Abstract
The excessive use of nitrogen (N) in sugarcane (Saccharum officinarum L.) is a source of contamination for aquifers. The objective was to evaluate sugarcane yield, as well as profitability and amount of N leached resulting from the application of different split N doses. Three N doses (250, 200 and 150 kg ha-1) and three different application numbers (2, 3 and 4) were evaluated using a factorial design in randomized blocks. When the N dose was divided in three and four applications yields higher than 125 ton ha-1 were obtained. The greatest benefit-cost-ratio (1.8) resulted from using 150 kg ha-1 of N divided in three applications. The lowest N losses due to leaching were obtained using 150 kg ha-1 of N divided in three (16.8 kg ha-1) and four (15.4 kg ha-1) applications. Low N doses divided in three or four applications did not reduce sugarcane production; furthermore, it was more profitable and had a lower environmental impact by reducing N leaching.
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Claims 6
Claim · model-written summary
Three or four nitrogen applications gave sugarcane yields above 125 ton ha-1.
- Treatment
- N dose was divided in three and four applicationse0
- Outcome
- yieldse0
- Direction
- highere0
- Value
- 125 ton ha-1e0
Not reportedTaxonComparator
Verbatim
e0“When the N dose was divided in three and four applications yields higher than 125 ton ha-1 were obtained”
Claim · model-written summary
A 150 kg ha-1 nitrogen dose split into three applications gave the highest benefit to cost ratio of 1.8.
- Treatment
- 150 kg ha-1 of N divided in three applicationse0
- Outcome
- benefit-cost-ratioe0
- Direction
- greateste0
- Value
- 1.8e0
Not reportedTaxon
Verbatim
e0“The greatest benefit-cost-ratio (1.8) resulted from using 150 kg ha-1 of N divided in three applications”
Claim · model-written summary
A 150 kg ha-1 nitrogen dose split into three applications gave a low leaching loss of 16.8 kg ha-1.
- Treatment
- 150 kg ha-1 of N divided in threee0
- Outcome
- N losses due to leachinge0
- Direction
- loweste0
- Value
- 16.8 kg ha-1e0
Not reportedTaxonComparator
Verbatim
e0“The lowest N losses due to leaching were obtained using 150 kg ha-1 of N divided in three (16.8 kg ha-1) and four (15.4 kg ha-1) applications”
Claim · model-written summary
A 150 kg ha-1 nitrogen dose split into four applications gave a low leaching loss of 15.4 kg ha-1.
Not reportedTaxonComparator
Verbatim
e0“The lowest N losses due to leaching were obtained using 150 kg ha-1 of N divided in three (16.8 kg ha-1) and four (15.4 kg ha-1) applications”
Claim · model-written summary
Low nitrogen doses in three or four applications did not reduce sugarcane production.
- Taxon
- sugarcanee0
- Treatment
- Low N doses divided in three or four applicationse0
- Outcome
- sugarcane productione0
- Direction
- did not reducee0
Not reportedComparator
Verbatim
e0“Low N doses divided in three or four applications did not reduce sugarcane production”
Claim · model-written summary
The authors conclude that lower nitrogen doses split three or four ways improve profitability and reduce leaching impact.
- Outcome
- more profitable and had a lower environmental impacte0
Not reportedTaxon
Verbatim
e0“it was more profitable and had a lower environmental impact by reducing N leaching”
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nitrogen · yield · Saccharum officinarum (sugarcane)Results differ
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