Nutrient digestibility and nitrogen balance in finishing pigs fed diets containing ground wheat straw
2006
Falkowska, A.,University of Warmia and Mazury, Olsztyn (Poland). Dept. of Animal Nutrition and Fodder Science | Falkowski, J. | Kozera, W. | Bugnacka, D.,University of Warmia and Mazury, Olsztyn (Poland). Dept. of Pig Breeding
3 complete diets fed to finishing pigs were analysed. Control diet (I) was made of soybean meal, ground barley, ground wheat and vitamin-mineral supplements. Experimental diets II and III were supplemented with 10 and 15 percent of ground wheat straw respectively. Nutrient digestability and nitrogen balance were determined by the balance method on 12 Polish Landrace fatteners with average initial body weights of 102.3 kg, divided by the analogue method into three feeding groups, each of four pigs. The experiment was divided into a 10-day preliminary period and 5-day experimental period. Experimental diet supplementation with ground wheat straw resulted in an increase in crude fiber content, from 2.76 percent (diet I - control) to 5.36 percent (diet II) and 8.69 percent (diet III). It was found that a higher crude fiber concentration in diets, caused by the addition of 15 percent of ground wheat straw (III), significantly reduced the digestibility of crude protein, NDF and hemicellulose. A statistically significant decrease in the digestibility of N-free extractives and gross energy was observed in the case of both the diet with 10 percent and 15 percent of ground wheat straw (group II and III). No significant differences were found in the digestibility of crude fat, crude fiber, ADF, cellulose, and in daily nitrogen retention in fatteners
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