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
详细信息Effects of different exogenous nitrogen sources on nitrification in limy soil and its kinetic analysis
-
摘要: 为了揭示外源氮源对石灰性土壤硝化作用的影响机理，以钙积半干润均腐土（Cal-Ustic Isohumasols）为材料，采用室内培养方法研究了不同添加量和不同氮源对土壤硝化作用的影响，并建立了对应的硝化模型。结果表明，NH4+-N消耗速率和NO3--N增加速率呈S曲线变化，NH4+-N消耗速率高于NO3--N增加速率。氮素添加量与NH4+-N消耗速率和NO3--N增加速率呈正相关，硝化菌外的因子对NH4+-N和NO3--N的吸收与NH4+-N添加量呈正相关；不同氮素添加量对硝化作用影响程度不同，当氮素添加量为N 75 mg /kg，干土时，硝化作用较彻底。SO42-可加快硝化作用速率，同时也可改变其他因子对NH4+-N和NO3--N的利用。
-
关键词:
- 石灰性土壤 /
- 外源氮源 /
- 硝化作用 /
- Michaelis-menten动力学方程
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 75 mg N/kg soil, the nitrification is more completely. SO42- can hasten the nitrification rate and can also improve the bio-availabilities of ammonium nitrate and nitrogen nitrate for other organisms.-
Keywords:
- limy soil /
- exogenous nitrogen sources /
- nitrification /
- Michaelis-menten kinetics
-
-
期刊类型引用(3)
1. 曾丽丽，江俊松. 油菜临界磷浓度稀释曲线模型的构建和验证. 河南农业科学. 2023(04): 51-59 . 
百度学术
2. 刘环环，刘强，范战胜，张彦聪，王彦霞，王瑞文. 小麦玉米轮作体系玉米氮磷调控技术研究. 农业科技通讯. 2023(09): 64-66+135 . 百度学术
3. 李巧丽，刘朋召，师祖姣，刘苗，陈跻，李慧，王小利，王瑞，李军. 关中平原冬小麦临界磷浓度稀释曲线的构建与磷营养诊断. 植物营养与肥料学报. 2022(11): 2011-2019 . 本站查看
其他类型引用(3)
计量
- 文章访问数: 4212
- HTML全文浏览量: 303
- PDF下载量: 1166
- 被引次数: 6
下载:
