Synergistic Effect of Influence Factors on Ammonia Volatilization in Fertilizer Solution: A Laboratory Experiment

被引：0
|
作者：
Xie, Jie [1 ,2 ]
Chen, Yuanhua [1 ,2 ]
Yang, Tao [1 ,2 ]
Li, Jianguo [1 ,2 ]
Xu, Changxu [1 ,2 ]
Dong, Aiqin [1 ,2 ]
机构：
[1] Soil Fertilizer & Environmental and Resources Institute, Jiangxi Academy of Agricultural Sciences, Nanchang,330200, China
[2] Jinggangshan Institute of Red Soil, Ji’an,343016, China
来源：
Applied Sciences (Switzerland) | 2024年 / 14卷 / 22期
关键词：
Ammonia volatilization; which is one of the main ways that nitrogen gas is released from farmland; restricts promotion of the utilization of nitrogen fertilizer and contains some potential environmental risks. To investigate the general pattern of ammonia volatilization under actual paddy field conditions; we designed an indoor simulated system to measure the amount of ammonia volatilized within a single time period by controlling the pH and concentration of NH4+ (c(NH4+)) in the solution; the gas–liquid interfacial gas velocity; and the ambient temperature. In this paper; the influence of these factors; the synergistic effect on ammonia volatilization; and their quantitative relationship are discussed. We used solutions of ammonium bicarbonate (SAB) and diammonium phosphate (SDP) for the simulation experiments; and the results showed that there is a significant linear relationship between the amount of ammonia volatilization and c(NH4+). The correlation coefficients were between 0.9214 to 0.9897 and 0.8932 to 0.9904 for SAB and SDP; respectively. The quantitative relationship between temperature and pH and the influence factor (CIF) and the initial ammonia volatilization fluxes (IAVFs) was analyzed by the least-squares method; and the degrees of polynomial were one and two; respectively. The regression equations of the SAB and SDP among the amount of ammonia volatilization with the concentration of ammonium nitrogen; the temperature; and the pH were calculated by using MATLAB. Considering the effects of temperature and pH on the CIF and IAVFs under individual conditions; we used a binary cubic model to fit the relationship between temperature and pH to the CIF and IAVFs. The simulation results showed that the correlation coefficients between the CIF and IAVFs for SAB were 0.9980 and 0.9680; respectively; and the correlation coefficients were 0.9946 and 0.9708 for SDP; respectively. The quantitative equation took into account the coefficient of determination and degrees of polynomial; and the ammonia volatilization fluxes can be calculated by using these equations. © 2024 by the authors;
D O I：
10.3390/app142210330
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