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云南松具有较广的生态适应性和天然更新能力强的特点,但其天然更新效果是受各种自然因素所支配。在保证种源的条件下,自然因素是影响天然更新的主导因素。从大量调查材料整理分析看:海拨1300米以下地段更新困难,海拨升高,更新效果越好,过高也会影响更新;湿度过大不利于更新;阳坡、半阳坡的云南松天然更新效果优于阴坡;草本植物盖度以30—40％有利于天然更新;林冠下只见云南松幼苗,而不是幼树,不能更新成林;采伐跡地上保留一定的母树,天然更新良好,跡地清理比未清理的效果要好。同时,本文也对云南松人工林作了研究,根据立地条件和生长情况,对云南松人工林划了五个类型。此外还对云南松的演替规律作了初步探讨,为今后发展云南松林提供参考。
Yunnan pine has a wide range of ecological adaptability and natural regeneration ability, but its natural regeneration effect is dominated by a variety of natural factors. Under the conditions of provenance, natural factors are the dominant factors affecting natural regeneration. Analysis of a large number of materials from the survey: the altitude of 1300 meters below the update of the difficulties, the altitude increase, the update effect is better, too high will also affect the update; humidity is not conducive to update too large; sunny slopes, Natural regeneration effect is better than the shady slope; herbaceous cover with 30-40% is conducive to natural regeneration; under the canopy see only Pinus yunnanensis seedlings, not saplings, can not be renewed into forests; deforestation to retain some of the mother trees, natural regeneration Good, clean track is better than no cleanup. At the same time, this paper also studied the Pinus yunnanensis plantation, according to the site conditions and growth, planted Pinus yunnanensis plantation in five types. In addition, the law of succession of Pinus yunnanensis was also discussed in order to provide reference for the development of Pinus yunnanensis in the future.