广西热带亚热带典型森林岩溶区土壤-植物系统元素分布特征  

Biogeochimical characteristics of elements in soil-plant system in tropical and subtropical typical karst area in Guangxi

作　　者：邓艳[1] 蒋忠诚[1] 蓝芙宁[1] 罗为群[1] 覃星铭[1,2] 

机构地区：[1]中国地质科学院岩溶地质研究所,广西桂林541004 [2]广西师范大学生命科学学院,广西桂林541004

出　　处：《生态环境》2008年第3期1140-1145,共6页Ecology and Environmnet

基　　金：国家自然科学基金项目(40572151);国家“十一五”科技支撑计划项目(2006BAC01A10);中国地质科学院重点开放实验室专项资金资助(KL05-21);岩溶地质研究所所控项目(200708和2008009)

摘　　要：对广西热带亚热带典型岩溶区土壤-植物系统13种元素分布特征及相关性进行了研究。结果表明:与非岩溶区植物相比,岩溶植物Ca、Al含量比较高,Na、Fe、Mn、Si、K、P的含量较低。植物体内元素的分布特点是:叶>茎>根;石灰土更易富集Fe、P、K、Cu、Zn和Co。大多数土壤元素含量随纬度的降低而降低,Fe和Zn表现较为明显,而Mn和Si在热带较中亚热带的更易淋失。土壤中与Fe元素明显相关的元素最多,包括Mn、Zn、Co、S、Al,其相关性分别为Mn>Al>Co>Zn>S,其中,Fe与Mn、S呈负相关,与Zn、Co、Al呈正相关;植物中的Na、Fe、Si、P、Al与土壤中对应的元素相关性显著,呈正相关关系,主要体现在土壤的A层;植物对大量元素的吸收强于对微量元素的吸收,其中,对Mn的吸收能力最强(8229.38%),主要集中在根部的Al(0.57%)和Fe(0.0049%)的吸收能力最小。Karst area of Guangxi, which covers a total area of 9.87 million km2, lead to a series of environmental problems. In order to look into the relationship between organism and surroundings, this paper studied contents of 13 elements and their correlation in the soil-plant system in Nonggang, Nongla and Mulun karst area, Guangxi, The results show that： The contents of Ca and Al in karst plant is higher, while Na, Fe, Mn, Si, K and P is much lower than that ofnon-karst plant. The distribution of elements in plant is： lesf〉stem〉root. The contents of Fe, P, K, Cu, Zn and Co accumulate in limestone soil. Most contents of elements in the soil is descending when the latitude reduces, especially in case of Fe and Zn. Mn and Si are more lose in tropic area than that in sub-tropic. The element Fe in soil is significantly correlated with the element Mn, Zn, Co, S and Al, among which nagativly correlating with is Mn and S, and positive correlated with is Zn, Co and Al; The contents ofNa, Fe, Si, P and Al in plant is significantly positive correlated with the corresponding elements in the soil, especially in the A layer. The absorbtion to-the macroelements is stronger than that ofmicroelements. The absorbtion to Mn （ 8229.38% ） is the strongest and followed byAl （ 0.57% ） and Fe （ 0.0049% ） in the 13 elements,

关 键 词：岩溶 土壤 植物 元素 热带 亚热带 

分 类 号：Q948[生物学—植物学]