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Case Study: Effect of type of processor on corn silage processing score in samples of whole-plant corn silage

      ABSTRACT

      The objective of this study was to evaluate the effect of processor type on fermentation profile, corn silage processing score, and physically effective NDF of whole-plant corn silage samples. A data set composed of 3,900 whole-plant corn silage samples was obtained from Rock River Laboratory (Watertown, WI). All samples were collected from 2013 to 2016 by the Chr. Hansen team under specific protocols to label samples as shredlage (SHRD) only if confirmed by farmers or custom harvesters. A total of 309 and 3,591 samples were labeled as SHRD and nonshredlage (CONV), respectively. Samples had been previously analyzed for corn silage processing score, physically effective NDF, and predicted ruminal in vitro NDF digestibility at 30 h (using near-infrared spectroscopy). In addition, 2,394 samples (272 SHRD and 2,394 CONV) had previously been analyzed via wet chemistry for fermentation profile. Loss of DM during fermentation was calculated with a predictive equation. Data were analyzed using Proc Glimmix in SAS with type of processor (SHRD vs. CONV) as a fixed effect. Statistical significance and trends were declared at P ≤ 0.05 and 0.05 < P < 0.10, respectively. The pH was less (P = 0.01; 3.90 vs. 3.97) for SHRD than CONV, which was related to greater (P = 0.001; 4.89 vs. 4.34% of DM) lactic acid concentrations. Concentrations of acetate, propionate, butyrate, and ethanol did not differ (P > 0.10) and averaged 2.27, 0.35, 0.36, and 0.57%, respectively. Recovery of DM was improved (P = 0.05; 2.42 vs. 2.73%) for SHRD, but the difference is of minor importance. Corn silage processing score was 4.6 percentage units greater for SHRD than for CONV silages (P = 0.001; 68.1 vs. 63.53% starch passing through a 4.75-mm sieve). In contrast, physically effective NDF and predicted ruminal in vitro NDF digestibility were (P = 0.001) 1.8 and 1.6 percentage units greater for CONV. Our results suggest that harvesting whole-plant corn silage as SHRD improved kernel breakage while maintaining adequate fermentation patterns compared with CONV.

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      LITERATURE CITED

        • Adesogan A.T.
        • Krueger N.
        • Salawu M.B.
        • Dead D.B.
        • Staples C.R.
        The influence of treatment with dual purpose bacterial inoculants or soluble carbohydrates on the fermentation and aerobic stability of bermudagrass.
        15377619
        J. Dairy Sci. 2004; 87: 3407-3416
        • Allen M.S.
        Relationship between fermentation acid production in the rumen and the requirement for physically effective fiber.
        9241607
        J. Dairy Sci. 1997; 80: 1447-1462
        • Ferraretto L.F.
        • Fredin S.M.
        • Muck R.E.
        • Shaver R.D.
        Microbial inoculant and ensiling time effects on fermentation profile, nitrogen fractions, and ruminal in vitro and in situ starch digestibility in corn shredlage and late-maturity-corn silage.
        Prof. Anim. Sci. 2016; 32: 861-868
        • Ferraretto L.F.
        • Shaver R.D.
        Effect of corn shredlage on lactation performance and total tract starch digestibility by dairy cows.
        Prof. Anim. Sci. 2012; 28: 639-647
        • Ferraretto L.F.
        • Shaver R.D.
        Meta-analysis: Impact of corn silage harvest practices on intake, digestion and milk production by dairy cows.
        Prof. Anim. Sci. 2012; 28: 141-149
        • Ferreira G.
        • Mertens D.R.
        Chemical and physical characteristics of corn silages and their effects on in vitro disappearance.
        16291633
        J. Dairy Sci. 2005; 88: 4414-4425
        • Goering H.K.
        • Van Soest P.J.
        Forage Fiber Analyses (Apparatus, Reagents, Procedures and Some Applications).
        in: Agric. Res. Serv. USDA, Washington, DC1970 (Agricultural Handbook No. 379)
        • Goeser J.P.
        • Heuer C.R.
        • Crump P.M.
        Forage fermentation product measures are related to dry matter loss through meta-analysis.
        Prof. Anim. Sci. 2015; 31: 137-145
        • Hall M.B.
        • Mertens D.R.
        A 100-year review: Carbohydrates—Characterization, digestion, and utilization.
        29153156
        J. Dairy Sci. 2017; 100: 10078-10093
        • Johnson L.M.
        • Harrison J.H.
        • Davidson D.
        • Robutti J.L.
        • Swift M.
        • Mahanna W.C.
        • Shinners K.
        Corn silage management I: Effects of hybrid, maturity, and mechanical processing on chemical and physical characteristics.
        12018430
        J. Dairy Sci. 2002; 85: 833-853
        • Johnson L.
        • Harrison J.H.
        • Hunt C.
        • Shinners K.
        • Doggett C.G.
        • Sapienza D.
        Nutritive value of corn silage as affected by maturity and mechanical processing: A contemporary review.
        J. Dairy Sci. 1999; 82: 2813-2825
        • Lammers B.P.
        • Buckmaster D.R.
        • Heinrichs A.J.
        A simplified method for the analysis of particle sizes of forage and total mixed rations.
        8792291
        J. Dairy Sci. 1996; 79: 922-928
        • Mertens D.R.
        Creating a system for meeting the fiber requirements of dairy cows.
        9241608
        J. Dairy Sci. 1997; 80: 1463-1481
        • Muck R.E.
        Factors influencing silage quality and their implications for management.
        J. Dairy Sci. 1988; 71: 2992-3002
        • Saxton A.M.
        A macro for converting mean separation output to letter groupings in Proc Mixed.
        in: Proc. 23rd SAS Users Group Int. SAS Inst. Inc., Cary, NC1998: 1243-1246 (in)
        • Vanderwerff L.M.
        • Ferraretto L.F.
        • Shaver R.D.
        Brown midrib corn shredlage in diets for high-producing dairy cows.
        26026754
        J. Dairy Sci. 2015; 98: 5642-5652
        • Zebeli Q.
        • Aschenbach J.R.
        • Tafaj M.
        • Boguhn J.
        • Ametaj B.N.
        • Drochner W.
        Invited review: Role of physically effective fiber and estimation of dietary fiber adequacy in high producing dairy cattle.
        22365188
        J. Dairy Sci. 2012; 95: 1041-1056