Adsa Logo White Adsa Title White

The effects of cut height and fungicide application on whole-plant corn silage yield.

F. F. Cardoso

Events

06-23-2020

Join F. F. Cardoso on this page for a live text chat!
6:00 PM - 8:00 PM GMT

Abstract:

T107
The effects of cut height and fungicide application on whole-plant corn silage yield.
F. F. Cardoso*1, S. E. Kemp1, R. Schmidt2, F. C. Cardoso1. 1University of Illinois Urbana, IL, 2Lallemand Animal Nutrition Milwaukee, WI.

Whole-plant corn silage (WPCS) is an indispensable forage in the diet of dairy cows due to its high-energy content. However, the amount of energy available to the cow depends on the quality of the WPCS. The objective of this study was to determine the effects of harvest cut height and foliar fungicide application on brown mid-rib (BMR) WPCS yield. Foliar fungicide (pyraclostrobin, C19H18ClN3O4 + metconazole, C17H22ClN3O; Headline AMP, BASF, Florham Park, NJ) treatments were randomly assigned to 1 of 24 0.21-ha plots. Treatments were assigned in a completely randomized block split-plot design as follows: control (CON) receiving no fungicide application and fungicide (FUN) receiving one application applied at the vegetative tassel stage (VT). Once corn reached growth stage R5, plants were collected, chopped, and tested for dry matter (DM) until all plots were at the 32—35% DM range. At a theoretical chop length of 2 cm [John Deere 8370 and a Dion F-41 Silage Chopper with kernel processor (1 mm)], corn was harvested 4 rows at a time at 2 separate cut heights low-cut (LC; 30.5 cm) and high-cut (HC; 56 cm). WPCS was collected right off the chopper as silage was being loaded into a horizontal silo bag. Dry matter of the WPCS was higher for FUN compared with CON (32.0% and 31.12%, respectively; P = 0.02). Gross yield of WPCS was lower for HC compared with LC (21,224 and 25,083 kg/ha, respectively; P < 0.0001) with no fungicide effect (P = 0.67). Dry matter yield of WPCS was lower for HC compared with LC (6,702 and 7,913 kg/ha; P < 0.0001) with no fungicide effect (P = 0.25). There was no interaction between height and FUN (P > 0.15). In conclusion, fungicide application had an effect on DM of WPCS and cut-height interfered with WPCS yield.

Keywords: whole-plant corn silage, fungicide, yield.