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南亚热带森林植被恢复演替序列的土壤有机碳氮矿化
  • ISSN号:1001-9332
  • 期刊名称:《应用生态学报》
  • 时间:0
  • 分类:Q948.113[生物学—植物学]
  • 作者机构:[1]中国科学院华南植物园鼎湖山森林生态系统定位研究站,广东肇庆 526070, [2]中国科学院研究生院,北京 100039
  • 相关基金:国家自然科学基金资助项目(30470306,30590381).
中文摘要:

采用室内培养的方法,分析了南亚热带鼎湖山森林植被恢复演替序列不同阶段代表性森林-马尾松林、针阔叶混交林和季风常绿阔叶林土壤(0~10 cm)CO2、CH4排放/吸收和有机氮矿化的差异.结果表明:3种森林土壤培养52周的CO2-C累积排放量分别为(30.66±3.36)、(58.17±7.25)和(59.31±13.58) mg·kg^-1,而其中的65.12%、64.41%和64.12%均在前9周被排放;马尾松林土壤的CO2-C累积排放量一直显著小于针阔叶混交林和季风常绿阔叶林;用相符的二库动力学模型模拟的活性库和惰性库的碳矿化速率均呈递减趋势;土壤培养52周吸收CH4的累积量、培养20周有机氮净矿化量和净硝化量均为马尾松林<针阔叶混交林<季风常绿阔叶林(P<0.05),净矿化的有效氮以硝态氮为主.说明森林植被类型的变化改变了土壤有机碳的分解速率,这是其影响土壤有机碳含量的一种内在方式.

英文摘要:

With incubation test, this paper studied the characteristics of organic C and N mineralization in 0-10 cm soil layer under three forest types, i. e., pine (Pinus massoniana) forest (PMF), pine and broad-leaved mixed forest (PBMF) and monsoon evergreen broad-leaved forest ( MEBF), which were in a successional series in Dinghushan Mountain of Southern China. The resuits showed that after incubation for 52 weeks, the cumulative emission of CO2-C from PMF, PBMF and MEBF soil was 30. 66±3.36, 58. 17±7.25 and 59.31 ± 13.58 mg · kg^-1 , respectively, and 64. 12%, 64.41% and 65.12% of which were released in the first 9 weeks. The cumulative emission of CO2-C was always significantly smaller from PMF soil than from PBMF and MEBF soils, and its change pattern over time fitted well with a two-pool kinetic model. The parameters based on the model implicated that the mineralization rates of soil labile and recalcitrant organic carbon tended to decrease with the forest type changing from PMF to PBMF and MEBF. The cumulative amount of CH4 after 52 weeks incubation and the net production of available N and nitrate after 20 weeks incubation were significantly higher in MEBF soil than in PBMF soil, and also, in PBMF soil than in PMF soil. NO3^--N was the dominant form in net available N production. The change in soil organic carbon mineralization rate caused by forest type change was an inherent way to affect soil organic carbon content.

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期刊信息
  • 《应用生态学报》
  • 北大核心期刊(2011版)
  • 主管单位:中国科学院
  • 主办单位:中国生态学学会 中国科学院沈阳应用生态研究所
  • 主编:沈善敏
  • 地址:沈阳市文化路72号
  • 邮编:110016
  • 邮箱:
  • 电话:024-83970393
  • 国际标准刊号:ISSN:1001-9332
  • 国内统一刊号:ISSN:21-1253/Q
  • 邮发代号:8-98
  • 获奖情况:
  • 中国自然科学核心期刊,中国科学院优秀期刊,中国期刊方阵“双效”期刊
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘(网络版),荷兰地学数据库,荷兰文摘与引文数据库,美国生物医学检索系统,美国生物科学数据库,英国动物学记录,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版)
  • 被引量:98742