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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (20): 349-352.

所属专题： 现代农业发展与乡村振兴

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

典型岩溶农业区洼地和坡地的元素迁移特征差异

覃星铭 蒋忠诚 邓 艳 吴华英 罗为群   

  • 收稿日期:2010-05-17 修回日期:2010-06-13 出版日期:2010-10-20 发布日期:2010-10-20
  • 基金资助:

    国家“十一五”科技支撑计划项目;国家自然科学青年基金项目;中国地质科学院岩溶地质研究所基本科研业务专项项目;中国地质科学院岩溶与石漠化治理重点开放实验室专项资金项目

Characteristic contrast of element migration in typical agricultural depression and slope land.

  • Received:2010-05-17 Revised:2010-06-13 Online:2010-10-20 Published:2010-10-20

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摘要：

摘要：本文以桂林会仙典型岩溶洼地和坡地两种不同地貌部位为研究点，以石灰岩地质背景条件下的基岩—土壤—土壤水—植物体系统中的元素含量和组成特征为研究对象，探讨不同地貌部位条件下元素的基本特点、制约因素和变化趋势。研究结果表明，在岩溶动力条件的驱动下，岩溶区形成了显著的偏碱环境特征；洼地和坡地土壤剖面元素和土壤水含量特征差异明显，植物对土壤元素的生物吸收系数比较低，属于受氮限制的类型；坡地部位的偏碱富钙和水分胁迫程度更为严重；同一石灰岩地质背景条件下不同地貌部位岩溶系统元素迁移特征差别显著。

关键词: 棉花, 棉花, 农杆菌介导, 植酸酶基因, 胚性愈伤, 遗传转化

Abstract:

Abstract: Take the elements migration characteristics of rock - soil - soilwater - plant system as the research objects which located on two different geomorphological sites of karst peak cluster-depression in huixian,guilin. Comparative analysis of basic characteristic, restrict factors and mutative trend of elements which on the depression and slope land.The results show that, It forms a remarkable feature of partial alkaline environment in the karst dynamic driving conditions. There is an ovbvious distinction of the soil profile elements between the depression and slope land. And the vertical elements’ changes of soil- water also shows a significant difference. The plants soil biological absorption coefficient is low,and the plant is the type of subjecting to restrictions of nitrogen. The feature of partial alkaline calcium-rich in the slope land is worse. The results show that there is a significant difference of the element migration between depression and slope land.

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