不同立地条件杉木、马尾松造林经济效益分析

Analysis of Afforestation Economical Benefits of Cunninghamia lanceolata and Pinus massoniana in Different Site Conditions

研究结果表明 ,杉木、马尾松经济指标与地位指数的相关关系都是紧密的 ,显著性F检验都达到极显著水平 ;杉木与马尾松的产值、盈利率、纯收入、期望价等 4项经济指标与地位指数呈正相关 ,说明地位质量愈好的造林地 ,其产值、盈利率、纯收入、期望价也愈大 ,反之则愈小 ,同时其产值、纯收入、经济临界点随地位质量愈好变化愈缓慢 ,愈差变化愈强烈 ;不过 ,当地位指数相同时 。

The research results indicated that the correlation between Cunninghamia lanceolata economic index and site index,and that between Pinus massoniana economic index and site index were both close,the significance F test reached the extremely significant level;the 4 econmic indexes of production values,profitabilities,net incomes,and expected prices of C.lanceolata and P.massoniana assumed the positive correlation with site indexes,which showed that the better the site quality was,the higher the production value,profitability,net income,and expected price were,otherwise they were lower,meanwhile,the changes of production value,net income,and economic critical point were slower with better site quality,and were more violent with worse site quality;but every economic effects of various tree species were different with the same site index.