Abstract
Differences among corn (Zea mays L.) hybrids for forage quality traits have been reported, but the stability of forage quality differences over diverse environments is not well documented. To evaluate hybrid stability for yield and forage quality, nine commercial hybrids were evaluated at two locations in Pennsylvania in 1990 and one location in 1991. All hybrids were harvested on the same day at the 2/3 milk line to black layer stage, depending on the hybrid. Whole plant and stover sub-samples were collected from each plot, chopped, dried, and ground for analysis. Forage analysis for crude protein (CP), acid detergent fiber (ADF), neutral detergent fiber (NDF), and in vitro dry matter disappearance (IVDMD) was performed using near infrared reflectance spectroscopy (NIRS) on both whole plant and stover samples [...]
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