杉木成熟林林下植物生物量及其取样技术研究

杉木成熟林林下植物种类生物量大小存在明显差异 .在灌木层中 ,丝栗栲、苦竹、乌药、乌饭、三龙爪等 1 0种灌木层植物 (约占总灌木层种类的 37% )占灌木层总生物量的 84.1 % ;在草本层中 ,狗脊和乌毛蕨 2种植物占草本层总生物量的 93.3% ,这说明林下灌木层和草本层植物的生物量主要集中在少数植物种类中 .不同层次的林下植物生物量表现出灌木层 >草本层 >藤本植物 ,其中灌木层的生物量占林下植物总生物量的 77.0 4 % .林下灌木层和藤本植物中大部分植物的地上生物量显著大于地下生物量 ,而大部分草本植物种类的地下生物量大于或接近等于地上生物量 .杉木成熟林下灌木层生物量在水平空间上分布存在明显的波动性 ,1 0个样方(约 40 m2 )可作为林下灌木层生物量测定的最小取样面积

The Study on Biomass of Undergrowth Plant and Its Sampling Technology in Mature Chinese fir Plantation

The biomass of undergrowth plant species exists significant difference Biomass of 10 plant species including Castanopsis fargesii,Pleioblastus amarus, Lindera strychnifolia,Vaccinium bracteatum,Ficus simplicissima(approximately account for 37% of total plant species in shrub layer) account for 84 15% of total biomass in shrub layer Biomass of Woodwardia japonica and Blechnum orientale account for 93 3% of total biomass in herb layer These show that biomass of shrub and herb layers focus on a few undergrowth plant species The biomass in different layers shows shrub layer>herb layer>liana plant,in which biomass of shrub layer accounts for 77 04% of total biomass Aboveground biomass of most plant species in shrub layer and liana plant is more than underground biomass,but underground biomass of most plant species in herb layer is more than or closely equal to aboveground biomass Shrub layer biomass in mature Chinese fir plantation exists significant fluctuation in horizonal space ,The 10 quadrats (about 40 m\+2) can be used as the minimal sampling area for biomass measurement of shrub layer in mature Chinese fir plantation