岩性对杉木生长的影响

Effects of Lithological Characters on the Growth of Cunninghamia lanceolatand

[目的]揭示岩性土壤与杉木生长的关系,为系统培育杉木速生丰产林奠定基础。[方法]采用实验生态学的方法,通过方差分析,对6类不同岩性发育的土体上11年生杉木生长和生物量进行研究。[结果]6类不同岩性发育的土体对杉木的高、径生长及生物量效应影响不同,其中,长石石英砂岩平均树高为523.270 cm,平均胸径为4.720 cm,平均单株生物量为5.059 kg;玄武岩平均树高为511.570 cm,平均胸径为4.650 cm,平均单株生物量为4.848 kg,生长良好,以下依次是石英砂岩、变余砂岩、第四纪红色黏土和煤系硅质砂页岩,且后2类岩性差异较小。[结论]长石石英砂岩和玄武岩对杉木生长最有利。

[Objective] The aim was to reveal relationship between lithological character soil and productivity of Cunninghamia lanceolata and lay a foundation for systemic management of C.lanceolata fast-growing and high yield plantation.[Method] By using experimental ecology method and variance analysis,the biomass and growth of planting eleven years′ C.lanceolata on the soils with six different lithological characters were studied.[Result] The effects of soils with six different lithological characters on the height,diameter growth and biomass of C.lanceolata were different,in which the growth order of C.lanceolata was： Feldspathic quartzy sandstone（average height 523.270 cm,average diameter 4.720 cm,average individual biomass 5.059 kg） Basalt（average height 511.570 cm,average diameter 4.650 cm,average individual biomass 4.848 kg）Quartzy sandstoneBlastopsammiteThe Quarternary Period red clayCoal-series siliceous sand-shale,and the difference was smaller between the last two lithological characters.[Conclusion] Feldspathic quartzy sandstone and Basalt are beneficial to C.lanceolata.