利用标准差调整法，分别导出水杉和杨树12-24 m共7条地位指数曲线，

Using the standard deviation Adjustment Act, fir and poplar were exported a total of 12-24 m 7 Index Curve, fir and poplar plantations in subtropical regions north of the preparation level position index table, by placement test method for the preparation of the index level status table index level status tested, results show that the preparation has good accuracy

Using the standard differential adjustment method, the seven status index curves of spruce and poplar 12-24 m were derived, the status index table of sequoia and poplar artificial forest in the north subtropical region was compiled, and the status-level index table compiled was tested by the drop-point test method.

Seven site index curves of Metasequoia glyptostroboides and poplars were derived by using the standard deviation adjustment method. The site index tables of Metasequoia glyptostroboides and poplars plantations in the north subtropical region were compiled. The results showed that the site index tables had good accuracy<br>