山核桃集约经营过程中土壤微生物量碳氮的变化

邵香君; 徐建春; 吴家森; 沈振明

doi:10.13961/j.cnki.stbctb.2016.02.014

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山核桃集约经营过程中土壤微生物量碳氮的变化

试验研究

- 山核桃集约经营过程中土壤微生物量碳氮的变化
- Changes in Soil Microbial Biomass Carbon and Nitrogen of Carya Cathayensis Plantations Under Intensive Managements
- 水土保持通报 2016年36卷第2期页码：72-75
- 作者机构：
  
  1. 浙江省临安市林业种苗管理站, 浙江临安,311300
  2. 浙江省开化县林业局, 浙江开化,324300
  3. 浙江农林大学浙江省森林生态系统碳循环与固碳减排重点实验室, 浙江临安,311300
  4. 浙江省临安市林业科技推广总站, 浙江临安,311300
- 作者简介：
- 基金信息：
  
  浙江省科技厅项目"浙江省果品产业创新团队项目"(2009R50033)
- DOI：10.13961/j.cnki.stbctb.2016.02.014
  中图分类号：
- 纸质出版：2016
- 稿件说明：
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邵香君, 徐建春, 吴家森, 等. 山核桃集约经营过程中土壤微生物量碳氮的变化[J]. 水土保持通报, 2016,36(2):72-75.

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.
邵香君, 徐建春, 吴家森, 等. 山核桃集约经营过程中土壤微生物量碳氮的变化[J]. 水土保持通报, 2016,36(2):72-75. DOI： 10.13961/j.cnki.stbctb.2016.02.014.

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.

摘要

[目的] 研究不同集约经营历史山核桃林的土壤微生物量碳氮的演变规律

为山核桃林地土壤管理提供科学依据。[方法] 在浙江省临安市分别采集并分析了经营历史为5

20 a的山核桃林土壤样品

并与天然混交林(0 a)进行比较。[结果] 天然混交林改造为山核桃纯林并经集约经营后

林地土壤微生物量碳(MBC)、微生物量氮(MBN)、MBC/MBN

MBC/SOC均表现出先下降而后上升的趋势

经过10 a经营后降到最低水平

与0 a相比

0-10 cm土层MBC

MBN和MBC/SOC分别降低了52.1%

32.0%和31.0%。经营10 a的林地土壤MBC/MBN显著低于前期经营林地

而MBN/TN在经营过程中的差异并不显著。[结论] 山核桃集约经营后

林地土壤微生物量碳氮含量显著下降。

Abstract

[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

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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