苏北低山丘陵区群落次生演替中碳贮量研究

目的]为探明群落演替过程中碳贮量分布格局。方法]对苏北低山丘陵区典型群落进行样地调查,并对其生态系统碳贮量进行研究。结果]土壤碳贮量随群落演替进程逐渐提高,乔木阶段(58.61 t/hm2)灌丛阶段(44.58 t/hm2)草本阶段(20.37 t/hm2);不同森林植被类型碳贮量的差别较大,其中凋落物和植被碳贮量的差异并不大,碳贮量差异较大的原因在于土壤碳贮量差异较大;碳贮量随群落演替进程逐渐增加,栓皮栎群落碳贮量(40.53 t/hm2)最高,白草群落碳贮量(1.24 t/hm2)最低;生态系统碳贮量随演替进程而增加,草本阶段(20.13t/hm2)灌木阶段(52.34 t/hm2)乔木阶段(92.98 t/hm2)。结论]该研究可为苏北地区植被建设提供理论指导。

Study on Carbon-storage during the Communi ty Secondary Succession Processing in Hilly Region of Northern Jiangsu

Objective] The aim was to explore how carbon-storage distributes during the community succession.Method] A sample plot investigation of typical community in hilly area was carried out in northern Jiangsu and the carbon-storage of its ecosystem was studied.Result] The results showed that the soil carbon-storage increases gradually with community succession process,arbor stage(58.61 t/hm2) > shrub stage(44.58 t/hm2) > herb stage(20.37 t/hm2);different types of forest vegetation carbon-storage have larger differences than the rest,the difference of litter and vegetation’s carbon-storage is not very big,the reason of these differences is difference of soil carbon-storage;carbon-storage increases with community succession process gradually,Quercus variabilis community carbon-storage(40.53 t/hm2) contains the maximum,grass community carbon-storage(1.24 t/hm2) get the minimum;the ecosystem carbon-storage increases with succession process,herbaceous stage(20.13 t/hm2) < shrub Stage(52.34 t/hm2) < arbor stage(92.98 t/hm2).Conclusion] The study will provide theoretical guidance for vegetation construction in northern Jiangsu.