摘要
为研究不同利用方式对湿地草地土壤有机碳储量的影响,通过不同时段的土壤剖面有机碳含量的测定数据,分析不同利用方式下土壤碳储量的变化。结果表明:苔草地营造杨树林,对土壤有机碳储量的影响是一个骤变过程,可以引起土壤40cm甚至以下土层有机碳的损失;造林8年后,原来储存在土壤中的有机碳损失了33.89t/hm2;每年取走地上产品对土壤有机碳储量的影响是一个逐渐变化的过程,主要影响土壤表层尤其是0～10cm深土壤碳的积累量,与未受人为干扰的苔草地相比,8年内土壤有机碳的积累量只少1.95t/hm2。不论何种人为利用方式都减少了湿地草地土壤有机碳的积累量。
In order to study the effects of different land use/cover change (LUCC) types on soil carbon storage,the changes were analyzed based on the data of soil organic carbon contents at different time.The results showed that:(a) there was a leap decrease on soil orgamic carbon storage in the early stage when sedgelands changed into poplar forest,which mainly lead to the loss of soil organic carbon at or below 40 cm depth;(b) the land lost soil organic carbon at 33.89 t/hm 2 after 8 years of poplars plantation;(c) taking away the aboveground vegetation products every year changed soil organic carbon storage gradually,which mainly affected soil carbon accumulation in the top layer of soil especially at 0-10 cm depth.Compared with sedgeland which had not been disturbed by human,the soil carbon accumulation reduced 1.95 t/hm 2 within 8 years;(d) whatever LUCC types,all reduced soil carbon accumulation in wetland and grassland of Dongting Lake.
出处
《中国农学通报》
CSCD
北大核心
2011年第2期35-39,共5页
Chinese Agricultural Science Bulletin
基金
湖南省科技厅重点项目(2006SK4059)
国家林业局重点项目(2006-11)
关键词
土地利用
湿地
土壤碳储量
洞庭湖
land use/cover change
wetland
soil carbon storage
Dongting Lake
