EFFECTS OF STORAGE HISTORY AND HYBRID ON CARBON-DIOXIDE PRODUCTION BYREWETTED SHELLED CORN

Carbon dioxide evolution tests were conducted with samples of fresh co rn and samples of corn previously stored in bins for either four month s or five years. Storage history affected the carbon dioxide evolution . Statistically significant differences in carbon dioxide evolution ra te between hybrids P3377 and FRB73XMo17 at harvest were still signific ant after low-moisture (13.2-13.4%) storage for 56 months. Analysis of covariance was used to analyze the initial respiration rates (first 7 2 hr) of the test results. This statistical evaluation revealed differ ences in carbon dioxide evolution in one-fourth the time required by p revious methods, such as time to reach 0.5% dry matter loss. The initi al slope of the respiration rate curves varied with length of previous bin storage and, therefore, gave an indication of potential for futur e spoilage.