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徂徕山林场徂徕营林区油松面积9,786亩,占有林地面积(18,967亩) 的51.6%;油松蓄积量为36,893米~3,占林木总蓄积量(64,847米~3)的56.9%。绝大部分油松林是1956-1958年营造的,现已进入中龄林,胸径与材积生长已进入了速生期。确定合理的密度改善林分结构,促进林木充分发育,加速林木生长,是这一时期的主要营林措施。因此,我们结合1984年森林经理调查,通过对油松林分优势木和平均木的调查,利用胸径与冠幅呈正相关的规律,经回归分析,求出与胸径相对应的树冠面积作为林木生长的营养面积,试图确定出适于油松林生长的合理密度。
The area of Pinus tabulaeformis forest in Dalai Mountain Forest Farm is 9,786 mu, accounting for 51.6% of the total forest land area (18,967 mu); the volume of Pinus tabulaeformis is 36,893m ~ 3, accounting for 56.9% of the total forest volume (64,847m ~ 3) . Most of the Pinus tabulaeformis forests were built in 1956-1958 and have now entered the middle-aged forest. The DBH and volume growth have entered a period of rapid growth. Determine a reasonable density to improve the stand structure, promote the full development of trees, and accelerate the growth of trees is the main forest management measures during this period. Therefore, we combined with the survey of forest managers in 1984, through the investigation of the dominant wood and average wood of Pinus tabulaeformis, using the law of the correlation between the DBH and the crown, we can get the crown area corresponding to the DBH as the tree growth by regression analysis Nutrient area, trying to determine a reasonable density for Pinus tabulaeformis growth.