欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2002, Vol. ›› Issue (6): 672-674.

• 研究论文 • 上一篇    下一篇

林地开垦后坡面土壤元素的时空变化特征

张成娥, 郑粉莉   

  1. 中国科学院水利部水土保持研究所, 西北农林科技大学, 杨凌 712100
  • 收稿日期:2000-04-23 修回日期:2000-10-20
  • 通讯作者: 张成娥,女,1957年生,研究员,主要从事土壤肥力及土壤微生物学研究,发表论文30余篇.E-mail:zhangc-e@nwsuaf.edu.cn
  • 基金资助:
    国家自然科学基金项目(49871050);中国科学院知识创新工程(KZCX106)资助项目

Temporal and spatial change characteristics of soil elements in reclaimed slope forestland

ZHANG Cheng'e, ZHENG Fenli   

  1. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100
  • Received:2000-04-23 Revised:2000-10-20

摘要: 土壤中常量元素Ca、Mg和微量元素Cu、Zn、Mn、Fe是植物生长必需的重要元素,也是评价土壤质量的重要指标.林地被开垦破坏后,坡面土壤元素的空间分布受人为犁耕活动、侵蚀沉积搬运过程和元素性质的影响.林地开垦初期(1~2年),坡面不同部位土壤Cu、Zn、Mn、Fe、K、Ca和Mg皆增加;而开垦两年后,受土壤侵蚀的影响,这些元素又趋于下降;开垦6年后,Cu、Fe、K和Mg比开垦前下降了1.5%~4.56%.SiO2含量在坡面上部随开垦年限的增加而增加,在坡面中部则随开垦年限而减少.Al的变化则与SiO2相反.

关键词: 开垦年限, 土壤元素, 时空变化, 子午岭林区, 线粒体COI基因, 海蜇, 遗传结构, 遗传特征, 生活史

Abstract: Calcium,Magnesium,Copper,Zinc,Manganese and Iron are necessary elements for plant growth and important indicators for soil quality evaluation. After forestland being reclaimed,spatial distributions of soil elements would be affected by plowing,erosion-deposition-transportation,and soil element properties. In the initial stage of forestland being reclaimed (the first and second year),Cu,Zn,Mn,Fe,K,Ca,and Mg in different slope locations would be increased. After two years,these elements would be decreased because of soil erosion. After six years,Cu,Fe,K,and Mg would be decreased by 1.5~4.56%.SiO2 content on the upper slope would be increased as reclaimed year increased,but on the middle slope,SiO2 content would be decreased and Al element would be increased.

Key words: Reclaimed years, Soil elements, Temporal and spatial change, Ziwuling forest area, genetic structure, Rhopilema esculentum, COI gene, genetic characterization, life-cycle.

中图分类号: