摘要
用哑变量法求算立地指数曲线族的研究＊李希菲洪玲霞关键词立地指数曲线哑变量方法导向曲线法立地质量是表示生长在某一立地上既定树种或林分类型林木的生产潜力［１］。立地质量不同，林木的经营措施也不同。描述立地质量的方法很多，现在多采用地位指数，即以造林年数和...
Using dummy variables method to calculate the family of the site index curves is introduced in this paper.The method is able to settle the problem that the slop of guide curve is too dependent on site age distribution of sampling plots when guide curve method is employed.The variations of jackknifes slops which are got from dummy variables method and guide curve method are compared.The result shows that the standard deviation of guide curve method is as three times as that of dummy variables method.The result proves that dummy variables method is better than guide curve method.
出处
《林业科学研究》
CSCD
北大核心
1997年第2期215-219,共5页
Forest Research
基金
国家自然科学基金
