不同氮肥施用对双季稻稻田氨挥发及其动力学特性的影响  

Effects of Different Nitrogen Fertilizers on Ammonia Volatilization and Its Dynamic Characteristics of Double Cropping Rice

作　　者：周亮[1] 荣湘民[1] 谢桂先[1] 王心星[1] 谢勇[1] 宁琪[1] 

机构地区：[1]湖南农业大学资源环境学院,土壤肥料资源高效利用国家工程实验室,农田污染控制与农业资源利用湖南省重点实验室,植物营养湖南省普通高等学校重点实验室,长沙410128

出　　处：《水土保持学报》2014年第4期143-147,共5页Journal of Soil and Water Conservation

基　　金：国家科技支撑计划课题(2012BAD15B04);省教育厅平台项目(11K034)

摘　　要：通过田间小区试验,研究不同氮肥处理对双季稻稻田氨挥发及其动力学特性的影响。结果表明：增施氮肥处理与不施氮肥处理比较,增施氮肥促进双季稻稻田氨挥发,且早稻中普通尿素处理、等氮量控释氮肥处理均达显著差异水平,晚稻中除控释氮肥减氮30%处理外均差异显著;控释氮肥处理与普通尿素处理比较,控释氮肥处理双季稻氨挥发通量峰值低于普通尿素处理,且氨挥发损失量早稻控释氮肥处理比普通尿素处理低42.98%∽54.26%,晚稻降低27.84%∽35.27%;不同用量控释氮肥间比较,双季稻稻田氨挥发量随氮肥用量的增加而增加。动力学特性方面,与E1ovich方程相比抛物线扩散方程对稻田氨挥发累积量随时间变化的拟合效果更好。Field plot experiment was conducted to study the effects of different nitrogen fertilizers on ammonia volatilization and its dynamic characteristics of double cropping rice. Results showed that compared with control treatment, the total amount of ammonia volatilization increased by supplied nitrogen fertilizer, even the common urea treatment and controlled release nitrogen fertilizer were of significant difference in early rice. All other treatments except reducing nitrogen 30% were significantly different in late season. Comparison between different dosage of controlled release nitrogen fertilizer, ammonia volatilization increased with the increasing of fertilizer application. Controlled release nitrogen fertilizer（CRNF） could reduce the peak of ammonia volatilization and total ammonia volatilization compared to the common urea, total ammonia volatilization reduced by 42.98%--54.26% in early rice and reduced by 27.84%--35.27% in late rice. The dynamic characteristics of ammonia volatilization was more quantitatively described as parabola equation than that of Elovich equation.

关 键 词：氮肥 双季稻 氨挥发 动力学特性 

分 类 号：S143.1[农业科学—肥料学] S511[农业科学—农业基础科学]