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本文根据1960年10月在东北林学院凉水实驗林場的紅松林內所进行的不同寬度伐区皆伐作业主伐試点的迹地上所作的天然更新調查材料,闡明了迹地植物条件的变化,詳細分析了迹地天然更新的效程及其成敗原因,并得出下列几点結論:紅松林皆伐迹地的天然更新一般需要經过闊叶树(主要是楊、樺)的更替阶段,即伐后10—15年楊、樺郁閉成林时,才可能有更多的紅松更新。皆伐迹地通常能及时为小粒种子楊、樺所更替,但多分布不均,不少土地变为极密草丛和部分平湿地沼泽化的加强。迹地上的前更幼树能于采伐后迅速提高生长量,因此在森林采伐时应当特別注意保留幼苗幼树。皆伐迹地的人工更新是加快更新速度的积极措施,但更新期不应迟于采伐当年或次年,否則四、五年后的迹地为杂草、灌丛所布滿,将会大大增加整地、撫育所需的劳力和經費。
Based on the natural regeneration survey data on the sites of the main cutting trial of clear cutting at different widths in the cold pine forest farm of Dongshulin Forestry College in October 1960, the changes of the plant conditions in the trail were clarified and analyzed in detail It is concluded that the natural regeneration of the clear cuttings of Pinus koraiensis generally needs to be replaced by the replacement of broad-leaved trees (mainly poplar and birch), ie, 10 - 15 years Yang, Birch canopy closed forest, there may be more red pine regeneration. Clear-cut land can usually be timely for the small seed poplar, birch replacement, but uneven distribution, many of the land into extremely dense grass and part of the wetlands to strengthen the swamp. Pre-young shoots on the trail can rapidly grow after harvesting, so special attention should be given to preserving the seedling saplings during logging. The artificial regeneration of clear cuttings is an active measure to speed up the update, but the update period should not be later than the current year or next year of harvesting. Otherwise, the weeds and scrubs will be covered after four or five years, which will greatly increase soil preparation , Nurturing the labor and funds needed.