Corn for Silage VARIETY TRIALS, 2001 MISSISSIPPI. Mississippi Agricultural & Forestry Experiment Station. Information Bulletin 380 November 2001

Transcription

1 Information Bulletin 380 November 200 MISSISSIPPI Corn for Silage VARIETY TRIALS, 200 Vance H. Watson, Director Mississippi Agricultural & Forestry Experiment Station Malcolm A. Portera, President Mississippi State University J. Charles Lee, Vice President

2 NOTICE TO USER This Mississippi Agricultural and Forestry Experiment Station Information Bulletin is a summary of research conducted under project number MIS 44 at locations shown on the map on the second page. It is intended for colleagues, cooperators, and sponsors. The interpretation of data presented in this publication may change after additional experimentation. This information is not to be construed either as a recommendation for use or as an endorsement of a specific variety or product by Mississippi State University or the Mississippi Agricultural and Forestry Experiment Station. This report contains data generated as part of the Mississippi Agricultural and Forestry Experiment Station research program. Joint sponsorship by the organizations listed on page 6 is gratefully acknowledged. Trade names of commercial products used in this report are included only for clarity and understanding. All available names (i.e., trade names, code numbers, chemical names, etc.) of varieties or products used in this research project are listed on page 6.

3 Mississippi Corn for Silage Variety Trials, 200 Thomas R. Vaughan Manager, Foundation Seed Stocks Mississippi State University Blair Boyd Operation Coordinator Brown Loam Branch Experiment Station Billy B. Johnson Senior Research Assistant Coastal Plain Branch Experiment Station Clarence Watson MAFES Statistician Mississippi State University Bernie White Manager, Variety Evaluations Mississippi State University For more information, contact Vaughan at (662) ; , Recognition is given to Jessie Selvie and Jerry Nail, research technicians for the Variety Testing Program, for their assistance in packaging, planting, harvesting, and recording plot data. Statistical analyses and computing assistance were provided by Robert Goss, a student worker in the Experimental Statistics Unit. This publication was prepared by Jimmie Cooper, administrative secretary for MAFES Research Support Units. Information Bulletin 380 was published by the Office of Agricultural Communications, a unit of the Mississippi State University Division of Agriculture, Forestry, and Veterinary Medicine.

4 MSU MAFES HEADQUARTERS Starkville BROWN LOAM BRANCH Raymond (Abandoned) COASTAL PLAIN BRANCH Newton Corn Hybrids for Silage TEST LOCATIONS

5 Mississippi Corn for Silage Variety Trials, 200 PROCEDURES The 200 corn hybrids trials for silage were conducted at three locations on Experiment Station land Mississippi State University, Coastal Plain Branch Experiment Station at Newton, and Brown Loam Branch Experiment Station at Raymond (see the map on the previous page). Two experiments were planted at each location. However, due to an extended period of untimely and continuous rainfall immediately prior to harvest, the test at the Brown Loam Branch location was abandoned. One experiment was designed to determine silage yield and various components of forage quality, while the other experiment was designed to determine grain yield of each hybrid. In the silage yield experiment, plots consisted of two 25-foot-long rows, which were spaced 38 inches apart at MSU and 30 inches apart at Newton. The grain yield experiment was identical in row spacing to the silage tests, but row length was 6.75 feet. Experimental design was a randomized complete block with four replications at each location. Seeds of all entries were supplied by participating companies and packaged for planting at rates of 24,000 or 28,000 seeds per acre as specified. A four-row planter equipped with 3 cell cone units was used for planting. Established stands were not thinned. Nitrogen, phosphorus, potassium, and lime were applied according to soil test recommendations. Weeds were controlled by cultivation and/or herbicides currently registered for use on corn with strict adherence to all label instructions. Lorsban was donated by Dow Elanco and banded at planting for insect control. Silage was harvested with a two-row silage harvester, and the biomass from the entire plot was blown into an automatic weigh wagon. Chopped samples were collected from each plot for dry matter and forage quality determinations. Samples were placed in a forced draft oven at 40 o F until dry. Estimates for forage quality determined in these trials were crude protein, acid detergent fiber, estimated total digestible nutrients, net energy lactation, net energy gain, and net energy maintenance. Mineral analyses were made for calcium, phosphorus, magnesium, and potassium. An Almaco SPC-20 plot combine was used to harvest the grain yield experiments. The harvested grain was weighed, the moisture content was determined, and grain yields were converted to bushels per acre at 5 percent moisture. Mississippi Agricultural and Forestry Experiment Station

6 MISSISSIPPI STATE UNIVERSITY, STARKVILLE Crop Summary Growing conditions were generally good this year with only minor periods of drought stress and high temperatures. Soil type Leeper silty clay loam Soil ph Soil fertility P = H+; K = L Fertilizer added Fall 20 lb/a Preplant (32%) 50 lb/a Sidedress (32%) 50 lb/a Herbicide application... Preemergence Bicep II 2.5 qt/a Postemergence oz/a Previous crop Corn Planting date April 9 Harvest date (Silage) July 23 (Grain) September 4 Rainfall Summary Inches April May June July August Total Inches Rainfall Days of the Month April May June July August Table. Silage yield, grain yield, crude protein, and acid detergent fiber content of eight corn hybrids grown at Mississippi State University, Starkville, Mississippi, 200. Hybrid Brand Silage Grain Crude Acid detergent yield yield protein fiber tons/a bu/a pct pct 30F33 Pioneer N9-R9 Syngenta B3 Pioneer Dyna-Gro DK697 DEKALB SS060 Southern States SS859CL Southern States J56 Pioneer Overall Mean LSD (.0) CV (%) R 2 (%) At 35 percent dry matter. 2 Mississippi Corn for Silage Variety Trials, 200

7 Table 2. Forage quality estimates for eight corn hybrids grown at Mississippi State University, Starkville, Mississippi, 200. Hybrid Brand NE lactation NE gain NE maintenance TDN estimate MC/cwt MC/cwt MC/cwt pct 30F33 Pioneer N9-R9 Syngenta B3 Pioneer Dyna-Gro DK697 DEKALB SS060 Southern States SS859CL Southern States J56 Pioneer Overall Mean LSD (.0) CV (%) R 2 (%) Analysis values are based on composite samples; NE = net energy, TDN = total digestible nutrients. Table 3. Phosphorus, calcium, potassium, and magnesium content of eight corn hybrids grown at Mississippi State University, Starkville, Mississippi, 200. Hybrid Brand Percent silage mineral content P CA K MG 30F33 Pioneer N9-R9 Syngenta B3 Pioneer Dyna-Gro DK697 DEKALB SS060 Southern States SS859CL Southern States J56 Pioneer Overall Mean LSD (.0) CV (%) R 2 (%) Mississippi Agricultural and Forestry Experiment Station 3

8 MAFES COASTAL PLAIN BRANCH, NEWTON Crop Summary Temperatures were within the normal range when the test was planted. Adequate soil moisture and soil temperature permitted a timely planting and crop emergence. The crop progressed normally until conditions turned dry from mid-april through late May, when rains came as needed. The crop looked good and was above average up until harvest time. At crop maturity, frequent rains and wind for a 2- to 3-week period delayed grain harvest, causing significant yield losses in some plots. Deer were a major problem and caused lodging in some plots. Rainfall Summary Inches April May June July August September Total Soil type Prentiss very fine sandy loam Soil ph Soil fertility P = H; K = H Fertilizer added Preplant 50 lb/a + 00 lb/a Sidedress N-Sol 50 lb/a Herbicide application... 2 qt/a + 24 oz/a Previous crop Corn Planting date April 3 Harvest date (Silage) July 24 (Grain) September 0 Inches Rainfall Days of the Month April May June July Aug. Sept. Table 4. Silage yield, grain yield, crude protein, and acid detergent fiber content of eight corn hybrids grown at Newton, Mississippi, 200. Hybrid Brand Silage Grain Crude Acid detergent yield yield protein fiber tons/a bu/a pct pct 33J56 Pioneer B3 Pioneer N9-R9 Syngenta DK697 DEKALB SS060 Southern States F33 Pioneer Dyna-Gro SS859CL Southern States Overall Mean LSD (.0) CV (%) R 2 (%) ˇ At 35 percent dry matter. 4 Mississippi Corn for Silage Variety Trials, 200

9 Table 5. Forage quality estimates for eight corn hybrids grown at Newton, Mississippi, 200. Hybrid Brand NE lactation NE gain NE maintenance TDN estimate MC/cwt MC/cwt MC/cwt pct 33J56 Pioneer B3 Pioneer N9-R9 Syngenta DK697 DEKALB SS060 Southern States F33 Pioneer Dyna-Gro SS859CL Southern States Overall Mean LSD (.0) CV (%) R 2 (%) Analysis values are based on composite samples; NE = net energy, TDN = total digestible nutrients. Table 6. Phosphorus, calcium, potassium, and magnesium content of eight corn hybrids grown at Newton, Mississippi, 200. Hybrid Brand Percent silage mineral content P CA K MG 33J56 Pioneer B3 Pioneer N9-R9 Syngenta DK697 DEKALB SS060 Southern States F33 Pioneer Dyna-Gro SS859CL Southern States Overall Mean LSD (.0) CV (%) R 2 (%) Mississippi Agricultural and Forestry Experiment Station 5

10 Table 7. Characteristics of hybrids in the Mississippi Corn Silage Trials, 200. Company Hybrid Planting rate Days to Grain MDIV MCDV (X 000) maturity texture resistance 2 resistance 2 Monsanto DK M 300 Sycamore Rd. Dekalb, IL Pioneer Hi-Bred Intl. 33J M MR MR 6767 Old Madison Pike 3B M MS MS Suite 0 30F Huntsville, AL Southern States Coop SS 859CL 28 8 M MR MR P.O. Box SS West Broad St. Richmond, VA Syngenta Seeds N9-R Sangria Drive Hattiesburg, MS UAP Mid-South H MR MR 57 Germantown Court Suite 200 Cordova, TN M = Medium; H = Hard; and MH = Medium Hard. 2 MDIV = Maize Dwarf Mosaic Virus; MCDV = Maize Chlorotic Dwarf Virus (corn stunt); S = Susceptible; R = Resistant; and MR = Moderately Resistant. 6 Mississippi Corn for Silage Variety Trials, 200

11 Printed on Recycled Paper Mention of a trademark or proprietary product does not constitute a guarantee or warranty of the product by the Mississippi Agricultural and Forestry Experiment Station and does not imply its approval to the exclusion of other products that also may be suitable. Mississippi State University does not discriminate on the basis of race, color, religion, national origin, sex, age, disability, or veteran status. 6862/600