Milk Fatty Acid Profile of Holstein Cows When Changed from a Mixed System to a Confinement System or Mixed System with Overnight Grazing

Table 2

Effect of treatment (), month (), and interaction between treatment and month () on milk yield and fat () in month 1 (M1) and month 3 (M3) of lactation.

		GTMR		GCHD		GTMR+P		SEM	value
		M1	M3	M1	M3	M1	M3
Milk yield (kg/d)		33.89^Aa	32.34^Aa	30.88^Aa	35.30^Ab	32.48^Aa	25.99^Bb	3.5	ns	ns	0.005
Fat	(%)	2.09^Aa	2.47^Aa	4.12^Ba	2.8^ABb	3.53^Ba	3.28^Ba	0.2	0.04	0.04	0.003
	(kg/d)	0.76^Aa	0.8^Aa	1.08^Ba	0.96^Aa	1.09^Ba	0.78^Ab	0.1	ns	0.01	0.013

Treatments: GTMR: cows fed TMR; GCHD: cows diet change; GTMR+P: cows TMR+pasture. When there was significant interaction between treatment and month: differences between treatments in the same month (different capital letters) and difference between months within each treatment (different small letters) indicate were shown. ns: no significance; SEM: standard error of the mean.