Mitigation of ammonia volatilisation from urea with micronised sulfur applied to common bean

• Autor(a) principal: Costa Crusciol, Carlos Alexandre [UNESP]
• Data de Publicação: 2019
• Outros Autores: Almeida, Danilo Silva [UNESP], Alves, Cleiton Jose [UNESP], Soratto, Rogerio Peres [UNESP], Krebsky, Evelin Oliveira [UNESP], Spolidorio, Eduardo Scarpari [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1071/SR18232; http://hdl.handle.net/11449/185793
• topic: alternative sulfur source; nitrogen sources; no-till; nutrient uptake; soil texture

Urea with micronised sulfur (S) in granules may result in lower nitrogen (N) depletion through ammoniacal N (NH3-N) loss than conventional urea due to the acidification reaction of S near urea granules in soil, and the addition of S to the urea may provide a limiting nutrient in tropical soils. The research objectives were to (1) verify whether urea containing micronised S (urea+S) can mitigate NH3-N volatilisation in comparison to conventional urea, ammonium nitrate, and ammonium sulfate; and (2) evaluate the efficiency of N and S sources for common bean (Phaseolus vulgaris L.) grown on coarse-, medium-, and fine-textured soil. The results showed that 90% of NH3-N volatilisation occurred during the first 14 days after application. The blend of elemental sulfur and sulfate in urea reduces the loss of N by NH3-N volatilisation compared with regular urea but not enough to achieve the low volatilisation as observed for ammonium nitrate and ammonium sulfate application. Despite the differences in the leaf N and S concentration and bean yield components, no differences were observed among N sources in grain yield in general.