Table 2-b. Across Locations Yield and Feed Quality Characteristics

Table 2-b. Across location mean dry weight yield and feed quality characteristics of eight corn hybrids evaluated for silage in small plot replicated trials at four REC locations in 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
#N/A#N/A#N/ACS190057.4A7.5A47.3B50.6AB
Dyna-Gro D55VC80RRV2TPCS170017.1A7.3A46.8B48.3C
Croplan CP5678RRVT2PCS160017.0A7.7A8.1A7.3A7.4A7.3A47.9B47.7A47.2A50.1AB52.2A49.7A
Croplan CP5900S***RRVT2PCS200026.9A7.2A50.8A48.3C
DeKalb DKC 70-64RRVT2PCS200036.7A7.2A46.1B51.1A
DeKalb DKC 64-44RR,LLSSXCS190076.7A7.2A46.3B49.2BC
Dyna-Gro D57VC17RRV2TPCS180056.6A7.5A7.6A7.2A7.3A7.1A47.9B46.9A47.3A50.0AB51.9A49.4A
Croplan CP5700S***RRVT2PCS200016.6A7.4A46.0B49.1BC
Average6.97.67.87.37.47.247.447.347.249.652.149.6
Standard Error0.50.80.60.60.60.52.01.21.51.72.32.9
L.S.D..05N.S.N.S.N.S.N.S.N.S.N.S.2.6N.S.N.S.1.6N.S.N.S.
C.V.121212677758446
Plots per entry (reps x locs.)122436122436122436122436

 

Table 2-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/ACS1900527.6AB24.7B70.8AB0.69AB
Dyna-Gro D55VC80RRV2TPCS1700128.4AB24.4B69.7AB0.69AB
Croplan CP5678RRVT2PCS1600125.4B24.2A24.9A25.2B25.8A26.0A69.3B67.8A67.1A0.68B0.67A0.65A
Croplan CP5900S***RRVT2PCS2000221.5C27.2A65.8C0.64C
DeKalb DKC 70-64RRVT2PCS2000329.4A24.1B71.6A0.70A
DeKalb DKC 64-44RR,LLSSXCS1900730.4A23.8B71.0AB0.70A
Dyna-Gro D57VC17RRV2TPCS1800525.4B24.8A24.6A25.2B25.3A26.0A69.5B68.1A67.0A0.68AB0.67A0.65A
Croplan CP5700S***RRVT2PCS2000128.9AB24.0B70.4AB0.69AB
Average27.124.524.824.825.526.069.768.067.00.680.670.65
Standard Error3.71.92.21.50.71.01.41.71.50.020.010.01
L.S.D..053.6N.S.N.S.1.9N.S.N.S.2.0N.S.N.S.0.02N.S.N.S.
C.V.1611209710334434
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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