Table 6. Effects of different inorganic : organic zinc ratios or combination of low crude protein diet and feed additives on fecal microflora in weaned piglets

Treatment	NC	PC	T1	T2	T3	T4	SE	p-value
Escherichia coli (Log CFU/g)¹⁾	5.241^a	4.986^ab	4.897^ab	5.263^a	5.110^ab	4.742^b	0.139	0.087
Lactobacillus (Log CFU/g)¹⁾	6.969^ab	6.804^b	7.254^a	6.814^b	6.701^b	7.256^a	0.132	0.017

NC, no additional added zinc oxide in diet (negative control); PC, NC+1,000 mg/kg zinc oxide (positive control); T1, NC + inorganic : organic zinc 850 : 150 mg/kg; T2, NC + inorganic : organic zinc 700 : 300 mg/kg; T3, NC + inorganic : organic zinc 500 : 500 mg/kg; T4, 10% reduced crude protein diet + 0.1% essential oil + 0.08% protease + 0.02% xylanase.
Contrast: T4 vs T1, T2, and T3 ( p < 0.05).
Means in the same row with different superscripts differ ( p < 0.05).