Table 25. Evaluation of tropical corn varieties at the Coastal Plains Branch Station, Newton, MS, 1994.
Silage yield @ Grain Southern
65% moisture yield Plant Ear leaf
Hybrid Brand 1994 3 yr av 1994 3 yr av height height rust2/
----------------------------------tons/A-----------bu/A----------ft-------in----------
McNair 5081/ Northrup King 15.5 14.1 61.7 59.0 10.9 62 1.9
G 48681/ Deltapine 15.2 63.8 9.3 53 2.9
X9255 Cargill 15.9 15.8 80.4 74.3 9.9 48 2.1
XL 678C DeKalb 17.4 16.9 67.4 57.7 11.2 71 1.4
375T Oro 17.0 74.2 10.8 65 1.6
X304C Pioneer 17.8 17.1 72.6 60.4 12.0 68 1.6
3085 Pioneer 15.2 82.0 10.2 56 2.5
3098 Pioneer 16.4 15.6 73.2 66.3 11.0 71 1.4
--------------------------------------------------------------------------------------
Mean 16.3 15.9 72.0 63.5 10.7 61 1.9
LSD(0.05) 2.6 13.5 0.5 5.6 0.4
CV% 11 13 3 6 14
Planting date: 05/31/94
Fertilization: preplant 65-65-65
sidedress 68-0-0
Harvest date: grain 09/28/94
silage 09/01/94
1/ Temperate variety
2/ Rating scale: 1=none, 5=severe
Table 26.Evaluation of forage sorghum varieties at the Coastal Plains Branch Station, Newton, MS.
Silage yield @ 35% dry matter 5 Year
Hybrid Brand 1990 1991 1992 1993 1994 average
----------------------------------------------------ton/A--------------------------
NK300 Northrup King 6.9 13.5 20.4 22.2 17.6 16.2
102F Deltapine 8.3 14.8 24.7 19.9 19.6 17.4
FS-2 DeKalb 12.0 14.8 16.9 14.6 15.8 14.8
-----------------------------------------------------------------------------------
Mean 9.1 14.4 20.7 18.9 17.7 16.1
LSD (0.05) 1.4 NS 5.0 6.5 2.6
CV% 10 17 17 19 8
Planting date: 05/31/94
Fertilization: preplant 65-65-65
sidedress 68-0-0
Harvest date: 09/15/94
Table 27. Nutritional evaluation of silage from tropical corn, temperate corn and forage sorghum at the Coastal Plains Branch Station, Newton, MS, 1994.
Dry matter basis Dry Crude Ether Hybrid Brand pH matter protein extract ADF1/ NDF2/ Lignin NSC3/ TDN4/ NEL5/ ---------------------------------------------------------------%----------------------------------MCal/lb TROPICAL CORN X9255 Cargill 4.02 43.67 7.41 2.11 33.43 49.83 3.94 34.6 62.77 0.65 XL 678C DeKalb 3.74 28.53 7.38 1.91 36.47 53.32 5.12 31.4 60.49 0.62 375T Oro 3.77 34.66 7.81 2.00 36.58 53.12 4.04 31.0 60.40 0.62 X304C Pioneer 3.71 28.70 7.60 1.72 35.74 52.68 3.59 32.0 61.04 0.63 3085 Pioneer 3.80 35.45 7.92 2.39 32.66 47.08 3.98 36.8 63.35 0.65 3098 Pioneer 3.84 34.86 8.28 2.79 33.74 49.91 3.45 33.0 62.53 0.64 Mean 3.81 34.31 7.73 2.15 34.77 50.99 4.02 33.1 61.78 0.63 TEMPERATE CORN McNair 508 Northrup King 3.96 36.13 8.30 2.69 35.39 50.79 4.86 32.2 61.30 0.63 G 4868 Deltapine 3.94 36.19 7.90 2.21 36.28 51.03 4.83 32.8 60.63 0.62 Mean 3.95 36.16 8.10 2.45 35.83 50.91 4.04 32.5 60.97 0.63 SORGHUM NK300 Northrup King 4.19 40.45 6.07 2.28 38.31 50.97 6.15 34.6 59.11 0.60 FS-2 DeKalb 3.89 27.22 6.59 2.36 37.86 53.15 4.60 31.9 59.44 0.61 102F Deltapine 4.05 36.50 5.61 2.45 39.33 51.59 5.87 34.3 58.34 0.60 Mean 4.04 34.72 6.09 2.36 38.50 51.90 5.54 33.6 58.96 0.60 --------------------------------------------------------------------------------------------------------- 1/ ADF = Acid Detergent Fiber 2/ NDF = Neutral Detergent Fiber 3/ NSC = Non-Structural Carbohydrates 4/ TDN = Total Digestible Nutrients 5/ NEL = Net Energy for Lactation