Table 3. Effect of canola oil in the diet of lactating dairy cows on milk yield and composition.

Item	Inclusion of canola oil			Means	SEM	P-value**
	Control	3%	6%			L	Q
Milk yield1 kg/d	23.50	22.46	20.99	22.28	0.69	0.0001	0.62
FCM2 kg/d	23.46	20.88	19.88	21.45	0.73	0.0001	0.105
Fat3 %	3.48	3.13	3.18	3.27	0.08	0.009	0.04
Fat4 kg/d	0.79	0.69	0.66	0.71	0.03	0.0002	0.18
CP5 %	3.58	3.73	3.90	3.72	0.06	0.0001	0.81
CP kg/d	0.82	0.80	0.81	0.82	0.02	0.58	0.55
Lactose %	4.44	4.46	4.45	4.45	0.03	0.83	0.51
Lactose 6 kg/d	1.04	1.01	0.93	1.002	0.03	0.001	0.34
SNF7 %	8.95	9.19	9.30	9.15	0.07	0.0003	0.43
SNF8 kg/d	2.09	2.06	1.96	2.04	0.05	0.005	0.405
TS %	12.34	12.32	12.60	12.41	0.13	0.16	0.34
TS9 kg/d	2.88	2.70	2.62	2.74	0.08	0.001	0.42
MUN, mg/dL	19.58	18.58	18.91	18.94	0.36	0.23	0.16

** L = probability of linear effect, Q = probability of quadratic effect. FCM = 3.5% fat-corrected milk; SNF = Solids not-fat; TS = Total solids; SCC = Somatic cell count; MUN = Milk urea nitrogen. IOC = Inclusion of canola oil. Equations:

¹Y = 23.57 (SE = 1.16)− 0.42 (SE = 0.08) × IOC (%)

²Y = 23.24 (SE = 1.27)− 0.59 (SE = 0.09) × IOC (%)

³Y = 3.48 (SE = 0.17)− 0.18 (SE = 0.06) × IOC (%) + 0.02 (SE = 0.01) × IOC² (%²)

⁴Y = 0.78 (SE = 0.05)− 0.02 (SE = 0.005) × IOC (%)

⁵Y = 3.58 (SE = 0.11)+ 0.05 (SE = 0.01) × IOC (%)

⁶Y = 1.05 (SE = 0.05)− 0,01 (SE = 0.003) × IOC (%)

⁷Y = 8.95 (SE = 0.12)+ 0.09. (SE = 0.05) × IOC (%)

⁸Y = 2.10 (SE = 0.10)− 0.02 (SE = 0.007) × IOC (%)

⁹Y = 2.87 (SE = 0.145)− 0.04 (SE = 0.012) × IOC (%).