秃杉引种效果分析

Taiwania flousiana Introduction Effect Analysis

对福建省德化葛坑国有林场引种的20年生、21年生秃杉试验林进行调查分析。结果表明:秃杉平均单株材积,不同立地质量等级之间相差25%～80%,在Ⅱ、Ⅲ类地间无显著差异。秃杉单位蓄积量,海拔550 m与海拔980 m间差异不显著,但与1650 m间存在极显著差异;不同坡向间,秃杉单位蓄积量差异极显著,相差23.4%～71.4%;不同坡位间,秃杉单位蓄积量差异极显著,相差13.2%～75.8%;不同混交方式间差异达显著以上,秃杉与杉木1∶1混交造林的单位蓄积量最大,增幅达13%～31.4%。

20 and 21-year-old Taiwania flousiana experimental forest in Dehua Gekeng State-Owned Forest Farm were investigated . Results showed that the difference between Taiwania flousiana average individual volume reached 25%~80% with different site quality grades ,no significant difference existed between Ⅱ, and Ⅲ type of lands.the difference between Taiwania flousiana unit volumes was not significant at an altitude of 550 m and an altitude of 980m, but there was an extremely significant difference be-tween altitudes of 1650 m and 550 m;Taiwania flousiana unit stocking difference was significant , reached 23.4%~71.4%between different slope directions;In different slope positions ,Taiwania flousiana unit volume difference was significant , reached 13.2%~75.8%;the significant difference existed between different mixed ways , Taiwania flousiana and Cunninghamia lanceolata mixed af-forestation( 1∶1) mixed unit volume was the largest , the increase range reached 13%~31.4%.