杉木对不同岩性土体的生长效应研究

Studies on the Growth Effects of Cunninghamia lanceolataon Various Lithological Soil Bodies

用实验生态学方法 ,在不同岩性土体上进行了杉木栽植的研究 ,10a试验结果表明 :杉木的高、径生长以及生物量在不同岩性所发育的土壤上的差异是很显著的。其中以玄武岩与石英砂岩发育的土体上的杉木生长最好 ,依次为长石石英砂岩与变余砂岩 ,而以煤系砂页岩和第四纪红色粘土上的杉木生长最差。不同岩性土体上杉木的生物量与其树高、胸径生长相关 ,反映在杉木生长好的岩性土体上的杉木生物量为高 ,但随着杉木的生长势降低 ,其地下部分的生物量占全株总生物量的比例增大。

The 10 year experiment results show that the differences of Cunninghamia lanceolata height and diameter growth as well as biomass on the soils developed by various lithologies are significant.The growth of C.lanceolata on the soils developed by basalt and quartzy sandstone is the best,feldspar quartzy sandstone and palimpsest the second and third,whereas coal measure arenaceous shale and Quaternary period red clay the worst.The biomass of C.lanceolata on various lithological soil bodies correlates with C.lanceolata height and dbh growth,which is reflected by the following truth:the biomass of C.lanceolata on the lithological soils it grows well with is high,but the proportion of its under ground portion biomass to whole tree total biomass increases with the decrease of its growth vigor.The study provides the basis for attaching importance to the lithological factors in southern mountain area C.lanceolata site classification.