolite. Zeolite type had not significant effect on relative weight of all organs except gizzard that was significant at p1%. Effect of zeolite level on spleen relative weight (p1%) and kidneys (p5%) in female sex were significant. In all rearing steps two type zeolite had not significant effect on broilers performance, but zeolite level in all steps had significant effect on weight gain and in 21, 42 and 49 days had significant effect on feed intake. Weight gain in all steps had increased by increasing the level of zeolite on experimental diets. Zeolite type had not significant effect on production index but zeolite levels in all steps had significant effect on production index and in 49 and 56 days production index in all diet with zeolite were higher than control groups. Keywords : Natural zeolite, Nutrition, Broilers, Blood Parameters, Gut Morphology, Performance.