| This paper measured 10 kinds of nutrion elements including N, P, K, Ca, Mg, S, Fe, Cu, Zn, Mn from 15 families of Acacia crassicarpa, the results showed that there was a significant difference in the nutrient requirement of different families, and the most significant difference appeared among the four elements of N, K, Ca, S; The nutrient requirement of arder the 15 families was 12>21>35>18>1>16>11>13>15>9>22>10>4>8>2; The total nutrient requirement order in organs was stem> leaf> root. In the end, we gained the proportion of nutrient requirement which was N：K：Ca：S：Fe：
P：Mg：Zn：Mn：Cu=1469：991：474：239：146：121：94：1：7：7.2. |
