The model of interest is a combination of a carbon-balance model of stand growth and an crown-rise (sub)model. The parameters of the model have been estimated for planted stands of loblolly pine (Pinus taeda L.). The rules by which carbon is allocated to the organs and tissues of the model stand are based on pipe-model theory. The rate of production of photosynthate is parameterized in terms of growing degree days and Paimer drought severity Index. Maintenance respiration rates are parameterized in terms of growing degree days. Thus, the model provides a framework to Investigate certain effects of climate on the long-term growth of stands of loblolly pine.
Key words: pipe model, crown rise, photosynthate production.
Correspondence: Harry T. Valentine, U.S.D.A. Forest Service, Louis C. Wyman Forestry Sciences Laboratory, Durham, New Hampshire 03824-0640 U.S.A.