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 2020. Analysis included hybrid performance across a 1 yr (2020), 2 yr (2019-2020) and 3 yr (2018-2020) 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
HybridHerbicide Pkg.‡Insect Pkg.‡Dry Weight Avg. Yield
(tons/acre)
MS Dry Weight Avg. YieldDry Weight Avg. Yield
(tons/acre)
MS Dry Weight Avg. YieldDry Weight Avg. Yield
(tons/acre)
MS Dry Weight Avg. YieldCrude Protein
(% dm)
MS Crude ProteinCrude Protein
(% dm)
MS Crude ProteinCrude Protein
(% dm)
MS Crude ProteinNDF
(% dm)
MS NDFNDF
(% dm)
MS NDFNDF
(% dm)
MS NDF30h IV NDFD
(% of NDF)
MS 30h IV NDFD30h IV NDFD
(% of NDF)
MS 30h IV NDFD30h IV NDFD
(% of NDF)
MS 30h IV NDFD
CS190057.9A6.5A40.3BCD49.8A
Dyna-Gro D55VC80RRV2TPCS170017.4A7.0A38.7D49.9A
Croplan CP5678RRVT2PCS160018.1A8.8A8.9A7.1A7.3A6.7A43.4BC43.7A42.0A50.2A52.0A49.6A
Croplan CP5900S***RRVT2PCS200027.9A6.4A48.1A45.0B
DeKalb DKC 70-64RRVT2PCS200037.3A6.3A39.3CD50.4A
DeKalb DKC 64-44RR,LLSSXCS190077.4A6.7A43.3BC49.4A
Dyna-Gro D57VC17RRV2TPCS180057.1A7.9A8.0A6.6A6.5B6.3A43.8B44.8A45.4A49.8A52.6A49.7A
Croplan CP5700S***RRVT2PCS200017.1A6.7A39.2D47.4AB
Average7.58.48.56.76.96.542.044.343.749.052.349.7
Standard Error0.50.80.50.30.20.41.31.11.61.02.33.0
L.S.D..05N.S.N.S.N.S.N.S.0.6N.S.4.0N.S.N.S.3.0N.S.N.S.
C.V.1211106675311324
Plots per entry (reps x locs.)122436122436122436122436
Table 4-b, cont.
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
HybridHerbicide Pkg.‡Insect Pkg.‡Starch
(% dm)
MS StarchStarch
(% dm)
MS StarchStarch
(% dm)
MS StarchADF
(% dm)
MS ADFADF
(% dm)
MS ADFADF
(% dm)
MS ADFTDN
(% dm)
MS TDNTDN
(% dm)
MS TDNTDN
(% dm)
MS TDNNEL
(Mcals/lb)
MS NELNEL
(Mcals/lb)
MS NELNEL
(Mcals/lb)
MS NEL
#N/A#N/A#N/ACS1900538.9AB20.0BCDE73.7AB0.73ABC
Dyna-Gro D55VC80RRV2TPCS1700140.1A18.7E74.5AB0.74ABC
Croplan CP5678RRVT2PCS1600133.9C30.9A33.3A22.3BC23.5A22.8A73.3AB71.6A70.0A0.73BC0.71A0.69A
Croplan CP5900S***RRVT2PCS2000229.0D25.2A68.9C0.69D
DeKalb DKC 70-64RRVT2PCS2000339.3AB19.4CDE75.1A0.75AB
DeKalb DKC 64-44RR,LLSSXCS1900735.3BC21.9BCD72.7B0.72C
Dyna-Gro D57VC17RRV2TPCS1800532.3CD29.1B27.9A22.6AB24.1A25.1A73.1AB70.5A68.3A0.73BC0.70A0.67B
Croplan CP5700S***RRVT2PCS2000140.2A19.2DE74.8AB0.75A
Average36.130.030.621.223.824.073.371.169.10.730.700.68
Standard Error1.73.12.40.91.31.20.72.22.40.010.020.03
L.S.D..054.51.4N.S.2.8N.S.N.S.2.1N.S.N.S.0.02N.S.0.02
C.V.73198413212222
Plots per entry (reps x locs.)122436122436122436122436
* 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 signficiant difference (LSD) mean separation test. ¶ Nutritive content values were calculated on a 100% dry matter (DM) basis.
Virginia Sykes

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