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首页> 外文期刊>Environmental Science and Pollution Research >Comparing ammonia volatilization between conventional and slow-release nitrogen fertilizers in paddy fields in the Taihu Lake region
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Comparing ammonia volatilization between conventional and slow-release nitrogen fertilizers in paddy fields in the Taihu Lake region

机译：比较太湖地区稻田常规和缓释氮肥氨挥发的氨挥发

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摘要

Pollution arising from ammonia volatilization in paddy fields could be reduced by using slow-release nitrogen fertilizers. In recent years, slow-release nitrogen fertilizers have been commonly used to replace conventional nitrogen fertilizers in the Taihu Lake region to reduce ammonia volatilization and improve nitrogen-use efficiency. To compare ammonia volatilization losses and examine the effects of different factors (N rates, types, field water NH4+, pH, and rainfall) between conventional nitrogen fertilizer and slow-release nitrogen fertilizer, paddy field experiments were conducted using conventional urea and sulfur-coated urea (SCU) fertilizers. The results indicated that ammonia volatilization flux positively increased with N application rate following an exponent function and depended on field water NH4+ concentration and pH. The ammonia volatilization under SCU treatment was 37.95-70.48 kg/hm(2), accounting for 40.66-52.86% of the fertilizer application rate. Compared with the same N input, the ammonia volatilization loss rate was 11.53-25.33% lower under the SCU treatment. Besides, SCU produced an unfavorable environment for ammonia volatilization, with a 1.15-2.61% decrease in pH and a 40.83-43.58% decrease in field water NH4+ concentration.
机译：通过使用缓慢释放的氮肥可以减少来自稻田中氨挥发的污染。近年来，慢释放氮肥通常用于取代太湖地区的常规氮肥，以减少氨挥发，提高氮气利用效率。为了比较氨挥发损失并检查常规氮肥和缓释氮肥之间的不同因素（n率，类型，田间水NH4 +，pH和降雨）的影响，使用常规尿素和硫涂层进行稻田实验尿素（SCU）肥料。结果表明，在指数函数之后，氨挥发通量随着N施用速率呈正增加，并依赖于现场水NH4 +浓度和pH。 SCU治疗下的氨挥发为37.95-70.48千克/小时（2），占肥料申请率的40.66-52.86％。与同一N输入相比，SCU处理下氨挥发损失率为11.53-25.33％。此外，SCU产生了氨挥发的不利环境，下降1.15-2.61％，野外水NH4 +浓度降低40.83-43.58％。

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