AMMONIA VOLATILIZATION FROM COATED UREA FORMS

作者：Costa do Nascimento Carlos Antonio y; Vitti Godofredo Cesar; Faria Leticia de Abreu; Cerqueira Luz Pedro Henrique; Mendes Fernanda Latanze

来源：Revista Brasileira de Ciencia do Solo, 2013, 37(4): 1057-1063.

• elemental sulfur
• boric acid
• copper sulfate
• sugarcane
• harvest without burning

Nitrogen fertilization is a major component of the cost of agricultural production, due to the high cost and low efficiency of fertilizers. In the case of urea, the low efficiency is mainly due to losses by volatilization, which are more pronounced in cultivation systems in which plant residues are left on the soil. The objective of this work was to compare the influence of urea coated with sulfur or boric acid and copper sulfate with conventional N fertilizers on N volatilization losses in sugar cane harvested after stubble burning. The sources urea, sulfurcoated urea, urea coated with boric acid and copper sulfate, as well as nitrate and ammonium sulfate, were tested at amounts containing N rates of 120 kg ha(-1) N. The integration of new technologies in urea fertilization can reduce N losses by volatilization. These losses were most reduced when using nitrate and ammonium sulfate. The application of a readily acidified substance (boric acid) to urea was more efficient in reducing volatilization losses and nutrient removal by sugar cane than that of a substance with gradual acidification (elemental sulfur).

• 出版日期2013-8