Paulownia tomentosa Seedling Growth at Differing Levels of pH, Nitrogen, and Phosphorus

Abstract

This study examined the effects of various levels of acidity, nitrogen, and phosphorus on the survival and growth of Paulownia tomentosa seedlings. The seedlings grew within a pH range of 7.0 to 4.0, but little or no growth occurred at pH 3.0. The seedlings grew well with nitrogen at 50 to 200 ppm and phosphorus at 5 ppm, but growth was greatly reduced below 10 ppm nitrogen. Higher levels of phosphorus need to be investigated.