| Popis: |
For proper function of many metabolic processes trace element and mineral intake is important. The objective of this experiment was to evaluate the addition of a dacitic tuff breccia (DTB), a hydrated sodium calcium aluminosilicate, on nursery pig growth and nutrient digestibility. Dietary treatments were: 1) Control (CON) and 2) CON+0.50% DTB (DTB). Pigs (7.73±0.205 kg; 26 d of age) were individually housed and fed for 20d (n=24, 12/trt). Nutrient digestibility was evaluated using individual metabolism pens for 3d total collection of feces and urine during the last week of evaluation. DTB had no effect on pig performance during week 1 (P >0.28). Week 2 ADG (128 versus 302 g/d; P=0.02), BW (10.63 versus 11.77 kg; P=0.03), and G:F (0.275 versus 0.608; P=0.02) were improved for DTB compared to CON fed pigs. Week 3 ADFI was greater for DTB fed pigs compared to CON (642 vs 768 g/d; P=0.01). Overall (d0-20), DTB fed pigs had greater ADG (279 versus 352 g/d; P=0.04), final BW (13.3 versus 14.8 kg; P=0.04), and numerically greater ADFI (497 versus 558 g/d; P=0.16) and G:F (0.562 versus 0.624; P=0.22) compared to CON. During the collection period, ADG was numerically increased (396 versus 427 g/d; P=0.69) and ADFI (544 vs 668 g/d; P=0.03) was greater for DTB versus CON fed pigs. Nutrient digestibility was not affected by inclusion of DTB in the diet (P >0.05). Digestibility coefficients for CON and DTB, respectively, were: 0.863 and 0.856 for DM; 0.842 and 0.842 for digestible energy; 0.824 and 0.814 for nitrogen; 0.701 and 0.667 for phosphorus; 0.873 and 0.816 for sodium; 0.481 and 0.431 for zinc; 0.517 and 0.458 for iron; and 0.438 and 0.392 for manganese. DTB in nursery pig diets improved growth performance and tended to improve feed intake, but had no effect on nutrient digestibility. |
