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

A simulation model of the dairy forage system (DAFOSYM) was used to st udy the long-term performance and economics of direct-cut alfalfa harv est and storage, with a treatment such as formic acid, to enhance pres ervation. Compared to a wilted silage system, total losses were not re duced substantially with the direct-cut system in Michigan. Handling o f the wetter material increased machinery, fuel, and labor costs for t ransport and feeding. Even with no added cost for forage treatment and effluent handling, the direct-cut system was not economical. Direct-c ut harvest with a treatment like formic acid was more economical than wilted silage only if a 3% increase in animal intake and milk producti on was attained - a scenario not supported through fee&ng trials. Deve lopment of a system for direct-cut harvest and preservation of alfalfa for the midwestern and northeastern U. S. appears infeasible consider ing known technology.