Table 2.

Aflatxoin B₁ concentrations in feeds^a

Item	Year	NO. of samples	Positive samples, μg/kg				Numbers of samples in the range, μg/kg					The rate of over standard, %
			%	Mean	Medain	Maximum	< 0.5	0.5–10	10–30	30–50	> 50
Corn	2018	229	95.6	4.4	1.9	221.0	10	210	5	0	4	1.7
	2019	249	81.9	3.9	2.1	221.0	45	197	6	0	1	0.4
	2020	215	98.1	3.7	3.4	11.8	4	208	3	0	0	0
Dried distillers grains with soluble	2018	82	100	7.9	5.2	45.8	0	55	26	1	0	0
	2019	22	100	7.8	6.2	17.9	0	14	8	0	0	0
	2020	23	95.7	4.9	4.2	11.2	1	21	1	0	0	0
Corn germ meal	2018	28	100	7.0	3.5	40.2	0	24	2	2	0	0
	2019	23	100	7.1	3.3	22.4	0	16	7	0	0	0
	2020	10	100	7.5	4.6	30.8	0	8	1	1	0	0
Corn bran	2018	33	100	9.4	3.6	68.7	0	26	4	2	1	3.0
	2019	19	100	4.3	3.3	17.9	0	18	1	0	0	0
	2020	16	100	8.6	7.3	29.3	0	11	5	0	0	0
Corn gluten meal	2018	21	100	5.0	2.5	27.9	0	19	2	0	0	0
	2019	4	100	7.8	3.9	21.1	0	3	1	0	0	0
	2020	1	100	15.6	15.6	15.6	0	0	1	0	0	0
Wheat	2018	110	99.1	2.8	2.7	7.0	1	109	0	0	0	0
	2019	34	97.1	3.4	3.2	8.2	1	33	0	0	0	0
	2020	27	100	3.6	2.9	11.4	0	26	1	0	0	0
Wheat middling	2018	34	100	2.7	2.8	4.1	0	34	0	0	0	0
	2019	46	100	6.5	2.8	77.5	0	43	1	0	2	4.3
	2020	28	100	3.1	3.1	6.4	0	28	0	0	0	0
Wheat bran	2018	148	100	6.1	3.7	57.4	0	125	20	2	1	2.0
	2019	86	100	4.3	3.4	12.3	0	81	5	0	0	0
	2020	41	100	4.5	3.5	25.5	0	38	3	0	0	0
Soybean meal	2018	118	100	2.3	2.1	5.7	0	118	0	0	0	0
	2019	23	100	2.8	2.3	6.1	0	23	0	0	0	0
	2020	36	100	2.7	2.6	7.5	0	36	0	0	0	0
Wheat flour	2019	4	100	3.2	3.2	5.0	0	4	0	0	0	0
	2020	13	100	3.0	3.3	5.5	0	13	0	0	0	0
Soybean bran	2018	1	100	1.8	1.8	1.8	0	1	0	0	0	0
	2019	3	100	3.2	3.8	4.2	0	3	0	0	0	0
	2020	19	100	4.1	3.4	9.3	0	19	0	0	0	0
Rapeseed meal	2018	24	100	8.5	6.8	14.9	0	16	8	0	0	0
	2019	4	100	7.3	6.1	12.2	0	3	1	0	0	0
	2020	5	100	3.7	3.6	5.6	0	5	0	0	0	0
Peanut meal	2018	27	100	23.1	13.7	59.7	0	9	9	5	4	14.8
	2019	5	100	27.4	32.0	40.7	0	1	1	3	0	0
	2020	9	100	12.7	13.6	21.1	0	4	5	0	0	0
Fish meal	2018	67	100	1.2	1.1	2.5	0	67	0	0	0	0
	2019	12	100	1.2	1.2	1.7	0	12	0	0	0	0
Grass grain	2018	68	100	7.9	6.2	45.7	0	61	4	3	0	4.4
	2019	41	100	4.1	3.8	9.2	0	41	0	0	0	0
	2020	16	100	5.3	5.1	14.0	0	15	1	0	0	0
Unite bran	2018	12	100	6.3	6.3	7.8	0	12	0	0	0	0
	2019	14	100	4.0	3.5	9.2	0	14	0	0	0	0
	2020	15	100	3.4	2.9	11.8	0	14	1	0	0	0
Rice bran	2019	4	100	7.5	5.6	15.3	0	3	1	0	0	0
	2020	14	100	3.7	3.3	7.4	0	14	0	0	0	0
Complete pig feed	2018	317	100	4.9	3.2	59.7	0	295	17	1	4	2.5
	2019	214	100	4.0	2.9	20.9	0	197	17	0	0	0.5
	2020	89	100	3.5	3.0	12.3	0	86	3	0	0	0
Complete poultry feed	2018	248	99.6	4.5	3.4	57.4	1	231	15	0	1	1.2
	2019	144	100	5.7	4.3	31.5	0	127	15	2	0	2.8
	2020	179	100	4.6	4.0	15.6	0	166	13	0	0	0
Complete ruminant feed	2018	117	100	8.5	3.8	77.5	0	99	9	3	6	8.5
	2019	47	100	15.4	10.8	44.3	0	22	15	10	0	40.4
	2020	62	100	4.7	4.2	12.7	0	59	3	0	0	0

^aPositive samples are defined as those with aflatxoin B₁ ≥ 0.5 μg/kg (LOD)