Effects of ensiling processes and antioxidants on fatty acid concentrations and compositions in corn silages

Table 2 Effect of the ensiling process on total FA content and composition, MDA , DM and WSC content in corn silage

Treatments	0.5d	1d	1.5d	2d	3d	5d	7d	14d	28d	SEM¹
pH	4.61^a	4.25^b	4.08^c	3.85^d	3.76^de	3.73^de	3.70^e	3.69^e	3.68^c	0.06
Total FA, mg/kg DM	23.68^a	23.04^a	21.73^b	19.56^c	19.43^c	19.45^c	19.51^c	19.57^c	19.75^c	0.76
Proportion in DM, mg/kg DM
C16:0	4.19^c	4.27^b	4.36^b	4.55^a	4.56^a	4.58^a	4.59^a	4.62^a	4.66^a	0.18
C18:0	1.73^c	1.78^c	1.88^b	1.85^b	1.91^a	2.04^a	2.02^a	2.05^a	2.09^a	0.09
C18:1	3.34^a	3.01^b	2.99^b	2.57^c	2.45^c	2.48^c	2.46^c	2.45^c	2.56^c	0.21
C18:2	11.92^a	10.64^b	9.74^c	8.53^d	8.34^d	8.23^d	8.18^d	8.19^d	8.21^d	0.26
C18:3	1.78^a	1.59^b	1.44^c	1.32^d	1.31^d	1.27^d	1.23^d	1.19^d	1.18^d	0.20
Proportion in total FA,%
C16:0	17.69^d	18.53^c	20.06^b	23.26^a	23.46^a	23.54^a	23.52^a	23.60^a	23.59^a	0.41
C18:0	7.31^d	7.73^d	8.65^c	9.46^b	9.83^a	10.49^a	10.35^a	10.47^a	10.58^a	0.52
C18:1	14.10^a	13.06^b	12.84^b	13.14^b	12.61^b	12.24^b	12.61^b	12.52^b	12.96^b	0.35
C18:2	50.33^a	46.18^b	44.82^c	43.61^d	42.92^d	42.31^d	41.93^d	41.84^d	41.56^d	0.62
C18:3	7.52^a	6.90^b	6.63^b	6.74^b	6.74^b	6.53^b	6.30^b	6.08^b	5.97^b	0.24
MDA, μmol/g FW	35.12^d	47.33^c	60.82^b	72.11^a	72.18^a	73.39^a	73.69^a	74.60^a	74.89^a	0.52
DM, g/kg FW	28.83	28.45	27.72	27.69	28.71	28.16	29.80	28.00	27.72	1.69
WSC, g/kg DM	9.93^a	9.62^a	9.24^a	6.73^b	6.71^b	5.27^bc	4.76^c	2.29^d	2.01^d	0.86

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