降香黄檀在四川的引种表现及早期生长评价

Introduction Performance and Early Growth Evaluation of Dalbergia odorifera in Sichuan

[目的]观测四川乐至等地降香黄檀的物候期、抗寒性及生长情况,明确引种表现,并进行初步生长评价。[方法 ]采用固定样方,确定标准株,标准株上随机确定有代表性的观测枝,测定相关指标。[结果 ]引种地降香黄檀均能够开花结实,引种地物候期比原产地晚20~30 d;引种地冬季均有不同程度冻害发生,东兴区和乐至县的冻害发生率较高,宜宾和仁寿县冻害发生率较低,乐至县冻害指数最高,达到83.06%;引种地降香黄檀年地径净生长量达1.91 cm,树高净生长量0.84 m,冠幅净增加值0.80m。[结论]降香黄檀在引种地能够正常开花结实,有较强的适应性;易发生极端低温天气的地区不宜引种降香黄檀;引种条件下,生长速度较快,但干形偏差,不利于成材。

[Objective]The phenological period,cold resistance and growth of Dalbergia odorifera of Sichuan province were observed,and the performance of introduced species was defined,and the preliminary growth evaluation was carried out.[Method]Standard plants were determined by using the fixed sample plot and the diagonal line of the test plot as the reference line.Representative observation branches were randomly determined on the standard plants and then related indexes were measured.[Result]The four introduced fields were able to flower and bear fruit,and the phenological period of the introduced fields was 20-30 d later than that of the origin.In winter,different degrees of freezing damage occurred in the four introduced fields.The incidence of freezing damage was higher in Dongxing district and Lezhi county,and lower in Yibin and Renshou county.The freezing damage index was the highest in Lezhi county,reaching 83.06%.The annual net growth of ground diameter was 1.91 cm,the net growth of tree height was 0.84 m,and the net increase of crown width was 0.80 m.[Conclusion]D.odorifer could flower and bear fruit normally and had strong ecological adaptability in the introduced land.Areas prone to extreme low temperature weather should not be introduced.Under the introduction condition,the growth rate was faster,but the dry shape deviation was not conducive to wood formation.