Study on the Introduction and Early Adaptability of Adaptable Afforesta tionTree Provenances in Hot and Ar id Va lley, Jinsha jiang River

The growth performances of 17 p rovenances of 3 Acacia species, 2 provenances of Casuarina species, and2 provenances of Eucalyptus specieswere analyzed. The results showed that there are very significant differences among p rovenances in tree height, crown diameter, ground diameter and reserving rate. All the indicators excep t reserving rate were remarkably different among blocks. For 17 Acacia p rovenances, the difference in tree height,crown diameter and ground diameter among p rovenances and blockswere very significant, but no difference existedbetween the 2 Casuarina p rovenances in tree growth. By 18 months’analysis and Ducan test, the 21 provenanceswere divided into 3 group s, in which 2 Casuarina p rovenances, 2 Eucalyptus p rovenances and 2 Acacia p rovenanceshad the best growth performance and could be selected as the op timal p rovenances to p lant in hot and arid valley.