干旱区生态环境知识资源中心(Arid): 石羊河下游民勤湖区土壤特性的空间分异研究

Arid

	石羊河下游民勤湖区土壤特性的空间分异研究
其他题名	Study on Spatial Variations of Soil Properties in Minqin Lake Area of Shiyang River Lower Reaches
	张凯 1; 冯起2 ; 吕永清 3; 张勃 3; 李巧珍 4; 司建华2
来源期刊	土壤
ISSN	0253-9829
出版年	2012
卷号	44 期号:5 页码:838-845
中文摘要	通过野外试验和室内分析,对石羊河下游民勤湖区土壤盐分、pH值和养分的空间分异进行了研究。结果表明:土壤电导率和pH值、速效钾含量都是荒漠区最大,绿洲区最小,而碱解氮和速效磷含量则是绿洲区最大,荒漠区最小。垂直方向上,土壤电导率和pH值变化略显复杂。研究区土壤养分表现为"丰氮、富钾、贫磷"的总体特征;在水平和垂直方向上,土壤电导率和氮、磷、钾都属于中等变异,pH值属于弱变异;土壤电导率值除了表层与60 cm土层表现为中等自相关,其余的都呈纯金块效应,说明研究区土壤的电导率值很容易受到随机因素的影响;土壤pH值属于中等或强自相关性,各层的块金值不大,说明pH值主要受自然因素的影响;土壤养分指标中,碱解氮与速效钾属中等或强自相关性,速效磷则表现为纯金块效应,完全受随机因素影响。
英文摘要	Based on field tests and laboratory analyses, spatial variations of soil salt, pH value and nutrients in Minqin Lake area of Shiyang River lower reaches were studied. The results showed that the maximum of soil conductivity, soil pH value and available potassium were located in desert region and the minimum in oasis, while the maximum of available nitrogen and available phosphorus were located in oasis and the minimum in desert. The changes of soil conductivity and soil pH value were slightly complicated from the top to deeper layer. Soil nutrients in the study area were of abundant nitrogen, rich potassium but poor phosphorus; in horizontal and vertical direction, soil conductivity, N, P, and K all showed medium variation, while soil pH value small variation. Only soil conductivity of the top layer and at 60 cm had medium degrees of autocorrelation. Soil conductivity of other layers all showed pure nugget effect, showing it was easily affected by random factors. Soil pH value showed medium or strong autocorrelation. The nugget of pH value was small in each soil layer, meaning it was mainly affected by natural factors. Available nitrogen and potassium showed medium or strong autocorrelation. Available phosphorus showed pure nugget effect, meaning it was affected by random factors.
中文关键词	土壤 ; 盐分 ; pH值与养分 ; 空间分异 ; 民勤湖区
英文关键词	Soil Salt pH value and nutrients Spatial differentiation Minqin Lake area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4673052
来源机构	中国科学院西北生态环境资源研究院 ; 西北师范大学 ; 中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228659
作者单位	1.中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国; 2.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国; 3.西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国; 4.甘肃省定西市气象局, 定西, 甘肃 743000, 中国
推荐引用方式 GB/T 7714	张凯,冯起,吕永清,等. 石羊河下游民勤湖区土壤特性的空间分异研究[J]. 中国科学院西北生态环境资源研究院, 西北师范大学, 中国气象局兰州干旱气象研究所,2012,44(5):838-845.
APA	张凯,冯起,吕永清,张勃,李巧珍,&司建华.(2012).石羊河下游民勤湖区土壤特性的空间分异研究.土壤,44(5),838-845.
MLA	张凯,et al."石羊河下游民勤湖区土壤特性的空间分异研究".土壤 44.5(2012):838-845.