2019
DOI: 10.1590/1678-992x-2017-0147
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Abstract: Fertilizer recommendations must be improved to optimize N use efficiency (NUE) for bioenergy crops. A study was conducted to test the hypothesis that sites varying in historical usage of by-product differ in soil N-supplying power and sugarcane (Saccharum spp.) responsiveness to N fertilization. Our aim was to quantify soil N availability and N fertilizer rates, sources, and application timings for their effects on sugarcane yield and NUE. Three N response trials, each involving 0 to 200 kg N ha-1 , were condu… Show more

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Cited by 10 publications
(7 citation statements)
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“…Under Australian conditions, for both sugarcane plants and ratoons, the N application rate was the most critical factor influencing NUE 4 . For Brazilian conditions, 22 showed that reducing the N rate from 120 to 80 kg ha –1 of N has limited potential for lowering yields (1%) but increased the NUE (54%), a much higher value than the 14% increase achieved by modifying the N source or timing of application.…”
Section: Introductionmentioning
confidence: 99%
“…Under Australian conditions, for both sugarcane plants and ratoons, the N application rate was the most critical factor influencing NUE 4 . For Brazilian conditions, 22 showed that reducing the N rate from 120 to 80 kg ha –1 of N has limited potential for lowering yields (1%) but increased the NUE (54%), a much higher value than the 14% increase achieved by modifying the N source or timing of application.…”
Section: Introductionmentioning
confidence: 99%
“…This amount of N is probably adequate to supply the amount of N removed from the field (by the stalk) in order to avoid depleting soil N reserves in the long term. A recent study of sugarcane nutritional requirements reported N removal by stalks of 83.8 kg N per 100 Mg −1 of stalks (Otto et al., 2019), yielding a factor of approximately 0.8 kg N Mg −1 of stalks. Taken together, these findings suggest that a rate of 0.8 kg N Mg −1 is reasonable for green sugarcane cultivation in autumn, winter, and spring in south‐central Brazil.…”
Section: Discussionmentioning
confidence: 99%
“…Similarly, Otto et al. (2019) found that reducing N rates from 120 to 80 kg N ha −1 in a Brazilian sugarcane field reduced yield by only 1% but improved NUE by 54%. These findings indicate that choosing an adequate N rate to match crop demand and reduce N losses is a useful strategy to increase sugarcane NUE.…”
Section: Introductionmentioning
confidence: 86%
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“…Kondisi yang demikian menyebabkan bentuk respons produktivitas tebu sama dengan bentuk respons bobot batang. Hasil penelitian Otto et al (2019) memperlihatkan peningkatan dosis N direspons produktivitas tebu dengan membentuk kurva kuadratik tertutup. Adapun hasil penelitian Fortes et al (2013) memperlihatkan peningkatan dosis N direspons produktivitas tebu dengan membentuk kurva linier positif.…”
Section: Pembahasanunclassified