. 2019 Mar 7;32(10):1521–1527. doi: 10.5713/ajas.18.0695

Table 4.

The nitrogen components of alfalfa and red clover silages treated with or without γ-ray radiation

Stage	Forage species	Peptide-N (g/kg TN)		FAA-N (g/kg TN)		NH₃-N (g/kg TN)		NPN (g/kg TN)

		Control	γ-Ray	Control	γ-Ray	Control	γ-Ray	Control	γ-Ray
Fresh forage	Alfalfa	56.1^B	56.1^B	15.8^B	15.8^B	0	0	80.1^B	80.1^B
	Red clover	41.6^A	41.6^A	7.16^A	7.16^A	0	0	47.9^A	47.9^A
One-days silage	Alfalfa	91.6^a	297^B ^b	112^B ^a	224^B ^b	26.8^B ^b	11.8^a	293^B ^a	447^B ^b
	Red clover	103	95.1^A	41.4^A ^b	18.8^A ^a	12.1^A	8.60	198^A ^b	153^A ^a
Four-days silage	Alfalfa	311^B ^b	210^B ^a	149^B	159^B	26.8	18.6	479^B ^b	395^B ^a
	Red clover	83.9^A ^a	107^A ^b	49.2^A	45.5^A	24.1^b	14.2^a	206^A	211^A
Eight-days silage	Alfalfa	247^B ^b	221^B ^a	297^B ^b	213^B ^a	58.4^B ^b	24.4^B ^a	511^B ^b	420^B ^a
	Red clover	148^A ^b	106^A ^a	77.9^A ^b	37.4^A ^a	33.8^A ^b	16.2^A ^a	286^A ^b	201^A ^a
Thirty-days silage	Alfalfa	259^B ^b	236^B ^a	297^B	321^B	78.0^B ^b	35.4^B ^a	519^B	484^B
	Red clover	71.5^A	80.6^A	56.6^A	60.1^A	48.2^A ^b	22.1^A ^a	280^A ^b	219^A ^a
SEM		4.76		1.99		1.77		5.91
p-value
Forage species		<0.001		<0.001		<0.001		<0.001
γ-Ray radiation		0.017		0.004		0.021		<0.001
Forage species×γ-ray radiation		<0.001		<0.001		0.203		<0.001

TN, total nitrogen; FAA-N, free amino acid N; NH₃-N, ammonia N; NPN, non-protein N; SEM, standard error of means (n = 4).

^A,B

At each ensiling interval values in the same column with different capital letter differ significantly between alfalfa and red clover.

^a,b

Values in the same row with different lowercase letter differ significantly between treatment and control.