干旱区生态环境知识资源中心(Arid): 科尔沁沙地风蚀作用对土壤碳、氮分布的影响

Arid

	科尔沁沙地风蚀作用对土壤碳、氮分布的影响
其他题名	Impacts of wind erosion on the distribution patterns of soil organic carbon and total nitrogen in Horqin Sandy Land, China
	连杰; 赵学勇; 王少昆; 王新源; 岳祥飞; 韩娟娟; 云建英; 黄文达
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2013
卷号	32 期号:3 页码:529-535
中文摘要	对位于科尔沁沙地奈曼旗中部的沙漠化区域(S区)和舍力虎湖盆(潜在沙漠化区域,P区)表层土壤理化性质、0~100cm土壤有机碳(SOC)、全氮(TN)和土壤各级颗粒密度进行了对比分析;S区内设对照点MS、风蚀发生地TS和颗粒沉降地LS,P区内相应位置设为MC、NC和SC。结果表明:自西北向东南由以中粗沙组分为主的土壤向以粘粉粒和极细沙组分为主的土壤过渡;粘粉粒密度每减少1kg·m~(-2),SOC和TN密度分别下降10和1.1g·m~(-2);0~20cm土壤容重平均值在1.322~1.651g·cm~(-3)变化,表现为TS>MS>LS>NC>SC>MC,粘粉粒含量表现出完全相反的趋势,pH表现为NC>SC>MC>S区;相对各区域的对照点,以风力侵蚀作用为主的TS和SC处SOC和TN含量及密度有不同程度的下降;同样以土壤可蚀性颗粒的沉降堆积作用为主,LS的SOC和TN含量及密度较TS和MS有明显的增加,而NC较SC和MC均大幅减少。S区土壤粘粉粒中的SOC和TN含量远高于P区,但风蚀引起的粘粉粒吹蚀和沙沉积对P区土壤质量的影响程度显著大于S区。区域自然条件下,特定的土地利用方式增大了潜在沙漠化土壤的风蚀风险,风蚀作用的持续效应导致了不同的土壤碳、氮储量变化。
英文摘要	Taking the severely desertified region (S) in central Naiman County and the region with potential desertification (P) in Shelihu Lake basin of Horqin Sandy Land as test objects,a comparative study was made on the topsoil physical and chemical properties and the 0 - 100 cm soil layers organic carbon and total nitrogen contents and particle size fractions. In the regions S and P,three plots were installed,respectively,i. e.,control (MS and MC),wind-eroded (TS and SC),and particulate-deposited (LS and NC). From northwest to southeast,the soil texture in the study area varied from coarse and fine sand to silt and clay and very fine sand. With the density of silt and clay decreased by 1 kg·m~(- 2),the soil organic carbon and total nitrogen contents decreased by 10 and 1. 1 g·m~(- 2),respectively. In 0 - 20 cm soil layer,the bulk density was averagely 1. 322 - 1. 651 g·cm~(- 3) and in the order of TS > MS > LS > NC > SC > MC,silt and clay fraction varied in a reverse order,and pH was in the order of NC > SC > MC > region S. As compared with those in the control plots MS and MC,the soil organic carbon and total nitrogen contents in wind-eroded plots TS and SC decreased to different extent. In the particulatedeposited plots LS and NC,the soil organic carbon and total nitrogen contents had an obvious increase in LS than in TS and MS,but a sharp decrease in NC than in SC and MC. The soil organ-ic carbon and total nitrogen contents in silt and clay fraction were much higher in region S than in region P,but the impact of wind erosion-induced silt and clay loss and particulate deposition on soil quality was more significant in region P than in region S. It was suggested that under the natural conditions of Horqin Sandy Land,inappropriate land use and management could increase the wind erosion risk of potentially desertified soil,and the sustained impact of wind erosion could induce the different changes of soil organic carbon and total nitrogen storage.
中文关键词	风蚀 ; 土壤性质 ; 碳密度 ; 沙沉积 ; 科尔沁沙地
英文关键词	wind erosion soil property carbon density sand deposition Horqin Sandy Land
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:4798341
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230057
作者单位	中国科学院寒区旱区环境与工程研究所奈曼沙漠化研究站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	连杰,赵学勇,王少昆,等. 科尔沁沙地风蚀作用对土壤碳、氮分布的影响[J]. 中国科学院西北生态环境资源研究院,2013,32(3):529-535.
APA	连杰.,赵学勇.,王少昆.,王新源.,岳祥飞.,...&黄文达.(2013).科尔沁沙地风蚀作用对土壤碳、氮分布的影响.生态学杂志,32(3),529-535.
MLA	连杰,et al."科尔沁沙地风蚀作用对土壤碳、氮分布的影响".生态学杂志 32.3(2013):529-535.