Effect of rumen-protected methionine and / or lysine supplementation to the ration on nutrients digestibility and on some rumen parameters of male balady goats [electronic resource].

Includes references.

Four mature Balady male goats were used in 4 x 4 Latin square designed experiment. The feeding treatments were (I) control diet, (2) control diet + 7 g Smartamine TM (rumen protected methionine), (3) control diet + 21 g rumen protected lysine, (4) control diet + 7 g Smartamine + 21 g rumen protected lysine. The control diet was consisted of concentrate feed mixture: rice straw (70% : 30%, on dry matter basis). Smartamine TM M and protected lysine (ration 4) supplementation increased (P<0.05) the dry matter intake (DMI), digestibility of nutrients and ruminal content of total volatile fatty acids (TVFA's), total nitrogen and true protein as compared to the control. Smartamine TM M supplementation alone (ration 2) increased (P<0.05) the DMI, digestibility of nutrients and ruminal content of TVF A's, total nitrogen and true protein as compared to the control. Protected lysine supplementation (ration 3) increased (P<0.05) the DMI and digestibility of nutrients, except ether extract and nitrogen-free extract. Rumen protected lysine supplementation also increased the ruminal content of TVFA's, total nitrogen and true protein as compared to the control. Blood serum total protein content was increased (P<0.05) in treated groups, while the concentration of glucose and total lipids were increased (P<0.05) with ration 4, and slightly higher (P>0.05) with ration 2 and ration 3 compared with control. The highest DMI, nutrients digestibility, TVF A's, total nitrogen and true protein in ruminal fluid, and blood serum protein, glucose and total lipids were obtained with Smartamine™ M + protected lysine supplementation which was followed by Smartamine than protected lysine supplementation. In conclusion, Smartamine™ M+ protected lysine supplementation to rations of goats had beneficial effects on nutrients digestibility and dietary nitrogen utilization. Moreover, it could improve rumen fermentation and blood serum levels of total protein, glucose and lipids.

Summary in Arabic.

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