四川农业大学学报 ›› 2013, Vol. 31 ›› Issue (01): 15-19.doi: 10.3969/j.issn.1000-2650.2013.01.003

• 研究论文 • 上一篇    下一篇

台湾桤木林草复合生态系统土壤碳氮特征

罗艺霖1,2, 陈栎霖1, 李贤伟1, 范川1, 刘语欣3   

  1. 1. 四川农业大学林学院, 四川 雅安 625014;
    2. 四川农业大学商学院, 四川 都江堰 611830;
    3. 成都市农林科学院, 四川 温江 610011
  • 收稿日期:2013-02-09 出版日期:2013-03-31 发布日期:2017-02-28
  • 通讯作者: 李贤伟,教授,博导,主要从事生态林业工程研究,E-mail:lxw@sicau.edu.cn。 E-mail:lxw@sicau.edu.cn
  • 作者简介:罗艺霖,硕士,助教,主要从事生态林业工程研究,E-mail:565079098@qq.com。
  • 基金资助:
    四川省科技支撑计划(2010NZ0049);国家"十二五"科技支撑项目(2011BAC09B05)

Soil Carbon and Nitrogen Properties in an Alnus formosana Forest-Grass Complex Ecosystem

LUO Yi-Lin1,2, CHEN Yue-lin1, LI Xian-wei1, FAN Chuan1, LIU Yu-xin3   

  1. 1. College of Forestry, Sichuan Agricultural University, Yaan 625014, Sichuan, China;
    2. College of Business, Sichuan Agricultural University, Dujiangyan 611830, Sichuan, China;
    3. Chengdu Academy of Agricultural and Forestry Sciences, Wenjiang 610011, Sichuan, China
  • Received:2013-02-09 Online:2013-03-31 Published:2017-02-28

摘要: [目的] 了解不同台湾桤木林草复合生态系统土壤碳氮特征,探讨林草复合模式对土壤碳氮库的影响。[方法] 以四川省丹棱县退耕还林地台湾桤木+扁穗牛鞭草(Hemarthria compressa)、台湾桤木+黑麦草(Lolium multiflorum)和台湾桤木+自然草(林下自然生长的杂草)3种模式为研究对象,采用土钻法分土层采集各模式下土样,研究其土壤有机碳和全氮特征。[结果] 不同林草模式对土壤有机碳和全氮的影响程度并不一致。3种模式土壤有机碳和全氮含量表明:台湾桤木+牛鞭草 > 台湾桤木+黑麦草 > 台湾桤木+自然草,全氮含量差异显著(P<0.05)。各模式有机碳和全氮含量均随土层增加而显著降低(P<0.05)。3种模式土壤剖面平均C/N表现出:台湾桤木+牛鞭草 > 台湾桤木+自然草 > 台湾桤木+黑麦草,各模式间C/N差异显著(P<0.05)。[结论] 林草复合模式能较好地改善土壤肥力,这为区域退耕还林林草模式水肥管理提供了理论依据。

关键词: 台湾桤木, 林草复合, 土壤有机碳, 全氮, C/N

Abstract: [Objective] Our aim is to underst and properties of soil carbon and nitrogen in an Alnus formosana forest-grass complex ecosystem,and to explore the influence of forest-grass system on soil carbon and nitrogen pools.[Method] Three models,alder (Alnus formosana) +ryegrass (Lolium multiflorum),alder (Alnus formosana) +limpograss (Hemarthria compressa) and Alnus cremastogyne+natural grass were chosen in this study.Soil samples of each model were collected using soil auger.Moreover,organic carbon and total nitrogen were analyzed.[Results] The effect size of vegetation on soil organic carbon and nitrogen was different among the three models.The order of soil organic carbon and nitrogen of three models is alder+limpograss model > alder+ryegrass model > pure alder forest.There was significant differences in soil nitrogen content between two forest-grass models and natural grass system (P<0.05).The contents of soil organic carbon and nitrogen decreased with the increase in soil depth (P<0.05).The soil C/N of three models was alder+limpograss > pure alder forest > alder+ryegrass.Significant differences in C/N were observed among the models (P<0.05).[Conclusion] Forest-grass complex system can effectively improve soil fertility.This provides a theoretical basis for fertilizer and water management of forest-grass complex ecosystem.

Key words: Alnus formosana, forest-grass complex system, soil organic carbon, soil nitrogen, C/N

中图分类号: 

  • S714.8