Quantifying soil nitrogen mineralization to improve fertilizer nitrogen management of sugarcane

Otto, Rafael; Mulvaney, R. L.; Khan, Saeed Ahmad; Trivelin, P. C. O.

doi:10.1007/s00374-013-0787-5

Cited by 62 publications

(57 citation statements)

References 70 publications

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“…Increased mineralisation of organic matter would have enhanced soil supplies of plant-available N, and reduced sugarcane responses to N fertilization as previously reported by Otto et al (2013).…”

Section: Discussionmentioning

confidence: 56%

Residual recovery and yield performance of nitrogen fertilizer applied at sugarcane planting

Franco¹,

Otto

Vitti

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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The low effectiveness of nitrogen fertilizer (N) is a substantial concern that threatens global sugarcane production. The aim of the research reported in this paper was to assess the residual effect of N-fertilizer applied at sugarcane planting over four crop seasons in relation to sugarcane crop yield. Toward this end three field experiments were established in the state content at the other, whereas the only residual effect was higher sucrose content in one of the following ratoons. The combined effect was an increase in sugar yield for three of the 11 crop seasons evaluated. Over the crop cycle of a plant cane and three ratoon crops, only 35 % of the applied N was recovered, split 75, 13, 7 and 5 % in the plant cane, first, second and third ratoons, respectively. These findings document the low efficiency of N recovery by sugarcane, which increases the risk that excessive N fertilization will reduce profitability and have an adverse effect on the environment.

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Section: Discussionmentioning

confidence: 56%

Residual recovery and yield performance of nitrogen fertilizer applied at sugarcane planting

Franco¹,

Otto

Vitti

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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“…However, several authors disagree about ISNT ability to predict potentially available organic N (Laboski et al, 2008;Osterhaus et al, 2008) because this method may also extract a constant fraction of total soil N, which might not correspond to the most labile OM-N fraction. In Brazil, Otto et al (2013) considered ISNT a promising index for estimating potential responses to N fertilization in sugarcane cropping areas. An alternative method to ISNT is direct distillation (Bushong et al, 2008;Roberts et al, 2009), which exhibited similar extraction capacity and high correlation coefficients with ISNT (Bushong et al, 2008;Roberts et al, 2009;Otto et al, 2013); in addition, direct distillation does not require the use of Mason Jar, a container not readily available in the Brazilian market and which might limit adoption of the method.…”

Section: Resultsmentioning

confidence: 99%

“…Klapwyk et al (2006), Sharifi et al (2007), and Lawrence et al (2009) obtained satisfactory results with the ISNT method, whereas Laboski et al (2008) and Osterhaus et al (2008) reported unsatisfactory results. In Brazil, Otto et al (2013) compared the ISNT to other methods to estimate potentially mineralizable organic N in areas growing sugarcane and concluded that the ISNT method might improve the N recommendation for the crop.…”

Section: Introductionmentioning

confidence: 99%

Mild and Moderate Extraction Methods to Assess Potentially Available Soil Organic Nitrogen

Braos

Ferreira

Cruz

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:The use of chemical methods to assess the soil organic nitrogen (N) potentially available to plants is not a common practice in Brazil. However, associated with others, this tool might improve efficiency in the use of waste and nitrogen fertilizers. In our study, chemical methods were tested to assess potentially available soil N in samples of 17 representative soils of the western plateau of the state of São Paulo (10 Oxisols and 7 Ultisols). Available soil N was extracted from the collected soil samples using moderate (ISNT-Illinois Soil Nitrogen Test) and mild (hot water and heated solutions of 2 mol L -1 KCl and 0.01 mol L -1 CaCl 2 ) extraction methods. The levels of potentially available N obtained from these chemical methods were correlated with dry matter (DM) and N uptake (N up ) by corn plants grown in pots in a greenhouse experiment carried out with the same 17 soil samples. The ISNT method showed the highest available N extraction capacity, whereas hot water showed the lowest capacity, followed closely by the hot 0.01 mol L -1 CaCl 2 solution. Despite the differences among the quantities of available N ) heated for 16 h can be recommended as the best options for N extraction. considering the possibility for predicting N availability, lower generation of waste, and lower cost of analysis.

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“…For example, a LCA would consider the costs associated with fertilizer inputs. The fertilizer inputs for sorghum were 270 kg N ha À1 , higher than those typically required for sugarcane systems in Brazil (Otto et al, 2013) and Miscanthus and switchgrass systems in the Midwest (Dohleman & Long, 2009;Hickman et al, 2010). Nitrogen fertilizers are energetically costly and lead to higher emissions of nitrogen trace gases such as N 2 O and NO which have implications for climate change and air quality.…”

mentioning

confidence: 99%

Offsetting high water demands with high productivity: Sorghum as a biofuel crop in a high irradiance arid ecosystem

2014

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High irradiance arid environments are promising, yet understudied, areas for biofuel production. We investigated the productivity and environmental trade-offs of growing sorghum (Sorghum bicolor) as a biofuel feedstock in the low deserts of California (CA). Using a 5.3 ha experimental field in the Imperial Valley, CA, we measured aboveground biomass production and net ecosystem exchange of CO 2 ). The BWR of sorghum surpassed that of many C4 biofuel candidate crops in the United States, as well as that of alfalfa which is currently widely grown in the Imperial Valley. Sorghum also outperformed many US biofuel crops in terms of radiation use efficiency (RUE), achieving 1.5 g dry biomass MJ À1. We found no evidence of saturation of NEE at high levels of photosynthetically active radiation (PAR) (up to 2250 lmol m À2 s À1 ). In addition, we found no evidence that NEE was inhibited by either high VPD or air temperature during peak photosynthetic phases. The combination of high productivity, high BWR, and high RUE suggests that sorghum is well adapted to this extreme environment. The biomass production rates and efficiency metrics spanning three growing periods provide fundamental data for future Life Cycle Assessments (LCA), which are needed to assess the sustainability of this sorghum biofuel feedstock system.

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Quantifying soil nitrogen mineralization to improve fertilizer nitrogen management of sugarcane

Cited by 62 publications

References 70 publications

Residual recovery and yield performance of nitrogen fertilizer applied at sugarcane planting

Residual recovery and yield performance of nitrogen fertilizer applied at sugarcane planting

Mild and Moderate Extraction Methods to Assess Potentially Available Soil Organic Nitrogen

Offsetting high water demands with high productivity: Sorghum as a biofuel crop in a high irradiance arid ecosystem

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