Effects of Nitrification Inhibitors on Soil Nitrification and Ammonia Volatilization in Three Soils with Different pH

Agronomy

Yuchao Song¹  Yan Xue¹  Dongpo Li¹  Lili Zhang¹  Furong Xiao¹  Lei Cui¹  Zhijie Wu¹  Yongkun Cui²  Jinming Zhang²  Ye Zheng²  Yonghua Li³ 

[1]Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China

[2]Jinxi Natural Gas Chemical Co., Ltd., Huludao 125001, China

[3]North Huajin Chemical Industries Group Corporation, Panjin 124021, China

关键词: ammonium nitrogen;    nitrate nitrogen;    nitrification inhibitor;    nitrification;    ammonia volatilization;   

DOI  :  10.3390/agronomy11081674

来源: DOAJ

【 摘 要 】

The application of nitrification inhibitors (NIs) is considered to be an efficient way to delay nitrification, but the effect of NIs combinations on soil nitrification and ammonia (NH₃) volatilization are not clear in soils with different pH values. In this study, we explored the effect of nitrapyrin (CP) and its combinations with 3, 4-dimethylepyrazole phosphate (DMPP), dicyandiamide (DCD) on the transformation of nitrogen, potential nitrification rate (PNR), and ammonia (NH₃) volatilization in a 120-day incubation experiment with three different pH values of black soil. Treatments included no fertilizer (Control), ammonium sulfate (AS), AS+CP (CP), AS+CP+DMPP (CP+DMPP), and AS+CP+DCD (CP+DCD). The application of NIs significantly decreased NO₃⁻-N contents and potential nitrification rate (p < 0.05), while significantly increased NH₄⁺-N contents (p < 0.05), especially CP+DCD and CP+DMPP were the most effective in the neutral and alkaline soils, respectively. In the acid soil, CP significantly increased total NH₃ volatilization by 31%, while CP+DCD significantly reduced by 28% compared with AS. However, no significant difference was found in NH₃ volatilization with and without NIs treatments (p > 0.05) in the neutral and alkaline soils. In conclusion, the combined nitrification inhibitors had the better efficiency in all three tested soils. CP+DCD and CP+DMPP are the most effective in inhibiting soil nitrification in the clay soils with higher pH value and lower organic matter, while CP+DCD had the potential in mitigating environment pollution by reducing N loss of NH₃ volatilization in the loam soil with lower pH value and higher organic matter. It provided a theoretical basis for the application of high efficiency fertilizer in different soils. Further studies under field conditions are required to assess the effects of these nitrification inhibitors.

【 授权许可】

Unknown