Model of Dry Matter and Plant Nitrogen Partitioning between Leaf and Stem for Coastal Bermudagrass. II. Dependence on Growth Interval

Abstract

Part I of this series discussed dependence of partitioning between leaf and stem on harvest interval for Coastal bermudagrass (Cynodon dactylon L. Pers.). The expanded growth model described partitioning of both dry matter and plant nitrogen for seasonal totals. In this article the model is applied to accumulation of stem dry matter with time (growth interval) as the season progresses. A linear phase relation is established between leaf and stem dry matter. Estimates of leaf and stem nitrogen concentrations from Part I are then used to estimate accumulation of plant nitrogen with time. Model simulations describe data from Tifton, GA rather well.

Keywords:

• Model
• Forage
• Partitioning