[Effects of tree species transfer on soil dissolved organic matter pools in a reforested Chinese fir (Cunninghamia lanceolata) woodland].
Based on the comparison between reforested 19-year-old Mytilaria laosensis and Cunninghamia lanceolata plantations on cut-over land of C. lanceolata, effects of tree species transfer on soil dissolved organic matter were investigated. Cold water, hot water and 2 mol x L(-1) KCl solution were used to extract soil dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) from 0-5, 5-10 and 10-20 cm soil layers. In M. laosensis plantaion, the concentrations of soil DOC extracted by cold water, hot water and 2 mol L(-1) KCl solutions were significantly higher than that in C. lanceolata plantation. In the 0-5 and 5-10 cm layers, the concentrations of soil DON extracted by cold water and hot water in M. laosensis plantation were significantly higher than that in C. lanceolata plantation. The extracted efficiencies for DOC and DON were both in order of KCl solution > hot water > cold water. In the 0-5 cm layers, soil microbial biomass carbon (MBC) under M. laosensis was averagely 76.3% greater than under C. lanceolata. Correlation analysis showed that there were significant positive relationships between hot water extractable organic matter and soil MBC. Differences in the sizes of soil DOC and DON pools between the M. laosensis and C. lanceolata forests might be attributed to the quality and quantity of organic matter input. The transfer from C. lanceolata to M. laosensis could improve soil fertility in the plantation.
Xiao-Hua
XH
Wan
Zhi-Qun
ZQ
Huang
Zong-Ming
ZM
He
Zhen-Hong
ZH
Hu
Zai-Peng
ZP
Yu
Min-Huang
MH
Wang
Yu-Sheng
YS
Yang
Shao-Hui
SH
Fan
D018533:Biomass; D002244:Carbon / Q000032:analysis; D032486:Cunninghamia; D065928:Forests; D029201:Hamamelidaceae; D009584:Nitrogen / Q000032:analysis; D009930:Organic Chemicals / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D012988:Soil Microbiology; D014197:Trees
D009930:Organic Chemicals; D012987:Soil; D002244:Carbon; D009584:Nitrogen