Effects of Soil Water Contents on Nutrient Uptake and Allocation of Baldcypress

One year old seedlings of baldcypress （Taxodium distichum） were grown in pots under greenhouse conditions with varying soil water contents （W1,flooding;W2,waterlogging;W3,75% of field water capacity;W4,50% of field water capacity;W5,25% of field water capacity） to study the effects of soil water contents on nutrient uptake and allocation of baldcypress. The treatment lasted 130 days, and the results are as follows: （1）The total N concentration of root, stem and leaf of baldcypress increased with increasing of soil water contents, and the total P concentration of root, stem and leaf of W3 among five water treatments was the lowest, flooding or drought stress increased the total P concentration, and the total Ca, K, Na, Mg and Fe concentration in root, stem and leaf had different changing tendency; （2） The order of total N, P, Ca, K, Na, Mg and Fe concentration in root, stem and leaf was in the order of leafrootstem; （3） The total accumulation of nutrients in baldcypress decreased with decreasing of soil water contents, and the allocation ratio of root and stem increased with decreasing of soil water contents, while the allocation ratio of leaf decreased significantly with decreasing of soil water contents.