干旱区生态环境知识资源中心(Arid): 绿洲农田不同深度土壤粒径分布特性及其影响因素以策勒绿洲为例

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	绿洲农田不同深度土壤粒径分布特性及其影响因素以策勒绿洲为例
其他题名	Analysis on Soil PSD and Its Affecting Factors at Different Depths in Oasis Farmland A Case Study in the Qira Oasis
	桂东伟; 雷加强; 曾凡江; 穆桂金; 潘燕芳; 李开封
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2011
卷号	28 期号:4 页码:622-629
中文摘要	绿洲土壤环境变异状况及其影响因素的研究对于维护绿洲稳定、绿洲化进程的合理发展具有重要意义。以塔里木盆地南缘策勒绿洲为研究区,根据农田为绿洲主要土地利用方式的特点,通过其不同深度土壤粒径分布(PSD)物理特性的探讨,描述绿洲农田PSD的差异性,同时对其影响因素进行分析。基于绿洲范围内取样点0～20cm,20～40 cm,40～60 cm和80～100 cm深度PSD数据,利用分形理论对PSD进行描述,通过PSD分维值的计算比较、聚类分析,结果表明:取样点间各深度PSD均存在显著性差异,其中农田利用年限及空间位置差异性是PSD分异的主要原因。在60 cm深度范围内,农田利用年限是PSD分异的主导因素,尤其对0～20 cm深度PSD影响显著;而随着深度增加其影响逐渐减弱,80～100 cm深度则已无重要影响。因此,在绿洲及绿洲化进程中,保障农田的可持续性耕作将对PSD及土壤环境产生积极的影响。
英文摘要	It is important to characterize the change of soil environment and its affecting factors in oasis for protecting oasis stability and achieving rational development in the process of oasification.In this study,the Qira Oasis was selected as the study area to analyze the change of soil particle size distribution(PSD,an important soil physical property)and its affecting factors at different depths based on the fact that farmland was the main land use type in the oasis.Fractal theory was used to describe PSD based on the PSD data at depths of 0-20 cm,20-40 cm,40-60 cm and 80-100 cm in sample plots in the oasis.According to the comparing and clustering analysis of PSD fractal dimension,the study result revealed that there was a significant difference of PSD among the sample plots at each depth,and the differences of farmland use years and locations were the main reasons resulting in the difference of soil PSD.At the depth of 60 cm,the dominant factor resulting in the difference of soil PSD was the farmland use years,especially at depth of 0-20 cm.However,its effect was gradually decreased with the increase of depth,and even there was no any important effect at depth of 80-100 cm.Therefore,there is a positive effect for PSD and soil environment to protect farmland which ensure the sustainable cultivation of farmland in the process of oasification.
中文关键词	绿洲 ; 农田 ; 土壤粒径分布 ; 分形理论 ; 策勒
英文关键词	oasis farmland soil particle size distribution fractal theory Qira
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:4255655
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226528
作者单位	中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	桂东伟,雷加强,曾凡江,等. 绿洲农田不同深度土壤粒径分布特性及其影响因素以策勒绿洲为例[J]. 中国科学院新疆生态与地理研究所,2011,28(4):622-629.
APA	桂东伟,雷加强,曾凡江,穆桂金,潘燕芳,&李开封.(2011).绿洲农田不同深度土壤粒径分布特性及其影响因素以策勒绿洲为例.干旱区研究,28(4),622-629.
MLA	桂东伟,et al."绿洲农田不同深度土壤粒径分布特性及其影响因素以策勒绿洲为例".干旱区研究 28.4(2011):622-629.