SIMULATION OF THE CARBON DYNAMICS OF A FLORIDA SLASH PINE PLANTATION

A model of the carbon dynamics of a Florida slash pine (Pinus elliottii) plantation was designed to use as a tool to scale up physiological data to the stand level, and to address questions about the dynamics of the labile carbon pool (starch + sugars) and fertilization responses. The model adequately simulated labile carbon dynamics, stem growth, and root respiration over a 2-year period. Measured labile carbon pool dynamics were consistent with the simulation based on a daily balance between inputs of net canopy assimilation and outputs of respiration and growth. Increased stem growth following fertilization can be simulated as a consequence of increased foliage mass; no other changes in allocation patterns or physiological responses to fertilization were evident.