ISSN 2756-3685
International Journal of Enology and Viticulture Vol. 5 (6), pp. 001-005, June, 2018. © International Scholars Journals
Full Length Research Paper
Estimation of the nutritive value of grape pomace for ruminant using gas production technique
Afshar Mirzaei-Aghsaghali1, Naser Maheri-Sis2*, Hormoz Mansouri3, Mohammad Ebrahim Razeghi4, Abdolahad Shaddel telli2 and Abolfazl Aghajanzadeh-Golshani2
1Department of Animal Science, Islamic Azad University, Shabestar Branch, Shabestar, Iran.
2Department of Animal Science, Islamic Azad University, Shabestar Branch, Shabestar, Iran.
3Animal Science Research Institute, Karaj, Iran.
4Agricultural and Natural Resources Research Center, Urmia, Iran.
Accepted 10 May, 2018
Abstract
The aim of this study was to determine the chemical composition and estimation of nutritive value of white grape pomace (WGP) using IN VITRO gas production technique. Fermentation of WGP samples were carried out with rumen fluids obtained from three mature cannulated steers. The samples were collected from a factory in Urmia, Iran. The amount of gas production for WGP at 2, 4, 6, 8, 12, 24, 48, 72 and 96 h were measured. The results showed that the crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) and non-fibrous carbohydrate (NFC) contents were 17.27, 59.5, 52.5 and 13.5%, respectively. Gas production at 24 h and potential gas production (a + b) were 30.92 and 79.89 ml, respectively. The organic matter digestibility (OMD), metabolizable energy (ME) and short chain fatty acid (SCFA) contents were 50.50%, 7.4 MJ kg-1 DM and 0.69 mmol, respectively. The net energy for lactation (NEL) content was 3.31 MJ kg-1 DM. According to the results of this study, it seems that WGP could be used as a valuable food industrial by-product in ruminant nutrition.
Key words: Nutritive value, gas production, grape pomace, short chain fatty acid, metabolizable energy.