Model Analysis Of Forage Response To Split Applications Of Nitrogen. II. Coupling Of Roots And Tops*

Abstract

The extended logistic model provides a useful tool for describing crop response (dry matter and plant nutrient uptake) to applied nutrients. In the previous article model parameters were evaluated for field data on Pensacola bahiagrass (Paspalum notatum Flügge). The analysis showed no advantage to split applications of applied N on poorly drained Myakka fine sand (sandy, siliceous, hyperthermic Aeric Haplaquod). In this article the analysis is extended to data for the root-stolon component. Root production [dry matter and plant nitrogen (N) uptake] is coupled to the tops (aboveground component). Analysis again showed no advantage to splitting of applied N.

^*Florida Agricultural Experiment Station Journal Series No. R-08815.

Acknowledgments

Notes

^*Florida Agricultural Experiment Station Journal Series No. R-08815.