Abstract
ABSTRACTThe objective of this study was to determine the effect of adding different levels of pistachio by-product (PB) on the fermentation quality, nutritive value and in vitro methane (CH4) production of corn silage. For this purpose, silages were prepared in the 1.5 l glass jars by adding with 2%, 4%, 6%, 8% and 10% pistachio PB (as a dry matter basis). The results showed that addition of 6%, 8% and 10% pistachio PB levels decreased (P < 0.05) silage acetic acid content. Increment of pistachio PB level increased (P < 0.05) silage propionic acid content, but it decreased (P < 0.05) ammonia nitrogen values. Addition of all levels of pistachio PB decreased (P < 0.05) gas production (from 251.70 to 196.76 ml/g dry matter (DM)), in vitro organic matter digestibility (from 70.26% to 61.62%) and metabolizable energy (from 9.69% to 8.27 MJ/kg DM) values. Similarly, increment-level pistachio PB decreased (P < 0.05) of in vitro methane production level. As a result, pistachio PB might have a potential usage value as silage additive when undesired ruminal methane production is aimed to be suppressed by ruminant.
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