植物营养与肥料学报2011，Vol.17Issue(5)：1147-1155,9.
不同外源氮对石灰性土壤硝化作用的影响及其动力学分析
Effects of different exogenous in limy soil and nitrogen sources on nitrification its kinetic analysis
摘要
Abstract
In order to understand the mechanism of nitrification in limy soil for different exogenous nitrogen sources, the study was conducted to investigate the effects of different additive amounts and nitrogen sources on the nitrification in fresh Cal-Ustic Isohumasols by using the plot experiment, and the corresponding model was obtained. The results show that the curve between the ammonium nitrate consumption rate and nitrogen nitrate increasing rate can be described as an S shape, and the ammonium nitrate consumption rate is higher than the nitrogen nitrate increasing rate. The ammonium nitrate consumption rate and nitrogen nitrate increasing rate are positively correlated with the nitrogen addition. Except the nitrifying bacteria, other organisms＇ absorptions of ammonium nitrate and nitrogen nitrate are positively related to the addition of nitrogen nitrate. Applications of different nitrogen amounts have great influences on the nitrification in soils. When the nitrogen addition is N 75 mg/kg soil, the nitrification is more completely. SO24- can hasten the nitrification rate and can also improve the bio-availabilities of ammonium nitrate and nitrogen nitrate for other organisms.关键词
石灰性土壤/外源氮源/硝化作用/Michaefis—meflten动力学方程Key words
limy soil/exogenous nitrogen sources/nitrification/Michaelis-menten kinetics分类
农业科技引用本文复制引用
张国桢,黄占斌,李世清,邓振义,张清杉..不同外源氮对石灰性土壤硝化作用的影响及其动力学分析[J].植物营养与肥料学报,2011,17(5):1147-1155,9.基金项目
国家自然科学基金 （）
黄土高原土壤侵蚀与旱地农业国家重点试验室基金 （）
国家十二五“863”课题（2011AA1200503）资助. （）
