SHAO Xiangjun, XU Jianchun, WU Jiasen, et al. Changes in Soil Microbial Biomass Carbon and Nitrogen of Carya Cathayensis Plantations Under Intensive Managements[J]. Bulletin of Soiland Water Conservation, 2016, 36(2): 72-75.
DOI:
SHAO Xiangjun, XU Jianchun, WU Jiasen, et al. Changes in Soil Microbial Biomass Carbon and Nitrogen of Carya Cathayensis Plantations Under Intensive Managements[J]. Bulletin of Soiland Water Conservation, 2016, 36(2): 72-75. DOI: 10.13961/j.cnki.stbctb.2016.02.014.
Changes in Soil Microbial Biomass Carbon and Nitrogen of Carya Cathayensis Plantations Under Intensive Managements
[Objective] The differences of soil microbial biomass carbon(MBC) and microbial biomass nitrogen(MBN) in Carya cathayensis stands with different management intensification were explored to provide scientific basis for soil management.[Methods] Soil MBC and MBN collected from four intensive-managed forests(IMF) (5
10
15 and 20 years
respectively) were assayed and compared with the corresponding values of natural broadleaf forest(0 year).[Results] Soil MBC and MBN
MBC/MBN and MBC/SOC decreased significantly at the first 10 years after conversion from evergreen and deciduous broadleaf forest(EDBE) to intensive-managed forest(IMF)
and then increased slowly. In comparison with the corresponding value of EDBF(0 year)
MBC
MBN and MBC/SOC in 0-10 cm soil layer of chinese hickory forest with 10-year intensive management decreased by 52.1%
32.0% and 31.0%
respectively. These indices were also lower than those corresponding values of stands with other intensive management years. Soil MBC/MBN with 10-year intensive management was lower than the values of stand before 10-years; Soil MBN/TN remained stable under different years. [Conclusion] Soil MBC and MBN of Carya cathayensis stands decreased remarkably after intensive-management was conducted.
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Effects of Intensive Management on Carbon Content of Soil Humus Composition in Carya Cathayensis Forest
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