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| 三峡库区土壤营养元素分布特征研究 | |
| 引用本文： | 唐将,李勇,邓富银,付绍红. 三峡库区土壤营养元素分布特征研究[J]. 土壤学报, 2005, 42(3): 473-478 |
| 作者姓名： | 唐将 李勇 邓富银 付绍红 |
| 作者单位： | 1. 成都理工大学地球科学学院,成都,610059 2. 重庆川东南地质调查研究院,重庆,401329 3. 中国科学院地球化学研究所,贵阳,550002 |
| 基金项目： | 国土资源部"十五"重点调查项目(No.200314200006)资助 |
| 摘 要： | 三峡移民工程中土地资源的合理规划利用需要建立在查清区域土壤营养元素背景及分布特征的基础之上,作者利用多目标地球化学调查方法,通过野外实地调查、大面积系统性采集土壤表层样品、测试分析、数理统计,探讨了三峡库区表层土壤中N、P、K、Ca、Mg、S、B、Fe、Mn、Mo、Cl等植物生长必需元素在不同土壤类型中的含量分布特征,以紫色土为例探讨了不同分布高度、不同坡度、不同植被条件对其元素含量分布的影响。结果表明:石灰土是营养元素最丰富的土壤,黄壤是营养元素最低的土壤。母岩对土壤元素分布影响明显,灰岩母岩区土壤营养元素最丰富,砂岩母质区土壤养分元素含量最低;同为碎屑岩类的泥岩、粉砂岩、杂砂岩、砂岩母岩区的土壤相比,泥岩类母岩区的土壤养分元素含量相对较高,粉砂岩母岩区土壤养分元素含量居于泥岩与砂岩母岩区土壤之间。随紫色土分布区地形坡度变化,紫色土Ca、Mg、K元素含量无规律性变化,但随地形坡度变缓,N、S、Mo含量明显增高,Fe、Mn、P含量有增高的趋势;随海拔高度降低,紫色土P、S含量增高,Mn、Mo含量有增高的趋势,而其他元素含量无规律性变化。紫色土在相同的母质、气候及相似的地貌条件下,植被覆盖类型不同,土壤中不同元素分异特征差异明显。总体来说,土壤类型是土壤元素分布的主要控制因素,不同土壤类型的元素含量差异十分显著;不同母质来源的土壤元素差异性显著;紫色土的元素分布除受土壤类型控制外,还受地形坡度、高度、植被条件等其他因素的影响,但不同元素受影响的因素及程度不同。 |
| 关 键 词： | 三峡库区 土壤 营养元素 分布特征 |
| 收稿时间： | 2004-05-28 |
| 修稿时间： | 2004-12-15 |
DISTRIBUTION CHARACTERISTICS OF NUTRITION ELEMENTS IN THE THREE GORGES RESERVOIR DISTRICT |
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| Tang Jiang,Li Yong,Deng Fuyin and Fu Shaohong. DISTRIBUTION CHARACTERISTICS OF NUTRITION ELEMENTS IN THE THREE GORGES RESERVOIR DISTRICT[J]. Acta Pedologica Sinica, 2005, 42(3): 473-478 | |
| Authors: | Tang Jiang Li Yong Deng Fuyin Fu Shaohong |
| Affiliation: | Tang Jiang1 Li Yong1 Deng Fuyin2 Fu Shaohong3 |
| Abstract: | Based on testing results of topsoils, distribution characteristics of plant-growth elements, such as N, P, K, Ca, Mg, S, B, Fe, Mn, Mo, and Cl etc, were discussed by types of soils and rocks, elevations, degrees of slope, and vegetation covering. It can be concluded that calcareous soil is the highest in content of nutritional elements such as B, Ca, Mg, Mn, Mo, N, P, and Fe; where as yellow soil the lowest in content of nutritional elements, such as Ca, Mg, K, P, S, Cl, and Fe. Purple soils are the highest in content of P, K and Cl, but the lowest in content of N, Mo and S. Parent rocks play an important role in distribution of elements in soils. In the limestone area the soils are abundant in nutritional elements except for P, K, and Cl. On the other hand, in the sandstone districts the contents of most nutritional elements in the soils are lowest, but only Ca and B higher than that of greywacke district and siltstone district respectively, and Mo lower than that of the limestone area. Among soils formed from the mudstone, siltstone, greywacke, and sandstone, soils developed from mudstone are highest in most nutrition elements, such as K, Mg, Fe, B, P, and Mn, but relatively lower in Mo and N. The contents of nutritional elements in soils developed from siltstone are higher than those in soils developed from mudstone and lower than those from sandstone. In terms of the degree of slope, the contents of N, S, Mo, Fe, Mn, and P in the purple soils increase with the decline of the degree of slope, but the contents of Ca, Mg, and K do not show such a trend. When the elevation decreases, the contents of P and S in the purple soils increase remarkably, while Mn and Mo increase somewhat, and other elements show irregular change. When the parents, climate and topography are similar, the contents of elements in purple soils are determined by the types of plantcover. Soils in the mixed forest area and tussock area contain more nutritional elements relatively, than soils in the conifer forest area. In areas with little vegetation cover, the soils are higher in S and lower in B and Ca. |
| Keywords: | Three Gorges Reservoir District Soil Nutrition element Distribution characteristics |
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