Table 6.

Effects of feeding RSC containing high GLS on the urine N₂O emissions in steers.

Item	Dietary levels of RSC, % DM				SEM	P-value
	0	2.7	5.4	8.0		Ration	Linear	Quadratic
N2O–N flux, mg/kg soil DW	4.27ab	3.98a	5.22bc	6.32c	0.45	0.002	<0.001	0.091
N2O–N to N application ratio, %	4.58a	4.79a	5.28a	6.72b	0.51	0.001	<0.001	0.110
Urine volume, L/d	9.87	10.17	8.95	8.81	1.23	0.119	0.046	0.623
Estimated N2O–N emissions, mg	1,049.0a	1,102.8a	1,142.3a	1,491.4b	112.1	<0.001	<0.001	0.026

RSC = rapeseed cake; GLS = glucosinoltaes; DM = dry matter; N₂O = nitrous oxide; N = nitrogen; DW = dry weight.

^a-c Means in the same row with different superscripts differ (P < 0.05, n = 8).