干旱区生态环境知识资源中心(Arid): 华北山地土壤CaCO_3含量/石灰反应垂直分布特征及其发生学解释

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	华北山地土壤CaCO_3含量/石灰反应垂直分布特征及其发生学解释
其他题名	Vertical Distribution of Soil CaCO_3 Content / Lime Reaction in Mountainous Regions of North China and Its Genetic Explanation
	李超 1; 张凤荣 1; 王秀丽 2; 郑亚楠 1; 张天柱 1; 谢臻 1; 靳东升 3
来源期刊	土壤学报
ISSN	0564-3929
出版年	2018
卷号	55 期号:5 页码:1074-1084
中文摘要	为了探究华北山地土壤CaCO_3含量/石灰反应垂直分布特征及其发生学解释,对北京市、山西省257个山地土壤剖面的机械组成、CaCO_3含量和石灰反应进行统计分析。结果表明:华北山地表土的机械组成以粉砂为主,与黄土相似,说明黄土降尘是土壤矿物质的重要来源;海拔>1 500 m的中山和高山地区的剖面,由于CaCO_3淋洗强,造成无论何种成土母质,CaCO_3被淋洗出土体,土壤通体无石灰反应;海拔介于500~1 500 m的中山地区和低山地区的剖面,CaCO_3淋洗弱,土壤普遍具有石灰反应,成土母质对土壤中CaCO_3含量/石灰反应起主导作用,生物气候条件的影响居于次要地位;海拔<500 m的低山丘陵地区的剖面,各土层的CaCO_3含量/石灰反应无明显分布规律。结论:黄土降尘为华北山地表土输入了碳酸钙,但由于不同海拔高度地区土壤湿度存在差异,导致土壤CaCO_3淋溶程度和含量差异明显。淋溶过程强弱导致的土壤CaCO_3含量/石灰反应垂直分布特征是华北山地土壤的典型发生学特征之一,不同海拔高度起主导作用的因素有所不同。研究成果可为华北山地土壤调查、发生与分类研究提供参考。
英文摘要	【Objective】Papers available in the literature show that loess dust precipitation exists generally in North China, becoming an important source of topsoil in the region. It brings in a large amount of fine mineral particles and nutrient elements, especially, CaCO_3, to the soil. CaCO_3 is an important component of the soils in arid, semi-arid and semi-humid regions, and hence a major indicator reflecting development degree of a soil. The purpose of this paper is to study vertical distribution of CaCO_3 content and its characteristics in the mountainous soil of North China, in an attempt to explain causes of this phenomenon from the perspective of soil genesis. 【Method】A total of 257 soil profiles of various soil series in Beijing and Shanxi Province were investigated for mechanical composition, CaCO_3 content and lime reaction and statistic analysis was performed of the data. On such a basis, vertical distributions of CaCO_3 content and lime reaction in the mountainous soils of North China and their characteristics were summarized, and causes of the phenomena explained with the theory of soil genesis.【Result】Results show that the topsoil in North China is mainly composed of silt, which is similar to loess, indicating that loess dust precipitation is an important source of soil minerals, bringing in CaCO_3 to the topsoils of the mountainous soils in North China. As soil humidity varies sharply from area to area due to difference in elevation, soil CaCO_3 content does too. In areas above 1 500 meters in elevation, the soils are quite high in humidity (varying in the humid and damp regime) due to relatively high precipitation (mean annual precipitation of over 600 mm) and relatively low temperature (varying in the gelic or cryic soil temperature regime), and good to vegetation, which in turn reduces surface runoff, but enhances downward leaching of CaCO_3. As a result CaCO_3 is leached out of the soil, no matter what it is derived from, and no lime reaction is detected throughout the solum. So in these areas, bio-climatic conditions play a leading role affecting soil CaCO_3 content and lime reaction. However, in areas ranging between 500 and 1 500 meters in elevation, the soils are relatively low in soil humidity (varying in the semi-arid-humid/humid regime) due to relatively low precipitation (mean annual precipitation of < 600 mm) and higher soil temperature (varying in the frigid/temperate regime), and hence not so good to vegetation, As a result, CaCO_3 leaching is weakened and lime reaction could be found almost everywhere. Therefore in these areas bio-climate conditions descend from the leading role to a major role, following behind the role of parent material. Whatever, no obvious characteristic of the distribution of soil CaCO_3 content and lime reaction could be summarized in areas below 500 meters in elevation.【Conclusion】In conclusion, the characteristics of the vertical distribution of soil CaCO_3 content / lime reaction caused by leaching process, strong or weak, is one of the typical soil genetic characteristics of the mountainous soils in North China.
中文关键词	华北地区 ; 黄土降尘 ; CaCO_3含量 ; 石灰反应 ; 土壤发生
英文关键词	North China Loess dust precipitation CaCO_3 content Lime reaction Soil genesis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6338541
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238422
作者单位	1.中国农业大学土地科学与技术学院, 北京 100193, 中国; 2.河南农业大学资源与环境学院, 郑州, 河南 450002, 中国; 3.山西省农业科学院农业环境与资源研究所, 太原, 山西 030006, 中国
推荐引用方式 GB/T 7714	李超,张凤荣,王秀丽,等. 华北山地土壤CaCO_3含量/石灰反应垂直分布特征及其发生学解释[J]. 中国农业大学,2018,55(5):1074-1084.
APA	李超.,张凤荣.,王秀丽.,郑亚楠.,张天柱.,...&靳东升.(2018).华北山地土壤CaCO_3含量/石灰反应垂直分布特征及其发生学解释.土壤学报,55(5),1074-1084.
MLA	李超,et al."华北山地土壤CaCO_3含量/石灰反应垂直分布特征及其发生学解释".土壤学报 55.5(2018):1074-1084.