Conservation, fiber digestibility, and nutritive value of corn harvested at 2 cutting heights and ensiled with fibrolytic enzymes, either alone or with a ferulic acid esterase-producing inoculant
- 1 February 2015
- journal article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 98 (2), 1214-1224
- https://doi.org/10.3168/jds.2014-8768
Abstract
The aim of this study was to determine the effects of the use of a fibrolytic enzyme product, applied at ensiling either alone or in combination with a ferulic acid esterase-producing bacterial additive, on the chemical composition, conservation characteristics, and in vitro degradability of corn silage harvested at either conventional or high cutting height. Triplicate samples of corn were harvested to leave stubble of either a conventional (15cm; NC) or high (45cm; HC) height above ground. Sub-samples of chopped herbage were ensiled untreated or with a fibrolytic enzyme product containing xylanases and cellulases applied either alone (ENZ) or in combination with a ferulic acid esterase-producing silage inoculant (ENZ+FAEI). The fibrolytic enzyme treatment was applied at 2mL of enzyme product/kg of herbage dry matter (DM), and the inoculant was applied at 1.3×10(5) cfu/g of fresh herbage. Samples were packed into laboratory-scale silos, stored for 7, 28, or 70 d, and analyzed for fermentation characteristics, and samples ensiled for 70 d were also analyzed for DM losses, chemical composition, and in vitro ruminal degradability. After 70 d of ensiling, the fermentation characteristics of corn silages were generally unaffected by cutting height, whereas the neutral detergent fiber, acid detergent fiber, and ash concentrations were lower and the starch concentration greater for silages made with crops harvested at HC compared with NC. After 70 d of ensiling, the acetic acid, ethanol concentrations, and the number of yeasts were greater, and the pH and neutral detergent fiber concentrations were lower, in silages produced using ENZ or ENZ+FAEI than the untreated silages, whereas ENZ+FAEI silages also incurred higher DM losses. No effect of additive treatment was observed on in vitro degradability indices after 48h ruminal incubation. The use of a fibrolytic enzyme product, either alone or in combination with a ferulic acid esterase-producing inoculant, at ensiling did not improve corn silage fermentation or its nutritive value and resulted in some negative effects on these parameters. The effects of using a fibrolytic enzyme product at ensiling, either alone or in combination with a ferulic acid esterase-producing inoculant, did not differ between corn harvested at either NC or HC. Silage made from HC had a greater starch content and lower fiber content than NC silage, whereas cutting height did not affect the in vitro digestibility indices.Keywords
Funding Information
- Alberta Livestock and Meat Agency Ltd (LOI 2012CO13R)
This publication has 28 references indexed in Scilit:
- Effects of exogenous enzymes on in vitro gas production kinetics and ruminal fermentation of four fibrous feedsAnimal Feed Science and Technology, 2013
- A third-generation esterase inoculant alters fermentation pattern and improves aerobic stability of barley silage and the efficiency of body weight gain of growing feedlot cattle1Journal of Animal Science, 2012
- Relationship between enzymic activities and in vitro degradation of alfalfa hay and corn silageAnimal Feed Science and Technology, 2008
- Use of an in vitro fermentation bioassay to evaluate improvements in degradation of alfalfa hay due to exogenous feed enzymesAnimal Feed Science and Technology, 2007
- Potential for selection to improve efficiency of feed use in beef cattle: a reviewAustralian Journal of Agricultural Research, 1999
- The effects of ensiling whole crop maize with a multi‐enzyme preparation on the chemical composition of the resulting silagesJournal of the Science of Food and Agriculture, 1992
- The detrimental effects of air on silageJournal of Applied Bacteriology, 1990
- Interactions between Treponema bryantii and cellulolytic bacteria in the in vitro degradation of straw celluloseCanadian Journal of Microbiology, 1987
- Ammonium determination in soil extracts by the salicylate methodCommunications in Soil Science and Plant Analysis, 1986
- The buffering capacity of pasture plants with special reference to ensilageAustralian Journal of Agricultural Research, 1964