Abstract:

We used Qiyuexian Chinese jujube trees to study the varying patterns of soluble sugar，
protein，and C，N，P in the fine roots and leaves from different phenological periods（germination stage，
leaf extension early stage，leaf extension middle stage，whole leaf stage，fruit maturation stage，defoliation
stage）. The results showed that：（1）The contents of soluble sugar，protein and organic carbon increased
with increasing root order，whereas the content of total nitrogen and total phosphorus decreased；（2）
Soluble sugar and protein contents in fine roots changed as a“W”curve，first increasing and then
decreasing in the leaves；（3）Organic carbon content in fine roots decreased until the fruit reached a mature
stage and then increased，decreasing initially and then increasing，and decreasing again in the leaves；the
lowest value was observed in the middle of the leaf extension stage；（4）Total nitrogen content in fine roots
first decreased and then increased，decreasing again in the leaves；the lowest value was observed in the whole leaf and defoliation stages；（5）Total phosphorus content initially decreased and then increased，
followed by another decrease in fine roots，which continued in the leaves until the defoliation period and
then increased；（6）The contents of soluble sugar，protein，organic carbon，total nitrogen and total
potassium in fine root had no obvious correlation with leaf，which need be studied deeply.

Key words: jujube, fine root, soluble sugar, soluble protein, mineral elements