Table 4-b. East Tennessee (Knoxville) Yield and Feed Quality Characteristics

Table 4-b. By location mean dry weight yield and feed quality characteristics of eight corn hybrids evaluated for silage in small plot replicated trials at the East Tennessee AgResearch and Education Center in Knoxville, Tennessee during 2021. Analysis included hybrid performance across a 1 yr (2021), 2 yr (2020-2021) and 3 yr (2019-2021) period.

Hybrid	Herb. Pkg.†	Insect Pkg.†	Avg. Yield Dry Weight (tons/acre)						Crude Protein¶ (% dm)						Neutral Detergent Fiber¶ (% dm)						30 hr In Vitro Neutral Detergent Fiber Digestibility¶ (% of NDF)
			1 yr‡		2 yr		3 yr		1 yr		2 yr		3 yr		1 yr		2 yr		3 yr		1 yr		2 yr		3 yr
Croplan CP5900S	RR	VT2P	11.2	A	9.7	A	9.6	A	7	A	7	A	7.2	A	41.1	A	42.3	A	42.9	B	52.5	A	51.4	A	52.2	A
Croplan CP5700S	RR	VT2P	10.3	BC	8.7	A	8.7	B	6.9	A	6.7	A	6.6	B	45.5	A	44.7	A	45.1	A	49.3	A	49.5	AB	51.5	A
Dyna-Gro D55VC80	RR	V2TP	10.3	BC	9.1	A			7	A	6.8	A			45.2	A	42.8	A			52.8	A	51.3	A
DeKalb DKC 70-64 RIB	RR	VT2P	10.9	AB	9.4	A			6.8	A	6.6	A			41.6	A	44.8	A			49.7	A	47.4	B
DeKalb DKC64-64 RIB	RR	VT2P	9.3	D					6.9	A					36.2	A					52.6	A
DeKalb DKC67-66 RIB	RR	VT2P	10.7	A-C					6.7	A					42	A					51.3	A
DeKalb DKC61-80 RIB	RR	VT2P	10	CD					6.8	A					43.8	A					49.2	A
Croplan CP5370	RR	VT2P	10.1	B-D					6.7	A					39.5	A					51.9	A
Average			10.4		9.2		9.2		6.8		6.8		6.9		41.9		43.6		44		51.2		49.9		51.8
Standard Error			0.3		1.5		0.9		0.3		0.2		0.1		2.2		1.4		1		1.3		1.5		1.5
L.S.D..05			0.82		N.S.		0.9		N.S.		N.S.		0.4		N.S.		N.S.		1.9		N.S.		3.1		N.S.
C.V.			5		9		9		7		6		6		9		7		4		4		5		3
Plots per entry (reps x locs.)			3		6		9		3		6		9		3		6		9		3		6		9

Hybrid	Herb. Pkg.†	Insect Pkg.†	Starch¶ (% dm)						Acid Detergent Fiber¶ (% dm)						Total Digestable Nutrients¶ (% dm)						Net Energy for Lactation¶ (Mcals/lb)
			1 yr		2 yr		3 yr		1 yr		2 yr		3 yr		1 yr		2 yr		3 yr		1 yr		2 yr		3 yr
Croplan CP5900S	RR	VT2P	30.3	A	32.1	A	30.7	A	21.8	A	22.1	A	22.9	B	72	A	72.7	A	71.7	A	0.68	A	0.7	A	0.7	A
Croplan CP5700S	RR	VT2P	27.2	A	29.7	A	28.4	B	24.6	A	23.6	A	24.3	A	70.3	A	71.7	A	70.4	B	0.67	A	0.7	A	0.69	B
Dyna-Gro D55VC80	RR	V2TP	28.8	A	33.8	A			23.2	A	21.6	A			71.4	A	72.6	A			0.67	A	0.7	A
DeKalb DKC 70-64 RIB	RR	VT2P	31.1	A	30	A			20.9	A	23	A			71.2	A	70.1	A			0.68	A	0.69	A
DeKalb DKC64-64 RIB	RR	VT2P	39.6	A					17.5	A					72	A					0.68	A
DeKalb DKC67-66 RIB	RR	VT2P	32.1	A					22.4	A					71.4	A					0.68	A
DeKalb DKC61-80 RIB	RR	VT2P	31.6	A					23.2	A					70.4	A					0.68	A
Croplan CP5370	RR	VT2P	35.8	A					20.3	A					72	A					0.68	A
Average			32.1		31.4		29.6		21.7		22.6		23.6		71.3		71.8		71.1		0.68		0.7		0.7
Standard Error			2.4		2.4		1.9		1.5		0.9		0.8		0.8		0.8		1.3		0		0.02		0.02
L.S.D..05			N.S.		N.S.		0.9		N.S.		N.S.		1.3		N.S.		N.S.		0.9		N.S.		N.S.		0.01
C.V.			13		10		3		12		10		5		2		2		1		1		2		1
Plots per entry (reps x locs.)			3		6		9		3		6		9		3		6		9		3		6		9

* Hybrids marked with an asterisk were in the top-performing “A” group for yield across locations within two (**) or three (***) consecutive years of the previous three year evaluation period.
† For a full description of abbreviated biotech traits, see table 10.
‡ Hybrids that have any MS letter in common, within a column, are not significantly different at the 5% level of probability using a least significant difference (LSD) mean separation test.
¶ Nutritive content values were calculated on a 100% dry matter (DM) basis.