江汉平原集约农区水体氮通量分析  

Analysis of Water Nitrogen Fluxes of Intensive Agricultural Field in Jianghan Plain

作　　者：田月明[1,2] 卢碧林[1] 郑林章 

机构地区：[1]长江大学农学院,湖北荆州434025 [2]桂林理工大学环境科学与工程学院,广西桂林541004 [3]湖北省石首市农业局,湖北石首434400

出　　处：《湖北农业科学》2013年第19期4611-4614,4618,共5页Hubei Agricultural Sciences

基　　金：湖北省自然科学基金项目(2011CDB004);国家公益性行业(农业)科研专项(201203032)

摘　　要：2009年在江汉平原典型集约农区——荆州市岑河镇庙兴村进行了为期1年的外场试验。通过对区域内水样进行氮素含量分析,定量估计了该区域地表水氮输入量及氮沉降量,并探求其氮通量变化。结果表明,该区域地表水及雨水氮素含量变化与雨季、农业生产施肥有一定时间同步性。地表水氮通量降雨时变化幅度较大,水体氮素输入量分别为总氮86.92 kg/hm2,氨氮21.03 kg/hm2,硝酸盐氮27.19 kg/hm2,亚硝酸盐氮1.93 kg/hm2;多雨期氮沉降通量变化幅度较大,氮沉降量分别为总氮17.17 kg/hm2,氨氮8.09 kg/hm2,硝酸盐氮6.99 kg/hm2,分别占该区域水体相应氮素输入量的19.8%、38.5%、25.7%。The water nitrogen fluxes of a typical intensive agricultural field in Jianghan plain,Miaoxing village,Cenhe town of Jingzhou city,were studied in 2009.The nitrogen contents in regional surface water and the nitrogen deposition fluxes were estimated to investigate the changes of the nitrogen fluxes.Results showed that the nitrogen contents in regional surface water and rainwater changed with the agricultural production fertilization and the rainy season.The nitrogen fluxes in surface water increased with rainfall,the nitrogen input in water was 86.92 kg/hm2 of TN,21.03 kg/hm2 of NH3-N,27.19 kg/hm2 of NO3--N,1.93 kg/hm2 of NO2--N.The nitrogen deposition fluxes varied greatly in rainy period,and the fluxes of different forms of nitrogen deposition were 17.17 kg/hm2 of TN,8.09 kg/hm2 of NH3-N,6.99 kg/hm2 of NO3--N,accounting for 19.8％,38.5％,and 25.7％ of the regional water total nitrogen input,respectively.

关 键 词：江汉平原 集约农区 水体 氮通量分析 

分 类 号：X502[环境科学与工程—环境工程]