Table 7-b. Highland Rim (Springfield) Yield and Feed Quality Characteristics

Table 7-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 Highland Rim AgResearch and Education Center in Springfield, 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	6.9	A	6.8	A	6.8	A	7.7	A	8.2	A	8.4	A	45.7	A	48.4	AB	46.6	A	57.9	A	56.3	A	56.9	A
Croplan CP5700S	RR	VT2P	6.5	A	6.5	A	6.8	A	7.7	A	8	A	8.3	A	43.3	A	46	B	45.1	A	58.5	A	56.8	A	55.8	A
Dyna-Gro D55VC80	RR	V2TP	6.6	A	7.2	A			7.5	A	8.1	A			47.1	A	49.6	A			56.3	A	55.9	A
DeKalb DKC 70-64 RIB	RR	VT2P	5.8	A	5.9	A			7.4	A	7.9	A			48	A	50.3	A			54	A	54.3	A
DeKalb DKC64-64 RIB	RR	VT2P	7.1	A					8	A					41.9	A					59.2	A
DeKalb DKC67-66 RIB	RR	VT2P	5.9	A					7.2	A					48	A					55.2	A
DeKalb DKC61-80 RIB	RR	VT2P	6.2	A					8.1	A					42.4	A					57.5	A
Croplan CP5370	RR	VT2P	6.6	A					7.9	A					40.6	A					60.7	A
Average			6.5		6.6		6.8		7.7		8.1		8.3		44.6		48.6		45.9		57.4		55.8		56.4
Standard Error			0.7		0.5		0.3		0.5		0.5		0.3		1.8		2.7		2.1		1.5		1.1		1.1
L.S.D..05			N.S.		N.S.		N.S.		N.S.		N.S.		N.S.		N.S.		2.6		N.S.		N.S.		N.S.		N.S.
C.V.			14		14		13		10		7		6		7		4		4		4		4		5
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	19.9	BC	17.8	B	20.7	B	24.1	A	26.2	AB	25.4	A	73.8	A-C	70.4	A	70.7	A	0.68	AB	0.65	A	0.67	A
Croplan CP5700S	RR	VT2P	23.2	A-C	21	A	23.1	A	22.6	A	24.4	B	24.1	B	74.5	AB	71.7	A	71	A	0.68	A	0.67	A	0.68	A
Dyna-Gro D55VC80	RR	V2TP	21.8	A-C	19.9	AB			24	A	26.6	A			73.2	B-D	71.9	A			0.68	AB	0.68	A
DeKalb DKC 70-64 RIB	RR	VT2P	18.2	C	15.1	C			25.1	A	27.1	A			71.9	D	67.9	B			0.67	BC	0.63	B
DeKalb DKC64-64 RIB	RR	VT2P	26.4	A					21	A					74.6	AB					0.68	A
DeKalb DKC67-66 RIB	RR	VT2P	19.9	BC					24.7	A					72	CD					0.67	C
DeKalb DKC61-80 RIB	RR	VT2P	25.4	AB					21.9	A					74.1	AB					0.68	A
Croplan CP5370	RR	VT2P	27.4	A					20.6	A					75.6	A					0.68	A
Average			22.8		18.5		21.9		23		26.1		24.7		73.7		70.5		70.8		0.68		0.66		0.67
Standard Error			1.8		2.4		2.8		1.2		2.2		1.3		0.7		2.9		1.9		0		0.02		0.02
L.S.D..05			5.6		2.4		1.9		N.S.		1.8		1.2		1.9		1.9		N.S.		0.01		0.02		N.S.
C.V.			14		11		8		9		6		4		2		2		3		1		3		2
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.