Silage Evaluation of Tropical Corn in a Starter-minimum Tillage System

The greatest economic value from a corn (Zea mays L.) crop is obtained when it can be used as silage rather than for grain only. The objectives were to study tropical corn silage yield and quality in relation to starter fertilizer, planting date, corn hybrid, and fall armyworm stress. This study was conducted in the field a t Quincy and Jay, Florida during 1991 and 1992. Results have shown the interaction of tropical corn silage to starter fertilizer and hybrids. Pioneer X304C was a positive changer, DeKalh DK 9101 was a nochanger, and Pioneer 3099 and Cargill X70lTR were negative changers. In 1992, the fall armyworm migrated to Quincy 1month earlier than usual. Some hybrids were not as tolerant to the fall armyworm as others. Late-planted tropical corn resulted in high yields of corn silage. Feed quality 1% CP and in vitro organic matter digestibility (IVOMD)] of tropical corn grain and silage varied in relation to planting date and hybrid.