不间伐状态下杉木人工林材积年收益的初步研究

Preliminary Study on the Annual Profit of Timber Volume of Cunninghamia lanceolata Forest under Different Thinning Situations

通过研究未间伐状态下不同初植密度的杉木人工林分材积年均收益与林分年龄的关系,建立杉木人工林数量成熟数学模型。结果表明:杉木林分年均材积收益与林分年龄之间存在显著的二次抛物线关系;合理密植可以使林分数量成熟年龄提前,缩短培育周期。

In this paper,Cunninghamia lanceolata plantation quantitative maturity mathematical models were established by studying the relationship between the age and annual average profit of standing forest of different afforestation-density without thinning-cut.The result showed：there was a marked relationship of quadratic parabola between the age and annual average profit of standing forest of Chinese fir;the quantitative matured age could be moved up and the culture cycle could be shortened by rational planting density.