Effects of Using Distillers Dried Cassava Pulp (DDCP) from Ethanol Production on Growth Performance of Growing Thai Native Goats

Abstract

This study was to evaluate the effects of using distillers dried cassava pulp (DDCP) from ethanol production on growth performance of growing Thai Native goats. Twelve Thai Native male goats (14.28±2.60 kgBW and 210.5±69.97 days of age) were used in a randomized complete block design (RCBD). The treatments were the three levels of distillers dried cassava pulp (DDCP) in the concentrate mixes at 0%, 20% and 40% of diet DM. All animals were fed rice straw ad libitum as roughage. The results showed that total dry matter (DM) intake was not significantly different among dietary treatments (538.95, 550.80 and 511.91 gDM/d; P>0.05). Increase in level of DDCP caused decreased linearly (P<0.01) and quadratically (P<0.01) in dry matter digestibility (66.36, 65.69 and 59.60 %) and organic matter (OM) digestibility (67.27, 66.59and 60.65%) and were lowest in goats fed at 40% DDCP. Ruminal ammonia-N (NH3-N) concentration (12.29, 12.31 and 15.84 mg%) was highest in goats fed 40% DDCP and showed that with increasing level of DDCP in the diet caused increased linearly (P<0.01) and quadratically (P<0.01) in ruminal NH3
-N concentration. Moreover, total volatile fatty acid (TVFAs) linearly decreases (P<0.01) (85.03, 83.16 and 75.1mM/l) reflecting increases in level of DDCP. Bacteria [2.25, 2.24 and 1.98 (x 1010 cell/ml)] and protozoa [2.07, 2.07 and 1.84 (x 105 cell/ml)] populations also decreased linearly (P<0.01) and quadratically (P<0.01) as the level of DDCP increased, but, goats fed at 0% and 20% DDCP were not differ. Average daily gain
(ADG) (74.51, 72.77 and 60.15 g/d) was decreased linearly (P<0.01) as the level of DDCP was increased. Moreover, Gain to Feed ratio (G:F) (0.14, 0.13 and 0.12 kg of gain/kg of DMI) decreased linearly (P<0.05) as DDCP increased in the ration and were lowest in goats fed 40% DDCP, but at 0 and 20% DDCP were not differ. It could be concluded that DDCP inclusion in concentrate for growing Thai Native goat at 20%
without any negative effect on growth performance.