Ammonia volatilization from a flooded tropical soil

✍ Scribed by W. B. Ventura; T. Yoshida

• Publisher: Springer
• Year: 1977
• Tongue: English
• Weight: 478 KB
• Volume: 46
• Category: Article
• ISSN: 0032-079X
• DOI: 10.1007/bf00015911

✦ Synopsis

Ammonia volatilization, which follows upon the application of nitrogenous fertilizers to a flooded tropical soil, was directly measured in the greenhouse and in the field. Most of the ammonia volatilization losses occurred during the first 9 days after nitrogen application. Ammonia volatilization increased nlarkedly with increases in soil pH. Nitrogen losses from ammonium sulfate applied to soils whose p H values were below 7.5 were very small. The losses from urea were much greater than those from ammonium sulfate. Mixing the fertilizer materials with the puddled soil reduced the losses. Ammonia losses from flooded soil were larger than from dry soil, and drying of a flooded soil reduced the duration and magnitude of ammonia volatilization. I t is suggested that only a small amount of nitrogen is being lost through ammonia volatilization from many lowlalld rice soils.