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Carbon Dioxide and Temperature Effects on Forage Dry Matter Production

^a Agronomy Dep., Univ. of Florida, Gainesville, FL 32611-0300
^b USDA-ARS, P.O. Box 110965, Gainesville, FL 32611-0965
^c Statistics Dep., P.O. Box 110339, Gainesville, FL 32611-0339

View larger version (24K): [in a new window]   Fig. 1. Example of treatment layout in a temperature-gradient greenhouse (not to scale). Unidirectional arrows indicate the direction of air flow. One greenhouse represents one replicate of one CO2 treatment

View larger version (22K): [in a new window]   Fig. 2. Monthly averages of average daily air temperature in Greenhouse 1 for baseline (B) through B+4.5°C temperature treatments during 1996

View larger version (15K): [in a new window]   Fig. 3. Monthly averages of average daily soil temperature in Greenhouse 1 for baseline (B) and B+4.5°C temperature treatments during 1996

View larger version (31K): [in a new window]   Fig. 4. Daily mean, minimum, and maximum air temperature for baseline temperature in Greenhouse 1 during 1996. These values were extracted from measurements over each 24-h period at 20-min intervals

View larger version (17K): [in a new window]   Fig. 5. Photosynthetically active radiation (PAR) for the 1996–1998 seasons. Values for each month are daily averages

View larger version (43K): [in a new window]   Fig. 6. Percentage of total-season DM harvested of bahiagrass (BG) and rhizoma peanut (RP) by harvest. There were three harvests (h) in 1996 and four in 1997 and 1998. L = linear, Q = quadratic, and C = cubic effect of harvest number. **, P 0.01; *, P 0.05