【摘要】 人工林内樟子松天然更新数量较多,分布状态一般较好,但年龄结构不合理,长势不良。林外天然更新的植株数量、分布状况和生长势很好。影响林內天然更新的主导因子是林内总体光照条件,这主要体现在郁闭度大小及更新苗在林分中的位置上,也受间伐与否及林龄和密度大小影响。影响林外天然更新的主导因子是风向及离林缘距离,灌丛有无及土壤裸露程度的影响也较大。在离林缘顺风侧50m以内和迎风侧10m以内、无灌丛、土壤裸露度大的情况下,林外裸地天然更新的植株数量、分布状态及生长情况都能满足营林要求。此外,对天然更新在人工林培养中的应用范围和应用方式做了讨论。更多还原

【Abstract】 Inside plantation of the mongolian scots pine (Pinus Sylvestris var. mongolica), there are many regeneration secdlings, which distribution is rational, but the age structure is irrational and the growth is bad. Outside the plantation, the quantity of regeneration seedlings are very abundant, and its distribution and growth are very well. The key influncial factor on natural regeneration inside plantation is general inside-light condition, which is reflected in the crown density, the place inside plantation, thinning or not, the stand age and stand density. The influencial factors on natural regeneration outside plantation are the direction of wind, the distance away from the edge of stand, scrub cxisting or not and exposure of soil. The applying scope and mcthod of the natural regeneration in silviculture are also discussed.更多还原