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四川盆地丘陵及盆周低山区杉木实生林受气候等环境条件的影响,速生期早而短,若立地条件差则很多林木因早熟而达不到培育目标。本研究在调查杉木主要分布区林分生长状况基础上,通过树干解析、生长过程对比分析,弄清了该地区杉木林分速生期持续的年限,并提出了以间作、合理施肥、合理密植为提高产量的主要措施。试验证明,这些措施具有明显的效果,既改良了林地土壤的理化性质、提高了土壤肥力,又延长了林分的速生期,提高林分蓄积并改善了木材的规格质量,其经济效益和社会效益都十分明显。
Affected by climate and other environmental conditions in the hilly and basin-periphery low mountainous areas of Sichuan Basin, the fast-growing period is short and short. If the site conditions are poor, many trees fail to achieve their breeding goals due to precocious puberty. Based on the investigation of the stand growth in the main distribution area of Chinese fir, this study analyzed the tree trunk analysis and growth process comparative analysis, and clarified the duration of the fast-growing period of Chinese fir plantation in this area. The intercropping, rational fertilization, The main measure to increase output. Tests show that these measures have obvious effects, not only improving the physical and chemical properties of forest soil, increasing soil fertility, but also extend the fast-growing period, improve stand volume and improve the quality of wood specifications, its economic efficiency and social Benefits are very clear.