磺胺类兽药对土壤生化功能及氮素的影响  

Effects of Sulfonamide Veterinary Drugs on Soil Biochemical Function and Nitrogen

作　　者：国彬[1] 姚丽贤[1] 刘忠珍[1] 何兆桓[1] 周昌敏[1] 李国良[1] 杨苞梅[1] 黄连喜[1] 

机构地区：[1]广东省农业科学院土壤肥料研究所,广东省养分资源循环与耕地保育重点实验室,广州510640

出　　处：《土壤》2012年第4期596-600,共5页Soils

基　　金：广东省农科院科技支撑项目(07-支撑-32);广东省农科院院长基金项目(20090106);公益性行业(农业)科研专项(3-26)资助

摘　　要：研究了磺胺类药物对土壤呼吸作用、硝化作用、氨化作用、铵态氮、硝态氮、亚硝态氮及全氮的影响。结果表明,相对较低浓度药物残留(10 mg/kg土)对土壤呼吸作用的影响呈现"激活-抑制"循环的规律,而相对较高浓度药物残留(50 mg/kg土)对土壤呼吸作用的影响则呈现"抑制-激活-抑制"的规律,因此,磺胺类药物残留会抑制土壤呼吸作用。相对较低浓度药物残留(10 mg/kg土)对土壤硝化作用、氨化作用呈现"激活-恢复"的规律,而相对较高浓度药物残留(50 mg/kg土)对土壤硝化作用、氨化作用则一直呈现"激活"的状态,因此,磺胺类药物残留会刺激土壤的硝化作用与氨化作用。土壤氮素是生物圈内氮循环的重要指标,磺胺类药物残留对土壤氮素有一定的抑制作用,若长期保持着较高残留水平,则会破坏土壤的氮循环。The effects ofsultbnamides on soil respiration, nitrification, ammonilication, ammonium, nitrate, nitrite nitrogen and total nitrogen were studied. The results showed that lower concentration of drug residue （10 mg/kg soil） on soil respiratio,1 showed the law of ＇activation - inhibition＇, the higher concentration of drug residue （50 mg/kg soil） on soil respiration showed the law of ＇restraint - activation - inhibition＇, which proved that sulfonamides could inhibit soil respiration. Lower concentration of drug residue （10 mgJkg soil） oll soil nitrification and ammonification showed the law of ＇activation - inhibition~, higher concentration of drug residue （50 mgJkg soil） on soil nitrification and ammonification showed the state of ＇activation＇, which proved that sulfonamides could stimulate soil nitrification and ammonification. Nitrogen is an important indicator of biosphere nitrogen cycle, sulfonamides drug residue on soil nitrogen had some inhibitory effect, and a high residue level of long-term will destroy soil nitrogen cycle

关 键 词：磺胺类药物 土壤呼吸作用 土壤硝化作用 土壤氨化作用 土壤氮素 

分 类 号：X508[环境科学与工程—环境工程]