岩性对杉木生长的影响

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。

Effects of Lithological Characters on the Growth of Cunninghamia lanceolatand

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 sandstone＞Blastopsammite＞The Quarternary Period red clay＞Coal-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.