Research on the property of soil geochemistry in typical karst area in Guizhou Province
-
摘要: 以贵州花溪党武、遵义虾子和安龙木咱3个地区的土壤为主要研究对象，从地球化学的角度研究其土壤中相关矿物元素的含量、元素在岩-土剖面中的迁移富集特征及其风化成土系数，综合表征出研究区土壤的农业地质环境特征，并对其矿物营养元素环境质量做出初步评价。研究结果表明，石灰土中矿物营养元素的淋溶较为强烈，有10种左右元素的含量低于中国或世界土壤化学组成中值，具体表现为纯的碳酸盐岩所发育的土壤中矿物营养元素的含量较少，而安龙木咱地区由于其成土母质为白云质灰岩，且所处地质环境易于汇集周边淋溶出来的营养元素，使得其土壤矿物营养元素环境质量好于其余两地，三地土壤中营养元素达标率分别为73.7%（安龙木咱）、63.1%（遵义虾子）和68.4%（花溪党武）。总体而言，碳酸盐岩风化成土作用缓慢，土层较薄，土壤营养元素含量不足，需要施用相应的矿物肥料。Abstract: The main research object of this paper is the soil samples from three sampling sites - Dangwu in Huaxi, Xiazi in Zunyi and Muza in Anlong, in Guizhou Province. The relevant element content and the features in migration process from the rock to soil as well as the laterite-forming capacity coefficient are studied from the point of geochemistry, which shows the synthetic agro-geologic properties in the study area. Furthermore, preliminary evaluation is made on the environmental quality of the mineral nutrient elements in the paper. The results prove that leaching of mineral nutrient elements in limestone is comparatively strong with about 10 kinds of elements lower than the mid-value in China or the world, and the mineral nutrient element content is lower in the soil developed from pure limestone in particular. But the mineral nutrient element content in Anlong is higher than the other two sites for two reasons, first，the parent rock being dolomitic limestone and second, the position of Anlong being easy to collect the elements leached out from the nearby areas. The rate of reaching standard of nutrient elements is 73.7% (Muza in Anlong),63.1%( Xiazi in Zunyi) and 68.4% (Dangwu in Huaxi). Generally speaking, for the slow pedogenesis of carbonatite, the soil layer developed from carbonatite is thin with low nutrient content, so the soil needs being fertilized by some mineral fertilizers.
-
Key words:
- karst /
- geologic environment of the soil /
- nutritive element /
- geochemistry /
- Guizhou
-
[1] 杨小忠，邓自民，杨泊.贵州岩溶石山农业地质环境及其效应［J］.贵州环保科技，1999，5（3）：24-28. [2] 李阳兵,王世杰,李瑞玲,等.关于西南岩溶山区生态建设的一些讨论——以贵州省为例［J］. 中国岩溶,2004,23(1):20-24. [3] 王明章，王尚彦等.贵州岩溶石山生态地质环境［M］.北京：地质出版社，2005.1-13. [4] 贵州省地质矿产局.贵州省区域地质志［M］.地质出版社, 1987. [5] 毕坤.论矿物元素在农作物中的综合平衡效应［J］.贵州地质，1999，15（1）：61-67 [6] 西南农业大学主编.土壤学(南方版)［M］.北京：中国农业出版社，2001.4-192. [7] 于天仁,王振权主编.土壤分析化学［M］.北京：科学出版社，1988.4.327-336. [8] 王世杰,季宏兵,欧阳自远,等.碳酸盐岩风化成土作用的初步研究［J］.中国科学,1999,29(5):441-449. [9] 李景阳，朱立军，王朝富,等.碳酸盐岩风化壳及喀斯特成土作用研究［J］.贵州地质，1996，13（2）：139-145. [10] 李景阳,朱立军,梁风.碳酸盐岩风化壳界面土层的结构和矿物学特征［J］.中国岩溶,2000,19(4):301-307. [11] 宋照亮.喀斯特流域风化成土作用及其矿质元素行为与环境质量［D］.贵阳：中国科学院地球化学研究所，2006. [12] 顾尚义,毛健全,张启厚.广西龙塘蚀变流纹岩风化过程中Ti、Nb、Ta、Zr、Hf、Th的活动性研究［J］. 贵州工业大学学报(自然科学版),2002,31(1):14-18. [13] 曾昭华.贵州生态农业土壤环境质量与作物优质高产的关系［J］.贵州农业科学，2005，33（1）：87-90. [14] 李瑞敏，侯春堂，刘永生,等.农业地质地球化学评价的理论与方法初探［J］.地质科技情报，2005，24（4）：83-86. [15] 陈怀满主编.土壤环境学［M］.北京：科学出版社,2006.548-550. -
点击查看大图
计量
- 文章访问数: 2032
- HTML浏览量: 409
- PDF下载量: 1567
- 被引次数: 0
下载:
