自然资源学报

自然资源学报 ›› 2007, Vol. 22 ›› Issue (1): 97-105.doi: 10.11849/zrzyxb.2007.01.012

• 资源生态 • 上一篇    下一篇

植被类型对黄土丘陵区流域土壤有机碳氮的影响

马玉红1, 郭胜利1,2, 杨雨林2, 王小利2, 杨光1,2   

  1. 1. 中国科学院、水利部水土保持研究所, 陕西杨凌 712100;
    2. 西北农林科技大学资源与环境学院, 陕西杨凌 712100
  • 收稿日期:2006-09-05 修回日期:2006-10-08 出版日期:2007-02-25 发布日期:2007-02-25
  • 通讯作者: 郭胜利(1969-),男,河北栾城人,副研究员,主要从事土壤生态研究。E-mail:slguo@ms.iswc.ac.cn E-mail:slguo@ms.iswc.ac.cn
  • 作者简介:马玉红(1982-),女,山东潍坊市临朐县人,硕士研究生,主要从事土壤生态研究。
  • 基金资助:

    中科院西部之光项目;中国科学院水土保持研究所领域前沿资助项目“坡面侵蚀过程中泥沙有机碳组分变化与CO2释放”;陕西省自然科学基金“小流域土壤质量性状对土地利用方式变化的响应”项目

Influence of Vegetation Types on Soil Organic C at Yangou Catchment in the Loess Hilly-gully Region

MA Yu-hong1, GUO Sheng-li1,2, YANG Yu-lin2, WANG Xiao-li2, YANG Guang1,2   

  1. 1. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resource, Yangling 712100, China;
    2. Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China
  • Received:2006-09-05 Revised:2006-10-08 Online:2007-02-25 Published:2007-02-25

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118 | 44

摘要： 恢复植被是遏止水土流失和提高土壤有机碳氮(SOC,TSN)积累的重要措施。以黄土丘陵沟壑区燕沟流域为基础,分析了主要植被类型的SOC,TSN变化及其分布特征。结果表明,自然恢复的辽东栎群落SOC含量为29.5g/kg,其次为黄刺玫,狼牙刺群落11.6～21.3g/kg,铁杆蒿(+长芒草)群落为8.4～10.6g/kg。人工建造的刺槐林5.53～11.9g/kg,小叶杨12.8～18.4g/kg,沙棘群落为8.7g/kg,仁用杏为4.7g/kg,苹果园SOC含量3.4～3.9g/kg,退耕苜蓿为4.2g/kg,耕地3.3～4.8g/kg。自然恢复的灌丛群落和人工乔木群落可有效地改变坡面SOC含量与分布。土壤有机碳氮具有显著线性关系,而C/N比例和作用区间随着农田到林地的演变而变大。

关键词: 植被类型, 土壤有机碳, 燕沟流域, 黄土丘陵区

Abstract: Reforestation plays an important role in soil conservation and soil carbon sequestration.Different vegetation types were established in a catchment due to soil loss control in the hilly-gully region of the Loess Plateau.Natural vegetation and replanted vegetation were selected based on typical sites of the Yangou catchment in the region.The community of vegetations selected at the site was identified.Soil organic carbon(SOC)and total soil N(TSN)under different vegetations are compared.For natural vegetations,SOC content under Liaodong oak tree(Q.liaotungensis Koidz.)was 29.5g/kg,Huangcimei(R.xanthina Lindl.)and Potentilla cryptottaeniae thorn(Sophora Davidii)varied from 11.6 to 21.3g/kg,and Iron rod wormwood(A.gmelinii Web.Ex Stechm.)(+S.bungeana Trin)varied from 8.4 to 10.6g/kg.For replanted vegetations,SOC content under pure Robinia crop(Robinia pesudoacacia.L)varied from 5.53 to 11.9g/kg and small-leaf poplar(Populus simonii)from 12.8 to 18.4g/kg.SOC content under Hippophae rhamnoides L.subsp and wood of apricot for kernel were 8.7g/kg and 4.7g/kg,respectively.SOC in orchard(Malus pumila)varied from 3.4 to 3.9g/kg.When farmland converted to alfalfa(M.sativa L.),SOC content increased from3.4 to 4.2g/kg.For cropland,SOC varied from 3.3 to 4.8g/kg.Compared to arable soil,natural vegetation significantly influences surface SOC in the soil profiles,however,SOC in C horizon under natural vegetation was higher than that in arable soil.SOC distribution in arable slope land is significantly different from that under natural recovery of grasses,shrubs,woods and man-built vegetation.Soil C/N ratio increases in the order:orchard,arable land,grassland and woodland.In addition,there was a significant correlation between TSN and SOC at the catchment.

Key words: vegetation, soil organic C, Yangou Catchment, hilly-gully region of the Loess Plateau

中图分类号: 

  • S714.5