摘要 |
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Abstract | Taking test forests of Pinus tabuliformis Carr. from 23 provenances in Dongling Forest Farm of Zunhua City of Hebei Province as research objects, comparison and variation analysis were conducted for annual height growth increment of P. tabuliformis from each provenance at tree ages of 7-15 a, and the correlations between annual height growth increment of P. tabuliformis from each provenance and climatic factors in current and last years were researched by using redundancy analysis method. The results show that the average of annual height growth increment of provenance from Beishan Mountain in Huzhu County of Qinghai Province (P17) is the lowest (15.18 cm), while that of provenance from Heishan Village in Luonan County of Shaanxi Province (P12) is the highest (23.50 cm) among different provenances, and the average of annual height growth increment is the lowest (12.48 cm) at tree age of 15 a and the highest (26.42 cm) at tree age of 12 a among different tree ages. The variance analysis result shows that there is a significant (P<0.05) difference in annual height growth increment among provenances at tree age of 14 a, while there are extremely significant (P<0.01) differences in annual height growth increment among provenances at other tree ages; except for P17 provenance, there are extremely significant differences in annual height growth increment among tree ages of other 22 provenances. The variation analysis result shows that the averages of variation coefficients of annual height growth increment of different provenances are 31.08%-49.72%, and those of different tree ages are 32.39%-45.10%. The redundancy analysis result shows that 5 climatic factors have significant effects on annual height growth increment of P. tabuliformis in total, and the influence from great to small is precipitation from Mar. to May in current year, temperature at 20 cm underground from Mar. to May in current year, precipitation from Jun. to Aug. in last year, precipitation from Sep. to Nov. in last year, and mean relative air humidity from Mar. to May in last year. In which, precipitation from Sep. to Nov. in last year and mean relative air humidity from Mar. to May in last year show positive correlations with annual height growth increment of P. tabuliformis from test provenances; precipitation from Jun. to Aug. in last year and temperature at 20 cm underground from Mar. to May in current year show negative correlations with annual height growth increment of P. tabuliformis from test provenances; precipitation from Mar. to May in current year shows both positive and negative correlations with annual height growth increment of P. tabuliformis from test provenances. Taken together, there are extremely significant differences in annual height growth increment of P. tabuliformis among different provenances and tree ages in general, and height growth of P. tabuliformis in test area is mainly affected by moisture factors especially precipitation. |
关键词 | 油松; 高生长; 种源; 树龄; 气候因子; 冗余分析 |
Key words | Pinus tabuliformis Carr.; height growth; provenance; tree age; climatic factor; redundancy analysis |
作者 | 荆蓉, 彭祚登 |
所在单位 | 北京林业大学林学院 森林培育与保护教育部重点实验室, 北京 100083 |
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下载次数 | 1210 |
基金项目 | 国家“十三五”重点研发计划(2017YFD0600500) |