| Although it is quite effective to use traditional selection breeding to tree species,long time is still needed because of long growing period of trees. At present,early test in tree breeding is often used in order to shorten breeding term and provide the excellent materials for forest production as soon as possible. In this paper,some physiological characteristics,such as hormone content,nitrate reducetase and soluble protein concentration,are studied to detect whether or not these characteristics function well as early selection indexes in the breeding ofPicea koreiansis.In this study,the materials come from the provenance trial of 18-19 years old in Maoershan Forestry Experiment Station of Northeast Forestry University. There is significant difference among the height and diameter characteristics among the provenance,in which Wuyiling provenance is the best in growth and Huanan and Gaofeng provenances are the worst.It has significant difference between the content of LAA,GA among the provenances in growing period. The IAA content in the provenance is higher than GA and ABA. The higher the IAA content in the plant is,the faster the provenance grows,and vice versa. ABA content in the provenance is very low. There is no clear correlation between hormone content and growth characteristics among the provenance in dormancy period,but the ABA in the provenance is higher than IAA and GA.It also has great change in the concentration of Nitrate Reductase among the provenance no matter when is in April of the dormancy period or in June of the growing period,with the same change trend for the same provenance. Almost the same result is obtained for the concentration of soluble protein among the provenance,but there has a little difference in the concentration of soluble protein in the same provenance between 2000 and 2001. Besides,it shows significant correlation (r>0.82) among the growth characteristics and the concentration of Nitrate Reductase,as well as soluble protein among the provenances.
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