摘要
用 Korf方程作为优势木高生长曲线模型 ,分别建立同形和多态形地位指数曲线并进行检验比较 .结果表明 :用标准差调整法、比例法、差分方程法建立的同形曲线 ,其估计精度有限 ,较难满足要求 .用 3种不同的方法建立的多态形曲线 ,其估计精度均十分理想 .用单纯形法进一步优化 ,3种方法的优化结果均很显著 .通过比较 ,把优化后精度最高的多态形曲线 H=SI×exp[( 4 .81 46+ 2 4 .5 0 92÷ SI)× ( 2 0 -c- t-c) ],c=0 .5 0 4 6e-0 .0 2 3 7SI选为地位指数曲线模型 。
Using the Korf equation as the curve model of the dominant tree's height growth,this paper established the single shaped and multi shaped curve models of the site index,then tested and compared them The results showed that:the single shaped curves which established by standard difference adjusted method,proportion method,and dispatch equation method have limited evaluating precision and are relatively difficult to content the demands But those multi shaped curves which established by the three same methods have perfect evaluating precision The improving effect are very remarkable by using the simplex method to optimize the parameter of multi shaped curves After the comparison,the author selected out the highest precise multi shaped curve H=SI×exp〔(4 814 6+24 509 2÷SI)×(20 -c -t -c )〕,c=0 504 6e -0 023 7SI as the curve model of site index,then made the site index table
出处
《福建林学院学报》
CSCD
北大核心
2002年第2期164-168,共5页
Journal of Fujian College of Forestry
基金
福建省科学技术委员会科学基金资助项目 (K2 0 0 0 41)
