氮掺杂碳纳米粒子对红壤中氮损失及盐基离子的影响  

Effect of adding nitrogen-doped carbon nanoparticles(N-CNPs) on soil nitrogen loss and base irons in red soil

作　　者：胡伟[1] 向建华[1] 向言词[1] 周练[1] 陈燕[1] 

机构地区：[1]湖南科技大学生命科学学院,湖南湘潭411201

出　　处：《农业环境科学学报》2017年第1期143-149,共7页Journal of Agro-Environment Science

基　　金：国家自然科学基金青年科学基金项目(31401943)~~

摘　　要：采用室内模拟装置淋溶土柱的方法,研究了氮掺杂碳纳米粒子(N-CNPs)配施尿素对红壤中尿素氮损失和土壤盐基离子的影响。结果表明:N-CNPs伴随尿素施入红壤后,在p H4.38的模拟酸雨多次淋溶条件下,能显著降低红壤氮素损失率;氮素损失率与N-CNPs的施用量呈正相关,15‰N-CNPs配施尿素处理总氮损失率仅为单施尿素处理的49.45%;5‰N-CNPs用量所表现出的氮素损失率与5%双氰胺(DCD)处理结果相近。N-CNPs施用后,土壤交换性阳离子淋失量降低,具体表现为Ca2+>Mg2+>Na+>K+,p H值和盐基饱和度(BS)升高,且与N-CNPs用量呈显著正相关(P<0.05)。这些结果表明,土壤p H值和BS的改善可能是N-CNPs施用于红壤后引起土壤氮素淋失降低的原因之一。Indoor simulated leaching approach of soil column was used to study effects of nitrogen-doped carbon nanoparticles（N-CNPs）with urea on nitrogen loss and base irons from red soils. The results showed that the rate of nitrogen loss decreased with the increased of NCNPs after the red soils were leached with simulated acid rain 4.38 in p H, and the nitrogen loss rate under 15‰ N-CNPs treatment was only49.45 percent of the urea treatment. After leaching, the rate of nitrogen loss was no significant different between 5‰ N-CNPs treatment and5% DCD treatment. As applying N-CNPs, the amount of exchangeable bases in leaching water was lower than that in the CK1 treatment, the content was characterized by Ca2 ＋〉Mg2 ＋〉Na〉＋K＋, the base saturation and the soil p H were decreased, and there was a positive correlation between base saturation and the application content of N-CNPs. The result of correlation analysis showed that the applying of N-CNPs was the main reason which reducing nitrogen loss by improving of the base saturation and the soil p H value.

关 键 词：氮掺杂碳纳米粒子 红壤 氮素损失 盐基饱和度 

分 类 号：X53[环境科学与工程—环境工程]