不同浓度亚硝态氮在弱碱性土壤中的转化规律研究  

Study on the nitrogenous transformation in weak alkaline soil amended with different rates of nitrite

作　　者：窦妍[1] 卢楷彬 邓培杰 张风义 张修禹 罗文 DOU Yan;LU Kai-bin;DENG Pei-jie;ZHANG Feng-yi;ZHANG Xiu-yu;LUO Wen(School of Environmental Science and Engineering,Chang’an University,Xi’an 710054,China)

机构地区：[1]长安大学环境科学与工程学院

出　　处：《应用化工》2019年第8期1830-1832,1836,共4页Applied Chemical Industry

基　　金：陕西省自然科学基金项目支持(2018JQ4042)

摘　　要：选取陕西省华县耕作土壤,在实验室条件下研究该弱碱性土壤在不同初始浓度的亚硝态氮(11.2,56,112,280,560mg/kg土)存在下的氮的转化规律,并进一步阐明亚硝态氮在该土壤中的累积效应。结果表明,土壤中的亚硝态氮的累积效应随着浓度的增大不断增强,即土壤中亚硝态氮转化为硝态氮的转化时间随着亚硝态氮的初始浓度的增加而增加。但是,高浓度的亚硝态氮(560mg/kg)向硝态氮转化过程中,从第10d开始,亚硝态氮的转化速率明显下降,低于初始浓度为280mg/kg时的状态,反应受到强烈的抑制作用;当调整土壤的初始pH值时,该浓度下的抑制作用也几乎不被影响。因此,对出现高浓度亚硝态氮的地区环境需要引起重视,并及时采取一定的措施,以防止其对人类健康产生进一步的影响。The soil was collected from Hua county,Shaanxi province.In laboratory,the transformation rule of nitrogen was studied in the weakly alkaline soil amended with different initial concentrations of nitrogenous nitrogen(11.2,56,112,280,560 mg/kg soil),and the cumulative effect of nitrogenous nitrogen was discussed.The results showed that the cumulative effect of nitrite nitrogen in soil increased with the increase of concentration,that is the conversion time to NO3^--N increased with the increase of the initial concentration of NO2^--N.In the process of conversion from high concentration of NO2^--N(560 mg/kg)to NO3^--N,from the 10th day on,the conversion rate of NO2^--N decreased significantly,which was lower than the state when the initial concentration was 280 mg/kg,and the reaction was strongly inhibited;When the initial pH value of the soil was adjusted,the inhibitory effect at this concentration was hardly affected.Therefore,it is necessary to pay attention to the regional environment with high concentration of nitrite nitrogen,and take some measures in time to prevent its further impact on human health.

关 键 词：亚硝态氮 硝态氮 累积效应 弱碱性土壤 

分 类 号：TQ441[化学工程—化学肥料工业]