Determination of feed value of chemically treated sun-dried grape pomace

Year 2024, Volume: 9 Issue: 2, 270 - 276, 31.08.2024

Kadir Emre Buğdaycı , Derya Merve Karagöz , Fatma Karakaş Oğuz , Mustafa Numan Oğuz , Esra Çağan Ulusan , Aykut Nacak

https://doi.org/10.24880/meditvetj.1541140

Abstract

This study aimed to elucidate the effects of various chemical treatments on the in vitro dry matter digestibility (IVDMD) and concomitant feed value of dried grape pomace (DGP). Sun-dried grape pomace, derived from grapes processed in Denizli, Türkiye province was used in the experiment. One control group and three treatment groups were established, each with eight replicates. The first, second and third experimental groups were treated with 1.5% ammonia (NH3), 3% urea (CH4N2O) and 3% sodium hydroxide (3%) (NaOH), respectively. The dry matter content was set at 50% for all groups. The control group received no additional chemicals. All groups were kept in airtight, closed plastic bags at room temperature for one week. Adding NH3 and CH4N2O significantly improved crude protein levels (24.45 and 19.84%, respectively) and in vitro protein degradability (59.84 and 65.69%, respectively) in the experimental groups (p<0.001). Treatment with CH4N2O did not exert the same deleterious effect on the ether extract concentration of desiccated grape pomace (p<0.004) as treatment with NaOH. Moreover, relative feed value declined significantly more after NaOH treatment compared to treatments containing nitrogen (p<0.001). Additionally, NaOH treatment yielded the lowest in vitro protein degradability of DGP at 40.32% (p<0.001). With an in vitro dry matter degradability of 47.18%, the findings indicate that among the chemical treatments investigated, application of NH3 resulted in the lowest degradability value (p<0.001). Consequently, it can be inferred that the feed value and digestibility of desiccated grape pomace are highly influenced by the nitrogen concentration or basic nature of the supplemental chemical compounds.

Keywords

ammonia digestibility, grape pomace, sodium hydroxide, urea

Ethical Statement

The research is not an animal experiment, ethics committee authorisation is not required.

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