Corn Silage C.C. Sheaffer, P.R. Peterson and D.R. Swanson Varietal Trials Results, January 2007

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1 Corn Silage C.C. Sheaffer, P.R. Peterson and D.R. Swanson Varietal Trials Results, January 007 The Minnesota Hybrid Corn Silage Evaluation Program evaluates the silage potential of corn hybrids in Minnesota. The goal of the program is to provide unbiased forage yield and quality information for educational and marketing programs. The program is financed in part by entry fees from private seed companies that chose to enter hybrids for testing; they are listed in this publication. Results presented are from corn silage performance trials in regions of extensive corn silage use: southeastern, central and west-central Minnesota. The locations are in important dairy regions. Test Sites Silage hybrids entered in the southeast or central region trials were tested at two sites within each region. Hybrids entered in the westcentral region were tested at one site. Sites within regions were as follows: Southeast Dairy Region: La Crescent (Houston County) Potsdam (Olmsted County) Central Dairy Region: Paynesville (Stearns County) Melrose (Stearns County) West-Central Dairy Region: Ottertail, MN (Otter Tail County) Test Procedure (Southeast and Central) Design: Plots were established at La Crescent, Potsdam, Paynesville and Melrose in randomized complete block designs with four replications. Hybrids were planted at,000 seeds per acre with 0-inch row spacing on April 7 and 8 at the SE sites (La Crescent and Potsdam) and May 4 and 9 at the Central sites (Paynesville and Melrose). Plant nutrients as manure or inorganic fertilizer were applied according to University of Minnesota recommendation. Cultivation and herbicides applied by University of Minnesota recommendation were used to control weeds. Harvesting: Plots were harvested and whole-plant herbage sampled for dry matter and forage quality at each site. Each test site was harvested when the average whole-plant moisture across entries was estimated to be 65%. In 006, harvest dates at La Crescent, Potsdam, Melrose and Paynesville were September 5, September, September 7 and September 5, respectively. (West-Central) Design: Plots were established May near Ottertail under centerpivot irrigation in a randomized complete block design with three replications. Hybrids were planted at a 0,800 seeds per acre with 0- inch row spacing. Fertilizer was applied at a pre-plant rate of 5 tons dry manure per acre. Pre-emergent herbicide was applied to control weeds. Harvesting: Plots were harvested and whole-plant herbage sampled for yield and forage quality on September 5. Companies participating in 006 hybrid corn silage performance trials. Dairyland Seed Company, Inc., P.O. Box 958, West Bend, WI 5095 Dyna Gro Seed Company, W Lake Lansing Rd Suite 0, East Lansing, MI 488 Epley Bros. Hybrids, Inc., P.O. Box 0, Shell Rock, IA Garst Seed Company, 69 0th St, Slater, IA 5044 Gold Country Seed, Inc., 6506 Hwy 5 North, P.O. Box 604, Hutchinson, MN 5550 Golden Harvest Seeds, Inc., 00 JC Robinson Blvd, P.O. Box 07, Waterloo, NE Hyland Seeds, Hyland Drive, Blenheim, Ontario, Canada N0P A0 Legacy Seeds, Inc., 0 Pine Street, Waupaca, WI 5498 Monsanto Seed Group, Dekalb Genetics, 00 Sycamore Road, DeKalb, IL 605 Mycogen Seeds, 90 Zionsville Rd, Indianapolis, IN 4668 Nu Tech Seed Co., 07 rd Street, Alice, ND 580 Pioneer Hi-Bred, International, 7000 NW 6nd Ave, Johnston, IA 50 Producers Hybrids, P.O. Box C, Battle Creek, NE 6875 Syngenta Seeds, Inc. (NK), 7500 Olson Memorial Highway, Golden Valley, MN 5547 Trelay Seeds, 6 State Road 80N, Livingston, WI

2 Results Provided Tables -5 summarize hybrid yield and forage quality results from La Crescent, Potsdam, Paynesville, Melrose and Ottertail, respectively. Moisture content, whole-plant dry matter (DM) yield and silage yield are listed, and hybrids are ranked in descending order of milk yield per acre (Milk Yield, lb/acre). In 006 drought conditions at Melrose resulted in lower yields and uneven grain development at that site, but had little effect at the Paynesville site. Whole-plant forage quality traits listed include crude protein (CP), neutral detergent fiber (NDF), 48- hour in vitro digestibility (IVD), 48- hour neutral detergent fiber digestibility (NDFD), and starch concentration. With the exception of NDFD, all forage quality traits are expressed as a percent of dry matter. NDFD is expressed as a percent of NDF. Milk production potentials per ton (lb milk/ton forage) and per acre (lb milk/acre forage) of forage were calculated using the new spreadsheet MILK006 developed by the University of Wisconsin. MILK006 approximates animal performance based on a standard cow weight and milk production level (,50 lb body weight and 90 lb/day at.8% fat). Values based on field calculations for hybrid moisture and DM yield; laboratory values for CP, NDF, NDFD, starch and ash concentration; and book values for NDFCP (.%) and ether extract (.%) concentration were used for spreadsheet calculations. For MILK006 predictions, we assumed that kernel processing occurred. How To Use Results NDF is a negative indicator of forage intake potential; higher NDF concentration generally implies lower animal performance potential. IVD provides an estimate of forage dry matter digestibility, and NDFD estimates digestibility of the fiber fraction. Starch concentration is positively associated with digestibility because starch is assumed to be 00% digestible. Relatively higher IVD, NDFD and/ or starch concentrations generally imply greater animal performance potential. Milk yield per acre represents the combined effects of yield and quality. Corn hybrids differed in yield, forage quality, and milk production potential at all sites. Means and least significant difference (LSD) values at the 0% probability level are shown for each parameter at each site. Where the difference between two hybrids for a particular trait and site is greater than the LSD value, there is a 90% probability that there is a real difference between the two hybrids for that parameter (i.e. moisture, yield, quality concentration or milk production). Table. Relative maturity (RM), whole-plant moisture (Moist), dry matter and silage yield, and quality traits for corn hybrids planted at La Crescent (Houston County) in 006. Pioneer 5A ,50 6,600 Mycogen TMFM ,50 6,400 Dekalb DKC ,60 6,00 Legacy Seeds L ,470 6,00 Garst Seed 8579 GT ,560 5,700 NK Brand N58-L ,500 5,500 Dairyland Stealth ,440 5,00 Pioneer 4A ,70 4,900 NK Brand N65-C ,670 4,00 Dekalb DKC ,70,900 Pioneer 4A ,90,400 Golden Harvest H-88CB ,640,00 Trelay 5B ,40,000 Epley Brothers Hybrids E ,550,00 Producers Hybrids 644 YGCB RR ,0,00 Dekalb DKC ,80,000 Dairyland HiDF ,470,800 Dekalb DKC ,70,800 Mycogen TMFQ ,80,400 Pioneer 5Y ,470,00 Dairyland Stealth ,50,000 Gold Country 00-04CBR ,50,000 Pioneer T ,0,000 NK Brand N5-W ,0 0,400 5

3 Table. Relative maturity (RM), whole-plant moisture (Moist), dry matter and silage yield, and quality traits for corn hybrids planted at La Crescent (Houston County) in 006 (continued). Garst Seed 8677 GT ,440 9,900 Pioneer 5F ,0 9,700 Trelay 6K ,0 9,600 Mycogen TMFT ,970 9,400 Garst Seed 8688 GT ,40 8,500 Trelay 6R ,60 8,00 Dyna Gro DG55P ,40 7,700 NK Brand N5-T ,0 7,600 Legacy Seeds L-6600 BMR ,0 7,00 Dyna Gro DG56P ,0 6,500 Epley Brothers Hybrids E5SR ,000 6,00 Mycogen FF ,590 5,900 Producers Hybrids SS 04 RR ,80 4,700 Mean ,40,400 LSD(0.0) ,400 CV text for additional information. Milk production was estimated using spreadsheet MILK006 developed at the University of Wisconsin. Refer to Results Provided text for additional information. Table. Relative maturity (RM), whole-plant moisture (Moist), dry matter and silage yield, and quality traits for corn hybrids planted at Potsdam (Olmsted County) in 006. Producers Hybrids SS 04 RR ,600 4,400 Gold Country 00-04CBR ,700 4,00 Mycogen TMFM ,650 40,400 NK Brand N5-W ,760 40,00 Pioneer 5Y ,770 40,00 Pioneer 5A ,70 9,800 Dairyland Stealth ,670 9,400 Mycogen TMFQ ,660 9,400 Pioneer T ,700 9,400 Garst Seed 8579 GT ,770 8,900 Dekalb DKC ,60 7,900 Trelay 6R ,670 7,600 Mycogen TMFT ,560 7,00 Pioneer 4A ,60 7,000 NK Brand N58-L ,80 6,900 Dairyland HiDF ,650 6,800 Dekalb DKC ,680 6,600 Golden Harvest H-88CB ,770 6,600 Dairyland Stealth ,800 6,400 Pioneer 4A ,770 6,00 Dyna Gro DG55P ,640 6,00 NK Brand N65-C ,70 5,800 Trelay 6K ,670 5,600 Legacy Seeds L ,50 5,00 NK Brand N5-T ,640 5,000 Producers Hybrids 644 YGCB RR ,70 5,000 Dekalb DKC ,650 4,400 Garst Seed 8688 GT ,780 4,400 6

4 Table. Relative maturity (RM), whole-plant moisture (Moist), dry matter and silage yield, and quality traits for corn hybrids planted at Potsdam (Olmsted County) in 006 (continued). Epley Brothers Hybrids E ,70 4,00 Trelay 5B ,550,600 Dekalb DKC ,50,400 Dyna Gro DG56P ,560,400 Pioneer 5F ,700,00 Garst Seed 8677 GT ,690,700 Epley Brothers Hybrids E5SR ,080,00 Legacy Seeds L-6600 BMR ,70 8,400 Mycogen FF ,70 4,00 Mean ,660 6,00 LSD (0.0) ,900 CV Milk production was estimated using spreadsheet MILK006 developed at the University of Wisconsin. Refer to Results Provided Table. Relative maturity (RM), whole-plant moisture (Moist), dry matter and silage yield, and quality traits for corn hybrids planted at Paynesville (Stearns County) in 006. Pioneer 5A ,560 6,500 Hyland Seeds HL B ,60 5,00 Pioneer 4A ,40 4,00 Dairyland HiDF ,50,800 Hyland Seeds HL B5R ,550,900 Trelay 5K ,50,600 Garst Seed 8688 GT ,540,400 Pioneer 5F ,50,400 Dairyland Stealth ,70,00 Hyland Seeds HL B ,40,00 Legacy Seeds L-467 RR,Bt ,440 0,800 Trelay 6R ,50 0,00 NK Brand B46-N ,40 0,00 NK Brand N47-F ,50 9,400 Hyland Seeds HL ,50 9,00 NK Brand N8-B ,80 9,00 Trelay 5N ,50 9,00 Producers Hybrids 56 RR ,400 9,00 Legacy Seeds L-85 RR,Bt ,400 8,800 Mycogen TMFH ,90 8,800 Garst Seed 8866 RR ,50 8,700 Pioneer 8H ,40 8,600 Hyland Seeds HL S ,50 8,500 Gold Country 00-04CBR ,50 8,00 Trelay 4B ,50 8,00 Dekalb DKC ,400 7,900 Pioneer 5Y ,0 7,600 Mycogen TMFN ,0 7,400 Oekalb DKC ,60 7,00 NK Brand N6-J ,0 7,00 Dekalb DKC ,80 6,500 Producers Hybrids SS 96 RR ,060 6,400 7

5 Table. Relative maturity (RM), whole-plant moisture (Moist), dry matter and silage yield, and quality traits for corn hybrids planted at Paynesville(Stearns County) in 006 (continued). Hyland Seeds HL B4R ,40 6,00 Hyland Seeds HL ,50 6,00 NK Brand N48-R ,70 6,00 Dekalb DKC ,70 5,00 Legacy Seeds L-97 RR,Bt ,0 4,400 NK Brand N9-K ,90,800 Hyland Seeds HL S ,790,000 Hyland Seeds HL S ,740,00 Dekalb DKC ,0 9,900 Mean ,0 8,600 LSD (0.0) ,700 CV Milk production was estimated using spreadsheet MILK006 developed at the University of Wisconsin. Refer to Results Provided Table 4. Relative maturity (RM), whole-plant moisture (Moist), dry matter and silage yield, and quality traits for corn hybrids planted at Melrose (Stearns County) in 006. Hyland Seeds HL S ,50,00 Producers Hybrids SS 96 RR ,490,00 Hyland Seeds HL B4R ,60 0,900 Dairyland Stealth ,60 0,600 Gold Country 00-04CBR ,640 9,800 Dekalb DKC ,680 9,700 Pioneer 5A ,0 9,700 Garst Seed 8688 GT ,400 9,00 Trelay 4B ,680 9,00 Dekalb 5-9eKalb ,650 8,700 Dekalb DKC ,00 8,00 Pioneer 4A ,40 8,00 Dekalb DKC ,590 8,000 Trelay 6R ,50 7,700 Pioneer 5F ,700 7,500 NK Brand N47-F ,50 7,00 Producers Hybrids 56 RR ,640 7,00 Garst Seed 8866 RR ,400 6,900 Hyland Seeds HL B5R ,480 6,900 Dekalb DKC ,0 6,700 Pioneer 5Y ,0 6,700 Legacy Seeds L-97 RR,Bt ,40 6,00 Mycogen TMFN ,550 6,00 Legacy Seeds L-467 RR,Bt ,70 5,800 Hyland Seeds HL B ,000 5,600 NK Brand N8-B ,570 5,600 Hyland Seeds HL ,00 5,400 Hyland Seeds HL ,080 4,900 Trelay 5K ,0 4,800 Dairyland HiDF ,00 4,700 Legacy Seeds L-85 RR,Bt ,570 4,700 NK Brand N6-J ,60 4,00 8

6 Table 4. Relative maturity (RM), whole-plant moisture (Moist), dry matter and silage yield, and quality traits for corn hybrids planted at Melrose (Stearns County) in 006 (continued). Hyland Seeds HL B ,40 4,00 NK Brand N48-R ,70 4,00 NK Brand N9-K ,460 4,000 Trelay 5N ,90,800 Hyland Seeds HL S ,480,500 Pioneer 8H ,0,000 Hyland Seeds HL S ,480,700 NK Brand B46-N ,050,500 Mycogen TMFH ,70 0,00 Mean ,40 6,500 LSD (0.0) ns ns ,800 CV Milk production was estimated using spreadsheet MILK006 developed at the University of Wisconsin. Refer to Results Provided Table 5. Relative maturity (RM), whole-plant moisture (Moist), dry matter and silage yield, and quality traits for corn hybrids planted at Ottertail (Otter Tail County) in 006. Nu Tech QFO ,0,500 Pioneer 8B ,50 0,400 Dekalb DKC ,50 9,400 Pioneer 7A ,70 8,00 NK Seed N-H ,90 8,00 Dekalb DKC ,70 7,500 Hyland HL S ,000 6,500 Pioneer 8H ,80 6,400 Pioneer 8W ,50 5,700 Hyland HL S ,0 5,00 Nu Tech QFO ,80 4,800 Nu Tech QFO ,90 4,500 Hyland HL S ,90,900 Mean ,90 7,00 LSD (0.0) ns ,900 CV Milk production was estimated using spreadsheet MILK006 developed at the University of Wisconsin. Refer to Results Provided 9