tailieunhanh - Báo cáo khoa học: " Evaluation of the effects of climatic and nonclimatic factors on the radial growth of Yezo spruce (Picea jezoensis Carr) by dendrochronological methods"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: " Evaluation of the effects of climatic and nonclimatic factors on the radial growth of Yezo spruce (Picea jezoensis Carr) by dendrochronological methods. | Ann. Sci. For. 55 1998 277-286 Inra Elsevier Paris 277 Original article Evaluation of the effects of climatic and nonclimatic factors on the radial growth of Yezo spruce Picea jezoensis Carr by dendrochronological methods Osamu Kobayashi3 Ryo Funadab Koh Yasueb Jun Ohtanib aKomeno-no Forest Research Center Experiment Forest of Ehime University Ohino-machi 145-2 Matsuyama Ehime 791-01 Japan bLaboratory of Wood Biology Department of Forest Science Faculty of Agriculture Hokkaido University Sapporo 060 Japan Received 23 May 1997 accepted 5 November 1997 Abstract - The responses to climatic and nonclimatic factors of Yezo spruce Picea jezoensis Carr trees growing in a natural forest in Tomakomai Hokkaido were analyzed by dendrochronolog-ical methods. The effects of climatic factors were examined by response function analysis. More than 70 of the variance of ring-width and maximum-density indices was explained by climatic data from 1924 to 1965. The effect of nonclimatic factors on radial growth from 1966 to 1990 was analyzed by comparing actual indices with the estimated indices of ring width and maximum density calculated from the climatic data. Actual ring-width indices were lower than the estimated indices every year from 1969 to 1977. Actual maximum-density indices were lower than the estimated indices every year from 1971 to 1974. These results indicate that some noncli-matic factors might have affected both ring width and maximum density in the 1970s. Inra Elsevier Paris. Picea jezoensis Carr ring width maximum density X-ray densitometry response function analysis Resume - Evaluation des effets des facteurs climatiques et non climatiques sur la crois-sance radiale de I epinettes de yezo Picea jezoensis Carr par les methodes dendrochro-nologiques. Les réponses aux facteurs climatiques et non climatiques de 1 épinette de yezo Picea jezoensis Carr ont été étudiées dans des forets naturelies du Tomakomai dans I lle d Hokkaido par les methodes dendrochronologiques. .

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