干旱区生态环境知识资源中心(Arid): 模拟降雨下纳米碳对风沙土硝态氮迁移特征的影响

Arid

	模拟降雨下纳米碳对风沙土硝态氮迁移特征的影响
其他题名	Effect of Nano-carbon on Nitrate Nitrogen Transport in Aeolion Sandy Soil Under Simulated Rainfall
	陈晓鹏 1; 周蓓蓓 1; 彭遥 1; 胡梓超 1; 王全九 2
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2017
卷号	31 期号:6 页码:52-57,109
中文摘要	通过在神木六道沟流域开展模拟降雨试验,分别在试验小区上、中、下位置条施不同施加量的纳米碳(0.0%,0.1%,0.5%,0.7%和1.0%)研究其对硝态氮随径流、泥沙迁移及在土壤中再分布过程的影响。设计1.0 m*1.0 m降雨小区,前期在土壤表层以下510 cm埋入不同施加量纳米碳,另设不施加纳米碳的小区为参照。采用针孔式人工模拟降雨器进行模拟降雨,降雨强度为90 mm/h,降雨历时为40 min。降雨前后分别采集土壤剖面土样,降雨过程中定时收集径流及泥沙,用以研究纳米碳对于硝态氮迁移过程的影响。结果表明,在土壤中施加纳米碳,可有效减少坡面产流产沙量,且累计径流量、累计产沙量与土壤中纳米碳施加量呈现负相关关系;纳米碳的施加同样可降低径流、泥沙中硝态氮含量,随着纳米碳施加量的增加,径流和泥沙中硝态氮流失量减少,纳米碳施加量为1.0%时,可减少径流中硝态氮流失65.3%,泥沙中硝态氮流失85.7%;土壤剖面硝态氮变化对比表明,施加纳米碳处理中表层硝态氮含量明显低于对照处理,且在1015 cm出现硝态氮含量峰值,均大于对照处理。通过等效径流迁移深度分析硝态氮流失情况,无纳米碳施加处理的EDR最大,随着纳米碳施加量的增加,各处理的EDR依次减小。综上,在黄绵土中施加纳米碳,可有效减少土壤硝态氮的流失量,在黄土区土壤中施加纳米碳并提高施入纳米碳的比例,对于该地区硝态氮流失的治理具有积极作用。
英文摘要	High weathered soils in arid and semi-arid area are characterized by low soil fertility and high erosion potential.This paper evaluated the influences of nano-carbon on nitrate nitrogen transport on the sloping land(15°)of the Chinese Loess Plateau.Simulated rainfall experiments were performed on a natural,fallow loessial slope in the Shenmu Erosion and Environment Research Station,Institute of Soil and Water Conservation,Chinese Academy of Sciences,which locates in the Liudaogou watershed,Shenmu County,Shaanxi Province.Five application rates(i.e.,0.0%,0.1%,0.5%,0.7%,and 1.0%)of nano-carbon were selected under the simulated rainfall experiments(rainfall intensity of 90 mm/h,and rainfall duration of 40 min).A constant-intensity rainfall method was adopted under natural conditions.Field plots were established on the slope that had been fallow for 5 years.The rainfall simulator came from the independent design of Xi’an University of Technology.Under the 90 mm/h rainfall intensity,the simulated rainfall experiments were carried out for 10 times in the 5 different pretreated plots in order to analyze the nitrate nitrogen loss for all the treatments.The main results were as follows:The application of nano-carbon in soil could effectively reduce the runoff and sediment yield,and the cumulative runoff and sediment yield had negative correlation with the amount of carbon applied in the soil.The application of nano-carbon could also reduce the nitrate nitrogen content in runoff and sediment,and the amount of nitrate nitrogen loss in runoff and sediment decreaseed with the increase of nano-carbon content.Compared with the change of nitrate nitrogen in soil profile,the application of nano-carbon could reduce the loss of nitrate nitrogen in the surface layer and increase the nitrate nitrogen content at 1015 cm soil layer.By analyzing the effective depth of transport by runoff,the EDR under the control was max.With the increase of the amount of nano-carbon content,the EDR of each treatment decreased in turn.The results provided a guide for controlling soil water and nutrient loss on the sloping land.
中文关键词	纳米碳 ; 模拟降雨 ; 产流产沙 ; 硝态氮迁移 ; 等效径流迁移深度
英文关键词	nano-carbon simulated rainfall runoff and sediment yield nitrate nitrogen transport effective depth of transport by runoff
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:6136021
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236687
作者单位	1.西安理工大学, 西北旱区生态水利工程国家重点实验室培育基地, 西安, 陕西 710048, 中国; 2.西安理工大学, 西北旱区生态水利工程国家重点实验室培育基地;;黄土高原土壤侵蚀与旱地农业国家重点实验室, 西安, 陕西 710048, 中国
推荐引用方式 GB/T 7714	陈晓鹏,周蓓蓓,彭遥,等. 模拟降雨下纳米碳对风沙土硝态氮迁移特征的影响[J],2017,31(6):52-57,109.
APA	陈晓鹏,周蓓蓓,彭遥,胡梓超,&王全九.(2017).模拟降雨下纳米碳对风沙土硝态氮迁移特征的影响.水土保持学报,31(6),52-57,109.
MLA	陈晓鹏,et al."模拟降雨下纳米碳对风沙土硝态氮迁移特征的影响".水土保持学报 31.6(2017):52-57,109.