Carinata meal (CM) has high quality protein, but it also has high concentration of sinigrin, a glucosinolate, which limits its use as a feedstuff. Our objective was to determine if ensiling CM with forages would decrease sinigrin concentration without compromising fermentation. Two trials were conducted, one on ensiling CM with alfalfa haylage (AH) and one with corn silage (CS). For both trials 3 blends of CM and forage were made of 0:100, 25:27, and 50:50 on a DM basis. In both approximately 637 g of DM for each the 3 blends were packed in 942 cm³ microsilos in quadruplicate for 0, 7, 21 and 60 d of ensiling. Sinigrin was greatest (P < 0.01) in the 50:50 and decreased over time (P < 0.01) in the 25:75 and 50:50 in both trials. There was no treatment by d interaction for AH blends, but there was a treatment by d interaction for the CS blends for sinigrin. The pH decreased in all blends over time, but was greater in the 50:50 compared with the other blends. Acetic acid and lactic acid increased over time in all blends. Acetic acid was less in the AH blends with increased CM. There was no treatment effect on acetic acid for the CS blends. Lactic acid was less in both trials with increased inclusion of CM. In both trials, CP increased with inclusion of CM. The CP was similar over d of ensiling in AH blends, but tended (P = 0.05) to decrease over d in CS blends. In both trials, NDF was less with the addition of the CM and there was a treatment by d interaction (P < 0.01) in CS, and a tendency (P = 0.08) for interaction in the AH trial. Ensiling CM with forage decreases sinigrin concentration, without major detriment to silage fermentation. Table 1

Item, % DM	Blend	0:100	25:75	50:50	SEM	Treatment	Day	Trt × Day
Sinigrin, mg/g	AH	—	2.24	5.78	0.13	<0.01	<0.01	0.65
	CS	—	3.67	7.12	0.17	<0.01	<0.01	<0.01
pH	AH	4.89	4.83	5.0	0.02	<0.01	<0.01	<0.01
	CS	3.96	4.23	4.47	0.04	<0.01	<0.01	0.90
Acetic acid	AH	1.32	1.05	0.75	0.04	<0.01	<0.01	<0.01
	CS	0.89	0.96	0.94	0.03	0.22	<0.01	0.61
Lactic acid	AH	3.71	2.57	1.77	0.07	<0.01	<0.01	<0.01
	CS	2.64	2.35	2.16	0.05	<0.01	<0.01	<0.01
CP	AH	24.6	29.6	32.6	0.96	<0.01	0.20	0.09
	CS	6.2	15.6	25.0	0.28	<0.01	0.05	0.19
NDF	AH	38.5	34.8	31.8	0.25	<0.01	<0.01	0.08
	CS	33.9	30.4	28.7	0.22	<0.01	0.05	<0.01