Comparison of milk and grass composition from grazing Irish dairy herds with and without milk fat depression

Table 3 Mean milk FA composition of HMF, MMF and LMF herds (g/100 g FA)

	HMF¹	MMF¹	LMF¹	S.E.M²
FA (g/100 g FA)
C4:0	1.68	1.70	1.66	0.081
C6:0	1.55^a	1.38^b	1.45^a,b	0.048
C8:0	1.26	1.21	1.20	0.021
C10:0	3.37^a	3.24^a,b	3.16^b	0.068
C11:0	0.11	0.10	0.10	0.007
C12:0	4.36^a	4.15^a,b	4.05^b	0.099
C13:0	0.27	0.25	0.25	0.010
C14:0	12.86	12.88	12.57	0.184
C14:1c9	1.03^a	1.12^b	1.11^a,b	0.031
C15:0	1.48	1.45	1.43	0.032
³ Total de-novo FA	27.76	27.49	26.94	0.427
C16:0	29.67	29.78	28.95	0.362
C16:1c9	1.43	1.43	1.37	0.033
C17:0	0.81	0.81	0.82	0.012
C18:0	11.53	11.10	11.28	0.250
C18:1t9	0.39^a	0.46^a,b	0.50^b	0.027
C18:1t11	3.25	3.11	3.27	0.148
C18:1c9	20.08	20.90	21.38	0.384
C18:1c11	0.45	0.46	0.48	0.015
C18:2c 9,12	1.11^a	1.25^b	1.34^c	0.037
C18:3c9,12,15	0.74	0.72	0.76	0.017
C20:0	0.14	0.14	0.14	0.005
C20:5c 5, 8, 11, 14, 17	0.09	0.09	0.10	0.002
CLA c9, t11	1.43	1.46	1.56	0.073
CLA t10, c12	0.06	0.05	0.05	0.003
Total CLA	1.48	1.52	1.64	0.074
Total Saturated FA	69.42^a	68.36^a,b	67.36^b	0.526
Total MUFA	23.08^a	23.97^a,b	24.37^b	0.392
Total PUFA	2.36^a	2.54^b	2.69^c	0.055
Total Unsaturated FA	25.45^a	26.45^ab	26.97^b	0.416
Total Omega 3 FA	1.00	0.96	1.01	0.019
Total Omega 6 FA	1.39^a	1.56^b	1.67^b	0.042
Total Omega 7 FA	1.92	1.89	1.83	0.036
Total Omega 9 FA	20.14^a	20.96^a,b	21.45^b	0.384
Ratio Omega 3:Omega 6	0.73^a	0.63^b	0.62^b	0.018
Ratio Omega 6:Omega 3	1.41^a	1.64^b	1.68^b	0.048

¹HMF (> 3.95% milk fat) = High milk fat herds, MMF (3.31 – 3.94% milk fat) = Medium milk fat herds, LMF = Low milk fat herds (< 3.30% milk fat)
²S.E.M = Standard error of the mean
^a,b,c, Means in the same row with different superscripts differ (P < 0.05)
³Total de-novo FA = sum of FA from C4 to C15:0 inclusive

ISSN: 2046-0481