مطالعه تاثير سطوح فرآورده هاي فرعي پسته و تانن موجود در آن بر رشد بدن و توليد كرك بزهاي راييني

The effect of different levels pistachio by-products and Its Tannins on growth and cashmere production of Raieni goats.

Thirty - two Raieni cashmere goats (mean live weight 24.922.5kg , 18 months of age) were used in a completely randomized design to study the effect of 4 isonitrogeneous (12.4%CP) and isoenergetic (2.4 ME mcal/kg) diets contaning 0,10,20 and 30% of dried pistachio by-products on growth, cashmere production and follicular characteristic. Goats were housed individually for 174 day experiment. The highest fleece weight (549g) obtained by the diet contained 10% pistachio residual and the lowest obtained by to the control diet (48 lg). Total fleece weight were similar (p>0.05) Among the groups.The highest and the lowest cashmere fibre diameter were 18.41 and 20.31 (Micron) for the diets 10 and 30% pistachio by-products respectively. Total primary and secondary follicle density at the end of experiment for diets contaning 0,10 ,20 and 30% of pistachio by-product were 36.73 ,40.51 ,34.99 and 34.37 (mnr2/skin) respectively. The mean follicle ratio at start and end of experiment were 12.29,13.4,12.55,12.47 respectively which were no significant varried among the treatments (p>0.05). DM intake was no similar among treatments (p>0.05).Although,Daily gains and feed conversion Were no significant differences (p>0.05).Total tannin and phenolic compounds of dried pistachio residual were 10.15 and 15.62 (DM basis).In sacco crude protein degradability in the diets were higher for control than that to the other diets. The CP degradation decreased linearly as tannin content increased. In general results showed that dried pistachio residual can be included upto 30% at the diet dry matter with no any inhibitory effects on growth, intake , skin follicle, cashmere production and safety for goats.