Abstract
A total of 120 finishing pigs with an average initial body weight of 49.72±0.08kg (mean±SD) were used in a 10weeks trial. Pigs were randomly allotted into one of four dietary treatments (6 replicate pen/treatment, 5 pigs/pen). The nutritional dietary treatments were corn, soy bean meal, palm- kernel meal, and rapeseed meal based basal diets supplemented with 0, 0.05, 0.10, and 0.20% of Achyranthes japonica extract (AJE). Dietary inclusion of AJE supplementation had trend to increase the body weight and average daily gain of pigs at week 10 and the overall experimental period, respectively. The graded level of AJE supplement had increase the total track digestibility dry matter (p=0.067) only at week5 while nitrogen and energy digestibility (p<0.05) was linearly increased at both weeks 5 and 10. During week 10, pigs fed with an increased level of AJE supplementation had linearly increase (p < 0.05) fecal Lactobacillus counts. In addition, AJE supplementation in the diet of finishing pigs had linearly decreased (p > 0.05) NH3 emission of gas and trend to decrease total mercaptans during week 10. Dietary inclusion of AJE supplement resulted in a linear increase in the blood protein concentration level. Moreover, drip loss was linearly reduced on day 5 and day 7 (p > 0.05) post slaughter in finishing pigs fed with gradually increased levels of AJE supplementation. During weeks 5 and 10, pigs fed with graded levels of AJE supplementation had linearly increase (p<0.05) the backfat thickness and lean meat percentage. Therefore we conclude that dietary inclusion of AJE with palm kernel meal and rapeseed meal could be benificial to enhance the growth performance, nutrient digestibility, fecal microbial, blood prolife, meat quality and reduced fecal gas emission in finishing pigs.
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