【摘要】 <正>杉木是我国特有树种,也是最有价值的用材树种之一。它已经长期地、广泛地被我国劳动人民大量地培养着,今後的发展前途更是广阔。 杉木生长迅速,干形挺拔,木理通直均匀,而且造林容易,对於危害的抵抗力也更多还原

【Abstract】 1. Cunninghamia lanceolata (Lamb.) Hook, is endemic to China, being one of the most important timber trees. It is extensively planted in hilly or moun-tainous areas of Central, East, South China and in the eastern part of the South west Its northern limit follows the southern slopes of the Tsingling Ranges (along the 880 m. contour); whereas its southern limit reaches the northern part of the Leichow Peninsula, Kwangtung Province. In the west, it appears among the river gorges of the Tatu, the Arming and the Yalung Rivers, bordering the Tibetan-Sikang Plateau. On the east, it extends off the coast as far as the mountains of Taiwan.2. The range of Cunninghamia lanceolata coincides approximately with that of evergreen broad-leaved trees in South China. Nevertheless, it is not common that it, being not tolerant, is mixed with the evergreen hardwoods. On the other hand, Cunninghamia lanceolata stands are frequently found side by side with the evergreen hardwood stands.3. Generally, Cunninghamia lanceolata does not grow well on exposed ridges or the southern or western slopes, where the scorching summer sun dries the air and the soils. Nor does it grow safe on wind swept sites, as it is a shallow-rooted tree.4. Wherever the annual precipitation exceeds 1,000 mm. without prolonged dry season and the mean January temperature is above 2癈., Cunninghamia lanceolata may be raised successfully, if the soils are not badly eroded. If the January temperature is above 5癈., other conditions being the same, this tree grows at a high rate on favourable sites. An annual yield of 500 cubic metres per hectare or higher, may be obtained with a 30-year rotation. It may be concluded that large-scale plantations are justified.更多还原