摘要
本文利用兴安落叶松树干解析资料探讨天然异龄林地位质量评估方法.试图从优势木树高与胸径的相关关系入手,以优势木在标准胸径时所达到的树高作为评估地位质量的指标.利用Richards函数拟合树高一胸径地位指数曲线及树高一年龄地位指数的导向曲线,并将两者进行了比较.结果表明树高一胸径地位指数曲线更适用于兴安落叶松天然异龄林地位质量的评估.同时,本文还分析了标准胸径的确定和导向曲线的展开方法,讨论了林分密度对潜在的地位生产力评估的影响.
A method for estimating site quality of uneven-aged natural Larix gmelini stands is studied on the basis of stem analysis data.Depending on the relationship between height (H) and diameter (D) of dominant trees,it takes the height of the dominant achieved at base diameter as the index of site quality estimation.Richards function is used to fit H-D and H-A curves.The methods of H-D index and the site index are compared.The results show that H-D site index curve is more suitable than N.-A site index curve in site quality of uneven-aged natural Larix gmelini stands.In this paper,the methods of determining base diameter and developing the guide curves are examined,the influence of stand density on potential productivity assessment is discussed.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1993年第2期46-53,共8页
Journal of Beijing Forestry University
基金
国家自然科学基金
关键词
落叶松
地位质量
天然林
异龄
uneven-aged natural Larix gmelini stand,site quality,H-D site index
