DIRECT-CUT HARVEST AND STORAGE OF ALFALFA ON THE DAIRY FARM

A simulation model of the dairy forage system (DAFOSYM) was used to study the long-term performance and economics of direct-cut alfalfa harvest and storage, with a treatment such as formic acid, to enhance preservation. Compared to a wilted silage system, total losses were not reduced substantially with the direct-cut system in Michigan. Handling of the wetter material increased machinery, fuel, and labor costs for transport and feeding. Even with no added cost for forage treatment and effluent handling, the direct-cut system was not economical. Direct-cut harvest with a treatment like formic acid was more economical than wilted silage only if a 3% increase in animal intake and milk production was attained — a scenario not supported through feeding trials. Development of a system for direct-cut harvest and preservation of alfalfa for the midwestern and northeastern U.S. appears infeasible considering known technology.

[1]  R. G. Koegel,et al.  Consolidation and Compaction Characteristics of Macerated Alfalfa used for Silage Production , 1988 .

[2]  F. Gordon,et al.  Effect of harvesting system on nutrient losses during silage making. 2. In‐silo losses , 1986 .

[3]  C. A. Rotz,et al.  ROTARY POWER REQUIREMENTS FOR HARVESTING AND HANDLING EQUIPMENT , 1992 .

[4]  P. Savoie,et al.  Economics of Swath Manipulation During Field Curing Of Alfalfa , 1990 .

[5]  C. A. Rotz,et al.  A Comprehensive Model of Forage Changes in the Silo , 1989 .

[6]  R. G. Koegel,et al.  Economics of Maceration and Mat Drying of Alfalfa on Dairy Farms , 1990 .

[7]  R. Miller,et al.  Growth, Intake, and Digestibility from Formic Acid Silage versus Hay , 1969 .

[8]  W. L. Kjelgaard,et al.  Energy and Time Needs in Forage Systems , 1979 .

[9]  R. Pitt,et al.  Modeling the Effects of Formic Acid and Molasses on Ensilage , 1988 .

[10]  W. Greenhill PLANT JUICES IN RELATION TO SILAGE FERMENTATION III. Effect of water activity of juice , 1964 .

[11]  G. Broderick,et al.  Effect of formic acid or formaldehyde treatment of alfalfa silage on nutrient utilization by dairy cows. , 1992, Journal of dairy science.

[12]  R. E. Pitt,et al.  Mathematical Prediction of Density and Temperature of Ensiled Forage , 1983 .

[13]  R. P. Walgenbach,et al.  Variations in alfalfa buffering capacity , 1985 .

[14]  C. A. Rotz,et al.  DAFOSYM: A Model of the Dairy Forage System , 1989 .

[15]  R. J. Lancaster,et al.  Evaluation of formic acid as an additive for lucerne silage , 1977 .

[16]  C. Alan Rotz,et al.  Economics of Chemically Conditioned Alfalfa on Michigan Dairy Farms , 1985 .

[17]  C. Alan Rotz,et al.  DAFOSYM: A Dairy Forage System Model for Evaluating Alternatives in Forage Conservation , 1989 .

[18]  C. Rotz,et al.  Value of alfalfa losses on dairy farms , 1990 .

[19]  P. Mcdonald,et al.  The biochemistry of silage , 1981 .

[20]  C. H. Gordon,et al.  Effect of formic acid on recovery, intake, digestibility, and growth from unwilted silage. , 1971 .

[21]  R. Pitt,et al.  A model of clostridial dominance in ensilage , 1987 .