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植物研究 ›› 2007, Vol. 27 ›› Issue (5): 596-600.doi: 10.7525/j.issn.1673-5102.2007.05.020

• 论文 • 上一篇    下一篇

不同生长期茶树对土壤中铅的吸收及体内运移特性研究

宗良纲1;周 俊2;李嫦玲1;余文高3;单桂仙3   

  1. 1.南京农业大学资源与环境学院,南京 210095 2.常州市环境监测中心站,常州 213001 3.宜兴市阳羨茶场,宜兴 214241
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-09-20 发布日期:2007-09-20
  • 通讯作者: 宗良纲
  • 基金资助:
     

Study on Characteristics of Absorption and Transfer of Soil Lead in Tea Plant with Different Growth Period

ZONG Liang-Gang;ZHOU Jun;LI Chang-Ling;YU Wen-Gao;SHAN Gui-Xian   

  1. 1.College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095 2.Changzhou Environmental Monitoring Station,Changzhou 213001 3.Yangxian Tea Plantation of Yixing,Yixing 214241
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-09-20 Published:2007-09-20
  • Contact: ZONG Liang-Gang
  • Supported by:
     

摘要: 选取江苏省宜兴市阳羡茶场的新、老两个茶园进行实地试验,分析了幼年期和成年期茶树各部位中铅含量的差异,以及茶树各部位铅含量与土壤铅含量的相关性;同时通过向茶园土壤进行投加铅处理后,分析土壤Pb污染条件下茶树吸收铅的特性以及不同生长期茶树对土壤中铅的富集和运移规律。结果表明,铅在茶树各部位含量分布的一般趋势为:侧茎>老叶>主茎>侧根>主根>嫩叶,侧茎比茶树其余部位中的铅含量高出3倍以上;对于不同生长期的茶树而言,幼年期茶树嫩叶的铅含量较成年期茶树嫩叶的高。同时茶树各部位铅含量与土壤铅含量的相关性分析的结果表明,茶树根与土壤中的铅含量相关性最为显著,其次为叶,再次为茎。当土壤受到铅污染后,茶树各部位的铅含量均有所增加,其中侧根和主根中铅的增加量最为明显;随着土壤铅污染时间的延续,茶树各部位中的铅逐渐向侧茎集聚,使侧茎的含铅量在茶树各地上部分中居于最高水平。

关键词: 铅, 茶树, 吸收特性, 运移

Abstract: Through field experiment in Yangxian tea plantation of Yixin city, the difference of lead content in each part of immature and mature tea plant was studied, and the correlation of lead content between each part of tea plant and soil were also analyzed. The result showed that there was obvious difference of lead content in different part of tea plant, and the distribution arrange of lead content was as follows: lateral branch>old leaf>stalk>side root>main root>young leaf. The content of lead in lateral branch was more three times than that in other part of tea plant, and the lead content of young leaf in immature tea plant was higher than that in mature one. At the same time, the correlation analysis results about content of lead in each part of tea plant and in soil showed that correlation of lead content between in soil and in tea root is more obvious than that in others parts of tea plant. When lead pollution occurred in soil of tea plantation, content of lead in each part of tea plant increased. It was showed that the content of lead in side root and main root increased rapidly, and with the prolonged pollution, lead in each part of tea gradually drew toward lateral branch. So the content of lead in branch lateral would show more and more, ultimately becoming the most in aboveground of tea plant.

Key words: lead, tea plant, characteristics of absorption, transfer

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