Forest soil CO_2 fluxes as a function of understory removal and N-fixing species addition

查看全文 作　　者：Haifang [1,2]Li;Shenglei [1]Fu;Hongting [3]Zhao;Hanping [1]Xia

机构地区：[1]Institute of Ecology, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;[2]College of Tourism, Guilin University of Technology, Guilin 541004, China;[3]E&E Applied Research LLC, 3628 Oakwood Drive, Longmont, Colorado 80503, USA

出　　处：《Journal of Environmental Sciences》索引2011年第23卷第6期,共9页

基　　金：supported by the National Natural Science Foundation of China (No. 30630015,30771704) 摘　　要：We report on the effects of forest management practices of understory removal and N-fixing species(Cassia alata) addition on soil CO2 fluxes in an Eucalyptus urophylla plantation(EUp),Acacia crassicarpa plantation(ACp),10-species-mixed plantation(Tp),and 30-species-mixed plantation(THp) using the static chamber method in southern China.Four forest management treatments,including(1) understory removal(UR);(2) C.alata addition(CA);(3) understory removal and replacement with C.alata(UR+CA);and(4) control without any disturbances(CK),were applied in the above four forest plantations with three replications for each treatment.The results showed that soil CO2 fluxes rates remained at a high level during the rainy season(from April to September),followed by a rapid decrease after October reaching a minimum in February.Soil CO2 fluxes were significantly higher(P < 0.01) in EUp(132.6 mg/(m2.hr)) and ACp(139.8 mg/(m2.hr)) than in Tp(94.0 mg/(m2.hr)) and THp(102.9 mg/(m2.hr)).Soil CO2 fluxes in UR and CA were significantly higher(P < 0.01) among the four treatments,with values of 105.7,120.4,133.6 and 112.2 mg/(m2.hr) for UR+CA,UR,CA and CK,respectively.Soil CO2 fluxes were positively correlated with soil temperature(P < 0.01),soil moisture(P < 0.01),NO3?-N(P < 0.05),and litterfall(P < 0.01),indicating that all these factors might be important controlling variables for soil CO2 fluxes.This study sheds some light on our understanding of soil CO2 flux dynamics in forest plantations under various management practices. 关键词：CO2通量森林土壤拆除物种固氮尾叶桉人工林乌拉圭回合森林管理

相关文献

参考文献（60）
引证文献（3）
耦合文献（359）

参考文献(60)

引证文献(3)

耦合文献(359)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Forest soil CO_2 fluxes as a function of understory removal and N-fixing species addition

参考文献(60)

引证文献(3)

耦合文献(359)

用户提示