Differences of schima Superba Provanances in Seedling Dry Matter Accumulation and Allocation

The provenance trails including 28 seed sources of Schima superba was used to illustrate the differences among provenances in seedling dry matter accumulation and allocation.The results showed that there existed significant differences among and within provenance zones in the dry matter accumulation of seedling and its organ (root,stem and leaf),whose differences came mainly from the provenances within provenance zones and secondly from the provenance zones.A classical latitude clinal variation pattern was found for seedling dry matter accumulation of Schima superba.Provenances from the southern zones had higher productivity of dry matter,compared with the northern provenances. No obvious genetic differentiation among provenance zones was detected for the root-shoot ratio (or the allocation of seedling dry matter to roots),and while its variation between provenances within provenance zones was marked. It was guessed that abundant rainfall and less droughty stress in the natural range of Schima superba could be one of main reasons for random variation pattern for the root-shoot ratio.