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Reducing Greenhouse Gas Emissions from Livestock and Soils |
Four crossbred castrated male pigs, weighing on average 25 kg were allotted at random to 4 diets within a 4*4 Latin square design, to study effects of level of rice distillers’ residue (0, 10, 20, 30 % in DM) in combination with Taro silage (Colocasia esculenta) and rice bran on digestibility and N retention of growing pigs. The trial was conducted in the experimental area of Souphanouvong University, in Luang prabang province, Laos, from 3rd April 2011 to 12th May 2011.
Daily retention of N (Figure 1) and N retained as percent of N digested (Figure 2) increased linearly with replacement of Taro silage by rice distiller's residue and rice bran. It appears that the biological value of the distiller’s residue is superior to that of Taro silage or that the distiller’s residue provides some other nutrient – possibly a probiotic effect of the yeast.
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| Figure 1. N retention in pigs fed taro silage and rice bran, or mixtures of the two, with increasing levels of rice distillers’ residue (corrected for differences in N intake) | Figure 2. N retention as percent of N digested in pigs fed taro silage and rice bran, or mixtures of the two, with increasing level of rice distillers’ residue |