Abstract

Three typical substropical evergreen broad-leaved forests (Castanopsis eyrei, Schima superba and Cyclobalanopsis glauca) in Wuyi Mountain National Nature Reserve of Jiangxi Province were selected to investigate its carbon sequestration capacity. The biomass and soil bulk density of sample investigation were get by setting sample investigation, field quadrat sampling, indoor sample making, experimental analysis testing, data statistics and analysis. The organic carbon content of vegetation layer (arbor layer, shrub layer and herbaceous layer, litter layer) and soil layer (0-10cm, 10-20cm, 20-30cm, 30-50cm and 50-100cm) were also get. The carbon density and carbon storage of subtropical evergreen broad-leaved forests vegetation and soil were estimated which including Castanopsis eyrei, Schima superba and Cyclobalanopsis glauca. The investigation results had shown that: The average organic carbon content of each vegetation layer in the investigation plot (400 m2) of Wuyi Mountain National Nature Reserve was arbor layer (54.07%)> shrub layer (52.8%)> herbaceous layer (47.5%), in which the average organic carbon content of the three subtropical evergreen broad-leaved forests in the arbor layer was close 52.97% to 54.87% and the total average content was 54.07%. The average carbon density of the forest vegetation layer was 178.3587t/hm2, the average carbon density of the vegetation layer was arbor layer (176.0273t/hm2)> shrub layer (1.3043t/hm2)> litter layer (0.8144t/hm2)> herbaceous layer (0.2127t/hm2); the average carbon density of each forest species was Castanopsis eyrei (213.5141t/hm2)> Schima superba (168.9069t/hm2)> Cyclobalanopsis glauca (152.6551t/hm2). Investigation sample of subtropical evergreen broad-leaved forest (400 m) in Wuyi Mountain National Nature Reserve, Jiangxi Province2 The average soil bulk density of each soil layer cm 0-100 g/cm was 0.868-1.816 g/cm3 both soil organic carbon content and soil carbon density decreased with the increase of soil depth. The average organic carbon content of each soil layer was between 3.75% and 12.48%, and the average soil carbon density was between 62.85t/hm2 and 146.14t/hm2. The average total carbon density of the soil in the investigated sample plots was 754.77t/hm2, of which the average soil carbon density in investigation sample plots in Castanopsis eyrei, Schima superba and Cyclobalanopsis glauca was 911.49t/hm2, 762.56t/hm2 and 543.22t/hm2 respectively. The average carbon storage of the investigation sample plot (400m2) in Jiangxi Wuyi Mountain National Nature Reserve were Castanopsis eyrei forest (45.0002t) >Cyclobalanopsis glauca forest (36.6087t) > Schima superba forest (28.4850t), the average soil carbon storage(30.1908t) was 4.23 times the average carbon storage(7.1314t).

Highlights

  • Forest ecosystem is an important part of global ecosystem and plays an important role in regulating carbon cycle in the world

  • As can be seen from table 3, the average organic carbon content of the herbaceous layer of three subtropical evergreen broad-leaved forest species of Castanopsis eyrie, Schima superba and Cyclobalanopsis glaucain in the sample plot (400 m2) had some differences, ranging from 42.24% to 51.58%, and the overall average content was 47.50%

  • The carbon storage order of the three subtropical evergreen broad-leaved forests of Castanopsis eyrie, Schima superba and Cyclobalanopsis glaucain in the investigation plots in Wuyi Mountain National Nature Reserve in Jiangxi Province was Castanopsis eyrie (8.5406t) > Schima superba (6.7563t) > Cyclobalanopsis glauca(6.1062t)

Read more

Summary

Introduction

Forest ecosystem is an important part of global ecosystem and plays an important role in regulating carbon cycle in the world. Jiangxi Province locates in the subtropical region and its forest coverage rate is the second in China. The subtropical evergreen broad-leaved forest is the zonal vegetation of Wuyi Mountain National Nature Reserve in Jiangxi Province. The research on carbon storage and carbon density of vegetation and soil in Wuyi Mountain National Nature Reserve in Jiangxi is very rare. Taking Wuyi Mountain National Nature Reserve of Jiangxi Province as the research area, the carbon sequestration capacity of typical subtropical evergreen broad-leaved forest was studied, which had certain reference value for evaluating the carbon storage of Jiangxi province.

Investigation regional profiles
Investigation methods
Analysis methods
Soil bulk density
Calculation of vegetation carbon storage and carbon density
Organic carbon content in Vegetation layer
Vegetation carbon storage
Vegetation carbon density
Soil organic carbon content
Soil carbon density
Soil carbon storage
Findings
Conclusion and discussion
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call