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.
| 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 | ||||||||||||||||
| Hybrid | Herbicide Pkg.‡ | Insect Pkg.‡ | Dry Weight Avg. Yield (tons/acre) | MS Dry Weight Avg. Yield | Dry Weight Avg. Yield (tons/acre) | MS Dry Weight Avg. Yield | Dry Weight Avg. Yield (tons/acre) | MS Dry Weight Avg. Yield | Crude Protein (% dm) | MS Crude Protein | Crude Protein (% dm) | MS Crude Protein | Crude Protein (% dm) | MS Crude Protein | NDF (% dm) | MS NDF | NDF (% dm) | MS NDF | NDF (% dm) | MS NDF | 30h IV NDFD (% of NDF) | MS 30h IV NDFD | 30h IV NDFD (% of NDF) | MS 30h IV NDFD | 30h IV NDFD (% of NDF) | MS 30h IV NDFD | |
| #N/A | #N/A | #N/A | CS19005 | 7.4 | A | 7.5 | A | 47.3 | B | 50.6 | AB | ||||||||||||||||
| Dyna-Gro D55VC80 | RR | V2TP | CS17001 | 7.1 | A | 7.3 | A | 46.8 | B | 48.3 | C | ||||||||||||||||
| Croplan CP5678 | RR | VT2P | CS16001 | 7.0 | A | 7.7 | A | 8.1 | A | 7.3 | A | 7.4 | A | 7.3 | A | 47.9 | B | 47.7 | A | 47.2 | A | 50.1 | AB | 52.2 | A | 49.7 | A |
| Croplan CP5900S*** | RR | VT2P | CS20002 | 6.9 | A | 7.2 | A | 50.8 | A | 48.3 | C | ||||||||||||||||
| DeKalb DKC 70-64 | RR | VT2P | CS20003 | 6.7 | A | 7.2 | A | 46.1 | B | 51.1 | A | ||||||||||||||||
| DeKalb DKC 64-44 | RR,LL | SSX | CS19007 | 6.7 | A | 7.2 | A | 46.3 | B | 49.2 | BC | ||||||||||||||||
| Dyna-Gro D57VC17 | RR | V2TP | CS18005 | 6.6 | A | 7.5 | A | 7.6 | A | 7.2 | A | 7.3 | A | 7.1 | A | 47.9 | B | 46.9 | A | 47.3 | A | 50.0 | AB | 51.9 | A | 49.4 | A |
| Croplan CP5700S*** | RR | VT2P | CS20001 | 6.6 | A | 7.4 | A | 46.0 | B | 49.1 | BC | ||||||||||||||||
| Average | 6.9 | 7.6 | 7.8 | 7.3 | 7.4 | 7.2 | 47.4 | 47.3 | 47.2 | 49.6 | 52.1 | 49.6 | |||||||||||||||
| Standard Error | 0.5 | 0.8 | 0.6 | 0.6 | 0.6 | 0.5 | 2.0 | 1.2 | 1.5 | 1.7 | 2.3 | 2.9 | |||||||||||||||
| L.S.D..05 | N.S. | N.S. | N.S. | N.S. | N.S. | N.S. | 2.6 | N.S. | N.S. | 1.6 | N.S. | N.S. | |||||||||||||||
| C.V. | 12 | 12 | 12 | 6 | 7 | 7 | 7 | 5 | 8 | 4 | 4 | 6 | |||||||||||||||
| Plots per entry (reps x locs.) | 12 | 24 | 36 | 12 | 24 | 36 | 12 | 24 | 36 | 12 | 24 | 36 | |||||||||||||||
Table 2-b, cont.
| 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 | ||||||||||||||||
| Hybrid | Herbicide Pkg.‡ | Insect Pkg.‡ | Starch (% dm) | MS Starch | Starch (% dm) | MS Starch | Starch (% dm) | MS Starch | ADF (% dm) | MS ADF | ADF (% dm) | MS ADF | ADF (% dm) | MS ADF | TDN (% dm) | MS TDN | TDN (% dm) | MS TDN | TDN (% dm) | MS TDN | NEL (Mcals/lb) | MS NEL | NEL (Mcals/lb) | MS NEL | NEL (Mcals/lb) | MS NEL | |
| #N/A | #N/A | #N/A | CS19005 | 27.6 | AB | 24.7 | B | 70.8 | AB | 0.69 | AB | ||||||||||||||||
| Dyna-Gro D55VC80 | RR | V2TP | CS17001 | 28.4 | AB | 24.4 | B | 69.7 | AB | 0.69 | AB | ||||||||||||||||
| Croplan CP5678 | RR | VT2P | CS16001 | 25.4 | B | 24.2 | A | 24.9 | A | 25.2 | B | 25.8 | A | 26.0 | A | 69.3 | B | 67.8 | A | 67.1 | A | 0.68 | B | 0.67 | A | 0.65 | A |
| Croplan CP5900S*** | RR | VT2P | CS20002 | 21.5 | C | 27.2 | A | 65.8 | C | 0.64 | C | ||||||||||||||||
| DeKalb DKC 70-64 | RR | VT2P | CS20003 | 29.4 | A | 24.1 | B | 71.6 | A | 0.70 | A | ||||||||||||||||
| DeKalb DKC 64-44 | RR,LL | SSX | CS19007 | 30.4 | A | 23.8 | B | 71.0 | AB | 0.70 | A | ||||||||||||||||
| Dyna-Gro D57VC17 | RR | V2TP | CS18005 | 25.4 | B | 24.8 | A | 24.6 | A | 25.2 | B | 25.3 | A | 26.0 | A | 69.5 | B | 68.1 | A | 67.0 | A | 0.68 | AB | 0.67 | A | 0.65 | A |
| Croplan CP5700S*** | RR | VT2P | CS20001 | 28.9 | AB | 24.0 | B | 70.4 | AB | 0.69 | AB | ||||||||||||||||
| Average | 27.1 | 24.5 | 24.8 | 24.8 | 25.5 | 26.0 | 69.7 | 68.0 | 67.0 | 0.68 | 0.67 | 0.65 | |||||||||||||||
| Standard Error | 3.7 | 1.9 | 2.2 | 1.5 | 0.7 | 1.0 | 1.4 | 1.7 | 1.5 | 0.02 | 0.01 | 0.01 | |||||||||||||||
| L.S.D..05 | 3.6 | N.S. | N.S. | 1.9 | N.S. | N.S. | 2.0 | N.S. | N.S. | 0.02 | N.S. | N.S. | |||||||||||||||
| C.V. | 16 | 11 | 20 | 9 | 7 | 10 | 3 | 3 | 4 | 4 | 3 | 4 | |||||||||||||||
| Plots per entry (reps x locs.) | 12 | 24 | 36 | 12 | 24 | 36 | 12 | 24 | 36 | 12 | 24 | 36 | |||||||||||||||
* 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 vsykes@utk.edu
- Table 1. 2021 Total entry numbers - December 26, 2021
- Table A-35. Mean yields and agronomic data from Memphis, TN, MG-5 - December 23, 2021
- Table A-34. Mean yields and agronomic data from Jackson, TN, MG-5 - December 22, 2021