Abstract #M159
Section: Forages and Pastures (posters)
Session: Forages and Pastures I
Format: Poster
Day/Time: Monday 7:30 AM–9:30 AM
Location: Exhibit Hall A
Session: Forages and Pastures I
Format: Poster
Day/Time: Monday 7:30 AM–9:30 AM
Location: Exhibit Hall A
# M159
Foliar fungicide application effects on fiber composition of whole plant BMR and floury corn varieties and corn silage ensiled for 0, 30, 90, or 150 days.
Maegan E. Weatherly*1, Russell T. Pate1, Laura Hedges2, Santiago Mideros2, Gary M. Fellows3, Matt Akins4, Michael R. Murphy1, Felipe C. Cardoso1, 1University of Illinois, Department of Animal Sciences, Urbana,IL, 2University of Illinois, Department of Crop Sciences, Urbana,IL, 3B.A.S.F. Corp, Research Triangle Park, NC, 4University of Wisconsin-Madison, Marshfield, WI.
Key Words: fungicide, fiber, corn silage
Foliar fungicide application effects on fiber composition of whole plant BMR and floury corn varieties and corn silage ensiled for 0, 30, 90, or 150 days.
Maegan E. Weatherly*1, Russell T. Pate1, Laura Hedges2, Santiago Mideros2, Gary M. Fellows3, Matt Akins4, Michael R. Murphy1, Felipe C. Cardoso1, 1University of Illinois, Department of Animal Sciences, Urbana,IL, 2University of Illinois, Department of Crop Sciences, Urbana,IL, 3B.A.S.F. Corp, Research Triangle Park, NC, 4University of Wisconsin-Madison, Marshfield, WI.
The objective of this study was to determine the effects of foliar fungicide (FUNG) and ensiling time (0, 30, 90, 150 d) on fiber composition of 2 corn silage (CS) varieties (brown midrib; BMR and floury; FLY). Treatments were assigned to 16 plots in a completely randomized block split-plot design. Treatments were BMR without FUNG, FLY without FUNG, BMR with FUNG, and FLY with FUNG (Headline AMP; BASF Corp., applied at vegetative tassel). Samples of whole plants were collected and separated into leaves, stalks, flag leaf (FL), and cobs. Fresh-cut silage samples were collected at harvest and sealed inside mini silos for the duration of their respective ensiling times. Statistical analysis was performed using the MIXED procedure in SAS (v9.4). No 2- (variety × day, treatment × day, variety × treatment) or 3-way interactions (variety × treatment × day) were observed for stalk, cob, or FL ADF or lignin, or CS NDF, ADF, or lignin (P ≥ 0.11). No effect of treatment was observed for any fiber analyses (P ≥ 0.07). A variety × treatment interaction occurred for leaf lignin content with 7.01, 8.69, 8.85, and 6.59 ± 1.17% DM for BMR/CON, BMR/FUN, FLY/CON, and FLY/FUN, respectively (P = 0.04). Stalks from BMR had lower ADF concentration than stalks from FLY with 43.04 and 47.66 ± 1.02% DM, respectively (P = 0.04). Corn silage NDF was lowest when ensiled for 90 or 150 d with 40.64 and 36.84 vs. 43.22 and 43.41 ± 0.99% DM at 0 and 30 d, respectively (P < 0.0001). BMR corn silage had lower NDF than FLY with 39.73 and 42.32 ± 0.83% DM, respectively (P = 0.005). Corn silage ADF was lowest when ensiled for 90 or 150 d with 20.92 and 19.05 vs. 23.20 and 22.18 ± 0.32% DM at 0 and 30 d, respectively (P < 0.0001). BMR CS had lower ADF than FLY with 20.00 and 22.68 ± 0.19% DM, respectively (P < 0.0001). Lignin was lowest when ensiled for 90 or 150 d with 2.55 and 2.24 vs. 3.16 and 2.85 ± 0.08% DM at 0 and 30 d, respectively (P < 0.0001). BMR corn had lower lignin than FLY with 2.27 and 3.13 ± 0.06% DM, respectively (P < 0.0001). In conclusion, BMR variety or longer ensiling times of CS may result in a more favorable fiber content for dairy cows.
Key Words: fungicide, fiber, corn silage
