title: The Effect of Afforestation on Soil Moisture Content in Northeastern China.
abstract: Widespread afforestation programs sequester carbon from the atmosphere and mitigate the rising of atmospheric carbon dioxide (CO2). Meanwhile, afforestation carbon sequestration may cost soil water. However, changes in soil moisture content (SMC) after large-scale afforestation or reforestation have rarely been quantified. In this study, we measured changes in SMC following afforestation using a paired plots method with data from 757 plots in Northeastern China. We found a marginally significant decline in soil moisture content of the top 1-m soil (SMC0-1m) after afforestation (P = 0.08) at the regional scale. The SMC responses to afforestation also vary across species. For example, significant SMC decrease are found for Populus spp. plantations (P < 0.05) and plantations of Pinus sylvestris var. mongolica (P < 0.05). Splitting the first meter of the soil profile into different depth intervals revealed that SMC declined significantly in shallow layers (0-30 cm) for Populus spp. and Pinus sylvestris var. mongolica. We also found that when SMC in the control exceeded a specific threshold, SMC for all five tree species considered tended to decrease, suggesting that the effects of afforestation on soil hydrology vary across different regions.
authors: Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
authors: Yitong
authors: Y
authors: Yao
authors: Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
authors: Xuhui
authors: X
authors: Wang
authors: Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
authors: Zhenzhong
authors: Z
authors: Zeng
authors: Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
authors: Yongwen
authors: Y
authors: Liu
authors: Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
authors: Shushi
authors: S
authors: Peng
authors: Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
authors: Zaichun
authors: Z
authors: Zhu
authors: Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
authors: Shilong
authors: S
authors: Piao
mesh_terms: D002244:Carbon / Q000032:analysis; D002681:China; D017753:Ecosystem; D052918:Environmental Restoration and Remediation / Q000379:methods*; D016468:Forestry / Q000379:methods*; D012987:Soil / Q000737:chemistry*; D014197:Trees; D014867:Water / Q000378:metabolism*
chemical_list: D012987:Soil; D014867:Water; D002244:Carbon