干旱区生态环境知识资源中心(Arid): 封育对荒漠草原苦豆子群落土壤粒径分形特征的影响

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	封育对荒漠草原苦豆子群落土壤粒径分形特征的影响
其他题名	Effect of Fencing on the Fractal Characteristics of Soil Particle Size in Desert Steppe
	赵盼盼; 李国旗; 邵文山; 靳长青
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2017
卷号	37 期号:6 页码:1234-1241
中文摘要	该研究以宁夏盐池荒漠草原区苦豆子(Sophora alopecuroides)群落为研究对象,通过野外采样和实验室分析,研究了围封对苦豆子群落土壤颗粒分形维数的变化特征以及分形维数与土壤理化性质的关系。结果表明:(1)与围栏外相比,围栏处理样地的黏粒(<2mum)体积百分比含量增加,在0~10、10~20和20~40cm土层差异显著;粉粒(2~50mum)体积百分比含量在0~10cm土层显著增加;而砂粒(50~250mum)体积百分比含量减少,在0~ 10和10~20cm土层差异显著,围封可促使土质细粒化。(2)与围栏外相比,围栏内土壤有机碳、全N、全P、碱解氮、速效磷含量均有所提高,其中0~10cm土层分别增加了177.70%、155.70%、60.11%、120.42%、179.40%,10~20cm土层土壤有机碳、全N、全P、速效磷含量增加比例分别为202.80%、36.50%、27.78%和s37.30%,20~40 cm土层土壤养分变化不显著,说明围栏封育使土壤养分主要富集在0~20cm土层,其中0~10cm土层富集达到显著水平。(3)苦豆子群落围栏内的土壤粒径分形维数在2.64~2.69之间,围栏外的分形维数在2.59~2.64之间;与围栏外相比,围栏内土壤粒径分形维数在0~10和10~20cm土层增加显著。(4)土壤粒径分形维数与土壤粒径分布、土壤有机碳、全N、全P、碱解氮、速效P含量均呈显著的线性关系,说明分形维数可以作为一个衡量土壤肥力、土壤结构以及退化土壤恢复程度的综合性指标。
英文摘要	In this paper,we set an object of study in the desert steppe in Ningxia,based on the field sampling and laboratory analysis.The characteristics of the fractal dimension of the soil and the relationship between fractal dimension and soil properties were studied.The results showed that:(1)there was more fine grained soil after enclosure.The clay(<2mum)content increased significantly in 0-10cm,10-20cm and 20-40cm soil layers(P<0.05).The silt sand(2-50mum)content increased significantly in 0-10cm soil layer(P<0.05).The sand(50-250mum)content decreased in 0-10cm,10-20cm soil layer(P< 0.05).(2)Soil nutrients accumulated after enclosure.The organic carbon,TN,TP,alkali-hydrolyzable nitrogen,available phosphorus content of soil were higher.In 0-10cm soil layer,the organic carbon, TN,TP,alkali-hydrolyzable nitrogen,available phosphorus content increased by 177.70%,155.70%, 60.11%,120.42%,and 179.40%,respectively.In 10-20cm soil layer,the soil organic carbon,TN, TP,available phosphorus content increased by 202.80%,36.50%,27.78% and 37.30%,respectively. The soil nutrient change is not significant in 20-40cm soil layer(P>0.05).Obviously,enriched nutrients were distributed mainly in the 0-20cm layer and concentrated in 0-10cm layer(P<0.05).(3)In the enclosed plot,the fractal dimension of soil is of between 2.64-2.69,and the fractal dimension of the outside fence is 2.59-2.64.Compared with outside fence,the fractal dimension of soil in the enclosed plot increased significantly in 0-10cm and 10-20cm(P<0.05).(4)The soil fractal dimension and soil particle size distribution,the organic carbon,TN,TP,alkali-hydrolyzable nitrogen,available phosphorus content all showed a linear relationship.The results show that fractal dimension can be used as a comprehensive index to measure soil fertility,soil structure and soil restoration.
中文关键词	苦豆子群落 ; 荒漠草原 ; 封育 ; 分形维数 ; 土壤理化性质
英文关键词	Sophora alopecuroides community desert steppe fencing fractal dimension soil physicochemical properties
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES ; AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Plant Sciences ; Agriculture
CSCD记录号	CSCD:6022031
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236815
作者单位	宁夏大学, 西北土地退化与生态恢复国家重点实验室培育基地;;西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	赵盼盼,李国旗,邵文山,等. 封育对荒漠草原苦豆子群落土壤粒径分形特征的影响[J]. 宁夏大学,2017,37(6):1234-1241.
APA	赵盼盼,李国旗,邵文山,&靳长青.(2017).封育对荒漠草原苦豆子群落土壤粒径分形特征的影响.西北植物学报,37(6),1234-1241.
MLA	赵盼盼,et al."封育对荒漠草原苦豆子群落土壤粒径分形特征的影响".西北植物学报 37.6(2017):1234-1241.