Study on the Changes ofNutrients andM ineral Elementsin Tree Peony Before and After Flowering

The contents o f nutrien ts andm inera l elem en ts in tree peony w ere ana lyzed by SA S so ftw a re. The results show ed tha t the changes of nu trien ts and m inera l elem ents, such as total sacchar ide, po lysaccharide,bisaccharide, N, P, C a, w ere sign if icant before and a fter flow er ing. It delicates that the b loom ing is a energyem itting stage. M ost of the nutrients, fo r ex ample po ly sacchar ide, in roo t w ere much h igher than those in 1-year-o ld branches, o the rw ise there w as no sign ificant change in the m inera l e lemen ts betw een roots and branches. It is sa id that the roo ts and the branches of tree peony are them ain organ o f the nutrien ts storage and pa thof nu trients transference respective ly.