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细根和地上凋落物分解和周转,是建模和预测土壤碳汇需要测量的2个关键生态过程,通过对亚热带典型常绿阔叶林、杉木、马尾松林和毛竹林110个样地内凋落物和细根的生物量和碳储量进行研究,分析了森林细根和地上凋落物的生物量和碳储量以及彼此之间的差异和相互关系。结果表明:杉木林凋落物生物量(4.415±0.390)t/hm2最大,毛竹林(2.918±0.310)t/hm2最小,且与其他森林差异显著;凋落物碳储量毛竹林(1.176±0.260)t/hm2最小,与其他森林碳储量差异显著,最大的是常绿阔叶林(1.725±0.16)t/hm2;4种不同森林类型细根生物量和碳储量差异显著,同一森林类型不同土层活和死细根生物量差异显著;从活/死根值中可知,常绿阔叶林细根周转要比针叶林(杉木、马尾松)快。
Fine roots and litter decomposition and turnover are the two key ecological processes that need to be measured in modeling and predicting soil carbon sinks. Through the analysis of the litterfalls in 110 plots of typical subtropical evergreen broad-leaved forest, Chinese fir, Pinus massoniana and Moso bamboo forest And the biomass and carbon storage of fine roots, the biomass and carbon storage of fine roots and litter in forest and the differences and correlations between them were analyzed. The results showed that the litterfall biomass of Chinese fir was the highest (4.415 ± 0.390) t / hm2, and the lowest was that of Phyllostachys pubescens (2.918 ± 0.310) t / hm2. / hm2 is the smallest, which is significantly different from other forest carbon stocks. The largest is the evergreen broad-leaved forest (1.725 ± 0.16) t / hm2. There are significant differences in fine root biomass and carbon storage among the four forest types. The difference of fine root biomass between live and dead was significant. From the live / dead root values, the fine root turnover of evergreen broad-leaved forest was faster than that of coniferous forest (Cunninghamia lanceolata and Pinus massoniana).