Abstract
This paper is to study on the influence of its growth and biomass under saline irrigation and differency of nutrition in sandy soil by making 4 treatments for Populus alba L.(saline irrigation has or not, nutrition has much or few). The tree height, diameter and biomass in non-saline irrigation and much nutrition plots were larger than those in saline irrigation and few nutrition plots in 1999 and 2000. The roots in saline irrigation plots were distributed more shallow in depth of soil and shorter in the width than those in non-saline irrigation plots. It was shown the decrease of the photosynthetic, transpiration efficiency and water potential of leaves in saline irrigation plots. The leaf areas also decreased with increase of ages in saline irrigation plots. The growth of Populus alba L. was mainly influenced by nutrition in first year after planted and by nutrition and saline irrigation in second year.
