水土保持学报2017，Vol.31Issue(6)：52-57,109,7.DOI:10.13870/j.cnki.stbcxb.2017.06.009
模拟降雨下纳米碳对风沙土硝态氮迁移特征的影响
Effect of Nano-carbon on Nitrate Nitrogen Transport in Aeolion Sandy Soil Under Simulated Rainfall
摘要
Abstract
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 10 15 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.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Key words
nano-carbon/simulated rainfall/runoff and sediment yield/nitrate nitrogen transport/effective depth of transport by runoff分类
农业科技引用本文复制引用
陈晓鹏,周蓓蓓,彭遥,胡梓超,王全九..模拟降雨下纳米碳对风沙土硝态氮迁移特征的影响[J].水土保持学报,2017,31(6):52-57,109,7.基金项目
国家自然科学基金项目(51239009 （）
41371239) （）
陕西省科技支撑项目(2013KJXX-38) （2013KJXX-38）
陕西省自然科学基金项目(2015JQ5161) （2015JQ5161）
西安理工大学特色研究计划项目(2016TS013) （2016TS013）
