干旱区生态环境知识资源中心(Arid): 基于肥岛效应探讨人工梭梭土壤养分时空演变趋势

Arid

	基于肥岛效应探讨人工梭梭土壤养分时空演变趋势
其他题名	Exploring the Temporal and Spatial Evolution Trend of Soil Nutrients of Different Plantation Ages Based on the Fertile Island
	陈婧 1; 崔向新 1; 丁延龙 1; 王则宇 2; 刘宗奇 3; 石涛 1
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2019
卷号	26 期号:6 页码:71-79
中文摘要	为阐明不同林龄人工梭梭对干旱荒漠区土壤养分利用机制及时空演变趋势,选取了乌兰布和西南缘营建年限为2,5,10,15,30a的人工梭梭为研究对象,通过野外调查与室内试验的方法,分析了不同林龄梭梭土壤养分空间分布及其富集效应。结果表明:(1)人工梭梭土壤养分表现出显著的成层化分布特征,整体表现为010cm>1020 cm>2040cm,其中表层土壤有机质、碱解氮、速效磷和速效钾均比深层平均高82.0%,228.2%,172.7%,39.0%,表层土壤养分积累更明显,说明表层土壤中的大部分养分主要从植物的枯落物质中获得。(2)水平方向土壤养分含量在15~30a表现出显著差异,根部、灌丛内及株间空地土壤有机质、碱解氮、速效磷及速效钾分别增高了30.8%和38.0%,196.7%和15.6%,22.5%和8.3%,56.4%和10.6%,且富集率显著高于其他林龄,表层(010cm,1020cm)表现出随林龄增高而增加的趋势,深层(2040cm)则先降低后升高。说明人工梭梭林在种植15a后其土壤养分肥岛效应强于低林龄,而在10a生长旺盛,养分消耗量大,肥岛效应较弱。(3)梭梭各生长指标均与有机质和碱解氮富集率显著相关(p<0.05),其中与有机质极显著相关(p<0.01),说明随着林龄的增加,土壤有机质与碱解氮含量累积较为明显。其中有机质的空间异质性最明显,而速效磷、钾时空异质性较弱。由此也进一步表明了干旱荒漠区人工梭梭与土壤养分间具有明显的时空耦合关系。
英文摘要	In order to clarify the spatial and temporal evolution trend of soil nutrient utilization mechanism of planted Haloxylon am modendronin arid desert areas,the planted Haloxylon am modendron with the plantation ages of 2 years,5 years,10 years,15 year,and 30 years in the southwestern margin of Ulan Buh were selected as the research samples.The spatial distribution and enrichment effects of soil nutrients in different ages of Haloxylon am modendron were analyzed by field investigation and laboratory experiments.The conclusions were drawn as follows.(1)The soil nutrients of the planted sand bogs of different ages demonstrated the significant stratification distribution,the nutrient contents decreased in the order:010 cm>1020 cm>2040 cm,among them,soil organic matter,alkali nitrogen,available phosphorus and available potassium of surface layer were 82.0%,228.2%,172.7%and 39.0%higher than the averages of deep layers,and the accumulation of nutrients in surface soil was more obvious,indicating that most of the nutrients in the topsoil mainly resulted from plants litter material.(2)The soil nutrient content in the horizontal direction showed significant difference in 15~30 years,soil organic matter,alkali nitrogen,available phosphorus and available potassium in roots,shrubs and intercropping increased by 30.8%and 38.0%,196.7%and 15.6%, 22.5%and 8.3%,and 56.4%and 10.6%,respectively.The enrichment rates were significantly higher than other forest ages.The nutrients in surface layers(010 cm,1020 cm)increased with the increase of forest age,while the nutrients in the deep layer(2040 cm)decreased first and then rose.The results showed that the soil'fertile island'of the artificial Haloxylon am modendron was stronger than that of the low forest age,because the nutrient accumulation rate was strong and the nutrient consumption was large in 10 years, the'fertile island'was weak.(3)The growth indexes of Haloxylon am modendron were closely related to the enrichment and distribution of soil organic matter and alkali nitrogen,indicating that soil organic matter and alkali nitrogen content are more heterogeneous in space-time heterogeneity.Spatial and temporal heterogeneity of potassium is weak,which indicates that there is a significant spatial and temporal coupling relationship between planted Haloxylon am modendron and soil nutrients in the arid desert areas.
中文关键词	肥岛效应 ; 人工梭梭 ; 土壤养分富集率 ; 干旱荒漠区
英文关键词	fertile island Haloxylon am modendron enrichment rate arid desert area
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6583359
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/316250
作者单位	1.内蒙古农业大学沙漠治理学院, 呼和浩特, 内蒙古 010018, 中国; 2.鄂尔多斯林业规划设计院, 鄂尔多斯, 内蒙古 017000, 中国; 3.内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国
推荐引用方式 GB/T 7714	陈婧,崔向新,丁延龙,等. 基于肥岛效应探讨人工梭梭土壤养分时空演变趋势[J]. 内蒙古农业大学,2019,26(6):71-79.
APA	陈婧,崔向新,丁延龙,王则宇,刘宗奇,&石涛.(2019).基于肥岛效应探讨人工梭梭土壤养分时空演变趋势.水土保持研究,26(6),71-79.
MLA	陈婧,et al."基于肥岛效应探讨人工梭梭土壤养分时空演变趋势".水土保持研究 26.6(2019):71-79.