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.

HybridHerb. 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 yr3 yr1 yr2 yr3 yr1 yr2 yr3 yr1 yr2 yr3 yr
Croplan CP5900SRRVT2P11.2A9.7A9.6A7A7A7.2A41.1A42.3A42.9B52.5A51.4A52.2A
Croplan CP5700SRRVT2P10.3BC8.7A8.7B6.9A6.7A6.6B45.5A44.7A45.1A49.3A49.5AB51.5A
Dyna-Gro D55VC80RRV2TP10.3BC9.1A7A6.8A45.2A42.8A52.8A51.3A
DeKalb DKC 70-64 RIBRRVT2P10.9AB9.4A6.8A6.6A41.6A44.8A49.7A47.4B
DeKalb DKC64-64 RIBRRVT2P9.3D6.9A36.2A52.6A
DeKalb DKC67-66 RIBRRVT2P10.7A-C6.7A42A51.3A
DeKalb DKC61-80 RIBRRVT2P10CD6.8A43.8A49.2A
Croplan CP5370RRVT2P10.1B-D6.7A39.5A51.9A
Average10.49.29.26.86.86.941.943.64451.249.951.8
Standard Error0.31.50.90.30.20.12.21.411.31.51.5
L.S.D..050.82N.S.0.9N.S.N.S.0.4N.S.N.S.1.9N.S.3.1N.S.
C.V.599766974453
Plots per entry (reps x locs.)369369369369

HybridHerb. Pkg.†Insect Pkg.†Starch¶
(% dm)
     Acid Detergent Fiber¶
(% dm)
     Total Digestable Nutrients¶
(% dm)
     Net Energy for Lactation¶
(Mcals/lb)
     
1 yr2 yr3 yr1 yr2 yr3 yr1 yr2 yr3 yr1 yr2 yr3 yr
Croplan CP5900SRRVT2P30.3A32.1A30.7A21.8A22.1A22.9B72A72.7A71.7A0.68A0.7A0.7A
Croplan CP5700SRRVT2P27.2A29.7A28.4B24.6A23.6A24.3A70.3A71.7A70.4B0.67A0.7A0.69B
Dyna-Gro D55VC80RRV2TP28.8A33.8A23.2A21.6A71.4A72.6A0.67A0.7A
DeKalb DKC 70-64 RIBRRVT2P31.1A30A20.9A23A71.2A70.1A0.68A0.69A
DeKalb DKC64-64 RIBRRVT2P39.6A17.5A72A0.68A
DeKalb DKC67-66 RIBRRVT2P32.1A22.4A71.4A0.68A
DeKalb DKC61-80 RIBRRVT2P31.6A23.2A70.4A0.68A
Croplan CP5370RRVT2P35.8A20.3A72A0.68A
Average32.131.429.621.722.623.671.371.871.10.680.70.7
Standard Error2.42.41.91.50.90.80.80.81.300.020.02
L.S.D..05N.S.N.S.0.9N.S.N.S.1.3N.S.N.S.0.9N.S.N.S.0.01
C.V.1310312105221121
Plots per entry (reps x locs.)369369369369

* 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.

Virginia Sykes
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