University of Khartoum

Effect of poly ethylene glycol addition on Nutritive Value and Gas production parameters of four browsing Trees.

Effect of poly ethylene glycol addition on Nutritive Value and Gas production parameters of four browsing Trees.

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Title: Effect of poly ethylene glycol addition on Nutritive Value and Gas production parameters of four browsing Trees.
Author: Abdullah, Ahmed
Abstract: Nutritive value of four browsing trees (Acacia.torrtlis , Ziziphus.spinachristi , Acacia.mellifera and Acacia.seyal ) leaves and pods were evaluated by estimating chemical composition and in vitro gas production techniques.The chemical composition for both leaves and pods were significantly different (p<0.01 ) among the species . Crude protein (CP) contents ranged from 16.0 to 24.1 %. Acid detergent fibre (ADF) and neutral detergent fibre (NDF) contents varied within species in the range 18.5- 43.8 % and 36.1 - 72.3% respectively . Total condensed tannin (TCT) contents ranged from 0.5- 6.2%. TCT were negatively correlated with fraction (b) and (a +b) whereas ADF were negatively correlated with most of the estimated parameters . The gas production parameters significantly varied among the species . There were also significant differences in terms of cumulative gas production , invitro organic matter digestibility (IOMD) and calculated metabolizable energy (ME). The addition of poly Ethylene Glycol (PEG) significantly increased (p<0.01 ) the gas production from both soluble and insoluble fraction (a) and (b) , invitro organic matter digestibility (IOMD) and metabolizable energy (ME) . The IOMD values of leaves and pods without PEG ranged from viii 39.7to 64.5 % and with PEG ranged from 37.9 to 80.0 %. While the ME content without PEG ranged from 5.9 to 10.6 MJ kg/DM and the ME content with PEG ranged from 5.7 to 13 MJ kg/DM The best improvement in gas production, invitro organic matter digestibility (IVOMD) and metabolizable energy (ME) were observed with 50% PEG w/w. Generally this improvement indicate the negative effect of tannins on digestibility.
URI: http://khartoumspace.uofk.edu/handle/123456789/8510
Date: 2015-04-08


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