Effect of using different levels of pistachio by-products silage on composition and blood parameters of Holstein dairy cows

摘要

The goal of this research was?to?study about?the effect of?using pistachio hulls silage in cow's nutrition.?The?initial experiment was about?the?effect of several feed additives on chemical and fermentative characteristic of pistachio hulls silages. This experiment was designed with?5 treatments and 4 replications in each treatment?in a complete randomized design. Additives for preparing pistachio hulls silage were in?thesequence of 1.5% citrus pulp (in base of dry matter), 1.5% ground barley, 1.5% beet pulp, 1.5% molasses and one control treatment without any additives. Silages were sampled for chemical analysis?and fermentative characteristics. Results of?theanalysis showed no significant variation between?the?treatments in?respect?of ash. Inthe?second experiment,?the?application of pistachio hulls silage in?the?nutrition of lactating cows was studied.?Eight lactating cows in one?Latin square designexperiment were used. Treatments included various amounts of pistachio hulls silage replaced with corn silage (in base of dry mater). The results show no significant variation between?the?treatments in milk, blood, rumen factors and digestibility factors that can show pistachio hulls silage that can be replaced with corn silage up to 15% (%dry matter) in dairy cows ration without any significant variation in cows production.