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应用生态学报 ›› 1995, Vol. 6 ›› Issue (4): 401-405.

• 研究论文 • 上一篇    下一篇

外源65Zn进入土壤后的扩散及存在形态

李书鼎, 邹邦基, 朱玺   

  1. 中国科学院沈阳应用生态研究所陆地生态系统痕量物质生态过程开放实验室, 沈阳 110015
  • 收稿日期:1995-01-23 修回日期:1995-04-24 出版日期:1995-10-25 发布日期:1995-10-25
  • 基金资助:

    中国科学院陆地生态系统痕量物质生态过程开放实验室基金

Existent forms and their diffusion of Zn supplemented into drab soil

LI Shuding, Zou Bangji, Zhu Xi   

  1. Laboratory of Ecological Process of Trace Substance in Terrestrial Ecosystem, Institute of Applied Ecology, Academia Sinica, Shenyang 110015
  • Received:1995-01-23 Revised:1995-04-24 Online:1995-10-25 Published:1995-10-25

摘要: 利用65Zn示踪和化学连续分级技术研究了外源Zn在褐土中的存在形态。结果表明交换态Zn(EX-Zn)和碳酸盐结合态Zn(CARB-Zn)含量约占土壤总Zn量的67-72%.Zn投加量增加,土壤Zn的强度因数增大。反之,Zn的矿物形态增高。土壤水分4%和100%时,土壤中Zn的扩散系数D分别是7.9×10-8和6.6×10-6cm2·s-1.土壤水分含量在30%和70%时,Zn在施入点的平均停留时间分别是9d和4d.Zn的扩散程度(σ2)也随之从0增大到0.371.

关键词: 外源Zn, Zn存在形态, 褐土, 土壤水分, 入侵植物, 多样性, 线性混合效应模型, 喀斯特, 元分析, 假臭草

Abstract: Studies on existent forms of Zn supplemented into drab soil with tracer technique and chemical sequential extraction procedure show that the amount of exchangeable and carbonate bound 65Zn occupies 63-72% of the total soil Zn.The intensity factor of soil Zn is increased with the increasing amount of added Zn, and its diffusion coefficient (D) at 4 and 100% of soil moisture content is respectively 7.9×10-8 and 6.6 × 10-5cm2s-1. At 30 and 70% of soil moisture content,the average retention time of Zn in applied area is respectively 9 and 4 days,and its diffusion degree (σ2) is increased from 0 to 0.371.

Key words: Supplemented Zn, Existent form of Zn, Drab soil, Soil moisture, karst, invasive plant, meta analysis, linear mixed effect model, diversity, Praxelis clematidea