Effects of the dietary nonfiber carbohydrate content on lactation performance, rumen fermentation, and nitrogen utilization in mid-lactation dairy cows receiving corn stover

Table 7 Effects of 3 experimental diets on plasma metabolites in cows

Items	Treatment^d			SEM	P-value
Items	AH	L-NFC	H-NFC	SEM	P-value
Total protein, g/L	80.0	78.8	80.4	1.36	0.07
Albumin, g/L	26.5	26.8	26.6	0.40	0.16
Blood urea nitrogen, mmol/L	5.92^b	6.44^a	5.61^c	0.28	< 0.01
Glucose, mmol/L	2.48	2.49	2.44	0.05	0.21
Cholesterol, mmol/L	5.73	5.62	5.67	0.12	0.30
Non-esterified fatty acids, μmol/L	202	204	206	6.81	0.87
β-Hydroxybutyric acid, μmol/L	467	511	470	30.3	0.19

^a-cLeast squares means within a row with different superscripts differ (P < 0.05)
^dAH = Total mixed rations containing alfalfa hay; L-NFC = Total mixed rations containing corn stover with a low content of non-fiber carbohydrates; H-NFC = Total mixed rations containing corn stover formulated to have similar non-fiber carbohydrate concentrations as the AH diet

ISSN: 2049-1891