تعيين ارزش غذايي و بررسي امكان استفاده از سطوح مختلف پوسته پسته خشك شده بر عملكرد پروار بره هاي نژاد افشاري ايران

The effect of different feeding levels of dried pistachio epicarp on fattening performance of Afshari lamb breed of Iran

A study was conducted to investigate the nutritive value of dried pistachio epicarp and possibility of using it in lambs feeding. To investigate nutritive value, chemical analysis, gas production experiment, dry matter and crude protein digestibility by nylon bag method and determination of digestibility by in vivo method and two-stage Tilley and Terry method were taken. Pistachio epicarp included: 1.7 McalME/KgDM and its crude protein, crude fat, calcium and phosphorus were 10.67, 4.50, 0.53 and 0.08 percentages respectively. The and effective degradability of crude protein and dry matter were 74.06 and 76.14 percentage respectively and digestible organic matter in dry matter was 46.02 percentage. To investigate the possibility of using PE in animal feeding and determination of optimum level in diet, seven groups often male lambs (age 6 months and average weight 35.9±1.21 Kg), were fed for 90 days, iso-caloric, iso-nitrogenous diets, containing either no added pistachio epicarp (control) and added levels 10, 15,20,25,30 and 35 percentage pistachio epicarp in rations. Feed conversions for the treatments were 8.56, 8.23, 8.60, 8.54, 8.60, 9.18 and 9.23 respectively and no significant differences between groups I to 5 were observed. After 90 days feeding, the lambs were slaughtered and dry matter intake, daily gain, body condition score, feed conversion and carcass composition parameters were measured. The results showed that feeding lambs with pistachio epicarp up to 25 percentage of total dry matter intake did not affect lambs performance, feed conversion, body and meat composition and health of animals significantly.