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| Nascimento,Carlos Antonio Costa do; Vitti,Godofredo Cesar; Faria,Letícia de Abreu; Luz,Pedro Henrique Cerqueira; Mendes,Fernanda Latanze. |
| 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, sulfur-coated 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Elemental sulfur; Boric acid; Copper sulfate; Sugarcane; Harvest without burning. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400022 |
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| Faria,Letícia de Abreu; Nascimento,Carlos Antonio Costa do; Ventura,Barbara Paquier; Florim,Gabriela Perissinotto; Luz,Pedro Henrique de Cerqueira; Vitti,Godofredo Cesar. |
| Hygroscopic fertilizers tend to absorb moisture from the air and may have undesirable characteristics such as moistness, clumping and lower fluidity, hampering the application. The increasing use of urea is due to its numerous advantages, although this nitrogen (N) source is highly susceptible to volatilization losses, particularly when applied to the soil surface of management systems with conservation of crop residues. The volatilization losses can be minimized by slow or controlled-release fertilizers, with controlled water solubility of the urea-coating materials; and by stabilized fertilizers, which prolong the period during which N remains in the amide or ammonia forms by urease inhibitors. This study evaluated the hygroscopicity of and ammonia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Boric acid; Sulfur; Crop residues; Copper sulphate. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300026 |
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| Faria,Letícia de Abreu; Nascimento,Carlos Antonio Costa do; Vitti,Godofredo Cesar; Luz,Pedro Henrique de Cerqueira; Guedes,Elaine Maria Silva. |
| In Brazilian agriculture, urea is the most commonly used nitrogen (N) source, in spite of having the disadvantage of losing considerable amounts of N by ammonia-N volatilization. The objectives of this study were to evaluate: N lossby ammonia volatilization from: [urea coated with copper sulfate and boric acid], [urea coated with zeolite], [urea+ammonium sulfate], [urea coated with copper sulfate and boric acid+ammonium sulfate], [common urea] and [ammonium nitrate]; and the effect of these N source son the maize yield in terms of amount and quality. The treatments were applied to the surface of a soil under no-tillage maize, in two growing seasons. The first season (2009/2010) was after a maize crop (maize straw left on the soil surface) and the second... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Boric acid; Copper sulfate; Coated urea; Volatilization; Zeolite. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400014 |
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