Publication Date
1997
Description
Long-term effects of elevated carbon dioxide (CO2) and elevated temperature on growth processes of bahiagrass (Paspalum notatum Flugge) and rhizoma peanut (Arachis glabrata Benth.) were evaluated. Forages were established and grown in 27-m long temperature-gradient greenhouses constructed over a natural field soil. Treatments were two CO2 levels, 350 or 700 vpm CO2, and four temperature sectors (0, 1.5, 3.0, and 4.5 °C above ambient). Shoot emergence, ground cover, leaf and canopy assimilation, rate of leaf appearance, and dry matter accumulation were measured. Increasing temperature accelerated plant establishment and increased early plant dry matter accumulation, leaf area, and leaf appearance rate. Doubling CO2 increased biomass accumulation by 14 and 52%, and increased leaf photosynthesis by 18 and 41%, respectively for bahiagrass and rhizoma peanut. Elevated CO2 increased single-cut establishment-year herbage yield of bahiagrass from 321 to 376 g m-2 and rhizoma peanut from 318 to 384 g m-2, increases of 17 and 21%, respectively. Growth and assimilation of both species showed no negative effects of elevated temperature.
Citation
Boote, K J. and Fritschi, F B., "Elevated CO2 and Temperature Effects on Paspalum and Arachis Forages" (2024). IGC Proceedings (1997-2023). 8.
https://uknowledge.uky.edu/igc/1997/session9/8
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Elevated CO2 and Temperature Effects on Paspalum and Arachis Forages
Long-term effects of elevated carbon dioxide (CO2) and elevated temperature on growth processes of bahiagrass (Paspalum notatum Flugge) and rhizoma peanut (Arachis glabrata Benth.) were evaluated. Forages were established and grown in 27-m long temperature-gradient greenhouses constructed over a natural field soil. Treatments were two CO2 levels, 350 or 700 vpm CO2, and four temperature sectors (0, 1.5, 3.0, and 4.5 °C above ambient). Shoot emergence, ground cover, leaf and canopy assimilation, rate of leaf appearance, and dry matter accumulation were measured. Increasing temperature accelerated plant establishment and increased early plant dry matter accumulation, leaf area, and leaf appearance rate. Doubling CO2 increased biomass accumulation by 14 and 52%, and increased leaf photosynthesis by 18 and 41%, respectively for bahiagrass and rhizoma peanut. Elevated CO2 increased single-cut establishment-year herbage yield of bahiagrass from 321 to 376 g m-2 and rhizoma peanut from 318 to 384 g m-2, increases of 17 and 21%, respectively. Growth and assimilation of both species showed no negative effects of elevated temperature.
