TABLE 2.

Chemical composition, fermentation products, and mycotoxin concentration of purple prairie clover ensiled without or with polyethylene glycol in terminal silage and after 7 and 14 days of aerobic exposure

Item	Terminal silage (n = 5)				Aerobic exposure silage (n = 4)
	Day 0		SEM	P	Day 7		SEM	P	Day 14		SEM	P
	Control	PPC-p			Control	PPC-p			Control	PPC-p
Chemical composition (g/kg DM)
Dry matter (g/kg forage)	305.94	311.76	4.77	0.375	387.51	388.96	5.10	0.848	376.59	389.44	3.80	0.054
Organic matter	911.34	910.25	1.40	0.599	912.56	913.64	0.70	0.383	902.89	901.93	2.94	0.826
Neutral detergent fiber	437.43	428.28	13.55	0.637	437.11	438.40	4.65	0.850	527.00	509.77	20.08	0.545
Acid detergent fiber	357.21	366.93	8.27	0.430	369.04	380.78	5.76	0.199	442.74	420.33	13.06	0.292
Acid detergent-insoluble nitrogen	9.03	7.76	0.13	<0.001	8.85	6.32	0.12	<0.001	11.26	10.26	1.36	0.658
Neutral detergent-insoluble nitrogen	7.45	8.21	0.44	0.270	11.92	10.30	0.60	0.095	13.06	13.32	1.06	0.878
Acid detergent lignin	70.56	82.09	9.17	0.400	103.07	98.62	6.29	0.622	148.78	132.49	8.60	0.252
Water-soluble carbohydrates	2.40	0.30	0.12	<0.001	0.69	0.47	0.06	0.034	0.51	0.42	0.09	0.482
Total N	28.16	28.24	0.06	0.457	28.62	28.32	0.18	0.363	27.82	28.45	0.83	0.569
Soluble N	0.29	0.45	0.02	<0.001	0.26	0.45	0.02	<0.001	0.22	0.42	0.02	<0.001
Nonprotein N	0.35	0.50	0.02	<0.001	0.24	0.38	0.01	<0.001	0.16	0.35	0.02	<0.001
Extractable condensed tannins	27.4 ± 1.5a	NDb			4.0 ± 0.5a	ND			ND	ND
Fermentation products (g/kg DM)
pH	5.02	4.61	0.01	<0.001	4.98	4.66	0.02	<0.001	8.81	8.96	0.18	0.586
Lactic acid	40.99	91.04	5.36	<0.001	27.13	63.48	2.57	<0.001	1.92	3.14	0.40	0.161
Total VFA	15.59	26.84	1.70	0.002	22.38	36.12	2.55	0.009	1.85	1.60	0.46	0.730
Acetic acid	14.82	25.38	2.68	0.022	21.78	33.93	2.58	0.016	1.14	0.88	0.32	0.635
Propionic acid	0.17	0.97	0.06	<0.001	0.17	1.59	0.12	<0.001	0.05	0.10	0.02	0.184
Butyric acid	0.38	0.36	0.01	0.408	0.33	0.41	0.05	0.291	0.29	0.34	0.01	0.087
Minor VFAc	0.28	0.17	0.04	0.101	0.12	0.16	0.01	0.087	0.26	0.30	0.04	0.539
Succinic acid	5.54	2.60	0.39	<0.001	3.72	1.84	0.32	0.006	1.20	0.66	0.48	0.453
Lactic acid:acetic acid ratio	2.49	3.62	0.18	0.003	1.28	1.80	0.17	0.067	1.09	3.60	0.20	0.001
Ammonia N	2.70	3.74	0.14	<0.001	2.10	3.26	0.18	0.004	2.13	4.22	0.25	0.001
Mycotoxin concn (μg/kg DM)
Deoxynivalenol	108.6	190.9	3.93	0.004	150.2	186.4	2.31	0.008	474.7	679.4	10.92	0.006
Ochratoxin A	12.0	44.0	5.29	0.003	13.67	39.51	3.34	0.009	25.60	71.64	1.68	0.003

^aValues = mean ± standard error.

^bND, not detectable.

^cMinor VFA is isobutyric acid + valeric acid + isovaleric acid + caproic acid.