Acúmulo de nutrientes e decomposição do palhiço de cana em função de doses de vinhaça

Andreotti, Marcelo; Soria, José Eduardo; Costa, Nídia Raquel; Gameiro, Roberta de Aquino; Rebonatti, Melina Daniel

doi:10.14393/bj-v31n2a2015-22426

Cited by 7 publications

(6 citation statements)

References 28 publications

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“…On average, sugarcane straw presents N, P, and K nutrient concentrations ranging from 4.4 to 5.4, 0.1 to 0.7, and 2.8 to 10.8 g kg −1 , respectively (Oliveira et al ., , ; Fortes et al ., ; Trivelin et al ., ; Andreotti et al ., ). With regard to lignocellulosic composition, straw contains about 19.0–34.4% lignin, 29–44% cellulose, 27–31% hemicelluloses, in addition to 2.4–7.9% ash (Barros et al ., ; Costa et al ., ; Landell et al ., ; Oliveira et al ., ; Moutta et al ., ; Santos et al ., ; Szczerbowski et al ., ).…”

Section: Assessment Of Sugarcane Straw and Potential Use In Industrymentioning

confidence: 97%

Agronomic and environmental implications of sugarcane straw removal: a major review

et al. 2016

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Large‐scale bioenergy demand has triggered new approaches to straw management in Brazilian sugarcane fields. With the progressive shift from a burned to a nonburned harvest system, most of the straw presently retained on the soil surface has become economically viable feedstock for bioenergy production. The trade‐offs between the need to preserve soil quality and produce more bioenergy have been the subject of intense discussion. This study presents a synthesis of available information on the magnitude of the main impacts of straw removal from sugarcane fields for bioenergy production and therefore represents an easily available resource to guide management decisions on the recommended amount of straw to be maintained on the field to take advantage of the agronomic, environmental, and industrial benefits. Crop residues remaining on sugarcane fields provide numerous ecosystem services including nutrient recycling, soil biodiversity, water storage, carbon accumulation, control of soil erosion, and weed infestation. Furthermore, several studies reported higher sugarcane production under straw retention on the field, while few suggest that straw may jeopardize biomass production in cold regions and under some specific soil conditions. Pest control is among the parameters favored by straw removal, while N2O emissions are increased only if straw is associated with the application of N fertilizer and vinasse. An appropriate recommendation, which is clearly site specific, should be based on a minimum mass of straw on the field to provide those benefits. Overall, this review indicates that most of the agronomic and environmental benefits are achieved when at least 7 Mg ha−1 of dry straw is maintained on the soil surface. However, modeling efforts are of paramount importance to assess the magnitude and rates of straw removal considering the several indicators involved in this complex equation, so that an accurate straw recovery rate could be provided to producers and industry toward greater sustainability.

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Section: Assessment Of Sugarcane Straw and Potential Use In Industrymentioning

confidence: 97%

Agronomic and environmental implications of sugarcane straw removal: a major review

et al. 2016

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“…In this sense, it is important to know the chemical composition of green tops and dry leaves in order to make informed decisions on straw management. The option of retaining straw on the soil surface provides benefits for soil quality, environmental sustainability, and crop yield …”

Section: Introductionmentioning

confidence: 99%

Comprehensive assessment of sugarcane straw: implications for biomass and bioenergy production

Menandro

Cantarella

Franco

et al. 2017

Biofuels Bioprod Bioref

154

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Sugarcane straw, consisting of green tops and dry leaves, can be maintained on fields to improve soil quality, or harvested for bioenergy production. The optimum option between these two uses is still uncertain and requires further study. This study, conducted across three crop cycles, provides an assessment of the moisture, nutrients, ash, extractives, cellulose, hemicelluloses, and lignin contents of four sugarcane varieties across seven regions of south‐central Brazil. Suitability of the straw fractions for nutrient recycling, bioelectricity, and second‐generation ethanol production were also evaluated. Results showed that the sugarcane straw yield (dry mass) was 14.0 Mg ha−1, and the ratio of dry straw/fresh stalk was 12%. The composition of green tops and dry leaves differed consistently across varieties, sites, and crop cycles. Dry leaves represented 60% of the straw, but green tops contained about 70% of the total N, P, and K content. Therefore, green tops recycled up to four times more nutrients than dry leaves. Green tops also had six times higher moisture and greater chlorine content which decreased the mill process efficiency. In turn, dry leaves had higher lignin, cellulose, and hemicelluloses content, greater heating value (higher: 17.3 MJ kg−1; lower: 15.6 MJ kg−1) and tended to be a better second‐generation ethanol production feedstock. Overall, the results show that it is preferable to use dry leaves for bioenergy production while leaving green tops on the field for nutrient recycling. This study pointed out that more efficient methods for separating these fractions in the field need to be developed. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd

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“…The vinasse rates application did not affected the contents of nutrients, except calcium in the soil layer 0.0-0.2 m and potassium in both layers. Andreotti et al (2015) assessed the changes in the soil under vinasse applications of up to 200 m 3 and found similar results, with the main effects related to the large amount of potassium present in the vinasse.…”

Section: Resultsmentioning

confidence: 73%

Phosphogypsum and Vinasse Application: Soil Chemical Properties and Alfalfa Productivity and Nutritional Characteristics

et al. 2017

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-The objective of this work was to evaluate the effects of the application of phosphogypsum and vinasse on soil chemical properties and productivity and nutritional characteristics of alfalfa (Medicago sativa). The experiment was conducted in a randomized block design, using a 3×5 factorial arrangement, with three vinasse rates (0, 150 and 300 m 3 ha -1 ) and five phosphogypsum rates (0, 3, 6, 9 and 12 Mg ha -1 ). The alfalfa chemical composition and shoot dry matter (SDW) and soil chemical properties (in the layers 0.0-0.2 and 0.21-0.4 m) were evaluated. The vinasse rates increased the soil potassium contents, while the phosphogypsum rates promoted linear increases in soil calcium and sulfur contents. The base saturation was increased and the magnesium content showed a quadratic response on the layer 0.21-0.4 m with the increase in phosphogypsum rates. The calcium, magnesium and phosphorus contents in the alfalfa leaves were lower with vinasse application. The phosphogypsum rates promoted linear increases in alfalfa SDW. Vinasse rated 150 m 3 ha -1 was been enough to SDW increase. Calcium and magnesium contents in the leaves fitted a quadratic model, with maximum calcium content in the phosphogypsum rate of 9.5 Mg ha -1 and the minimum magnesium content in the phosphogypsum rate of 8.7 Mg ha -1 . The leaf sulfur contents in all vinasse rates and leaf potassium contents in the highest vinasse rate showed maximum accumulation at near 9 Mg ha -1 of phosphogypsum.Keywords: Medicago sativa. Calcium. Magnesium. Potassium. Sulfur. APLICAÇÃO DE GESSO E VINHAÇA: ATRIBUTOS QUÍMICOS DO SOLO, PRODUTIVIDADE EESTADO NUTRICIONAL DA ALFAFA RESUMO -O objetivo do trabalho foi avaliar os efeitos da aplicação de gesso e vinhaça na produção de matéria seca, nutrição e atributos químicos do solo cultivado com alfafa. O experimento foi realizado em delineamento experimental de blocos ao acaso, em esquema fatorial 3 × 5, com três doses de vinhaça, 0, 150 e 300 m 3 ha -1 e cinco doses de gesso agrícola (0, 3, 6, 9 e 12 Mg ha -1). Foram avaliados a composição química e matéria seca da parte aérea (MSPA) e os atributos químicos do solo (0-0,2 e 0,21-0,4 m). As doses de vinhaça aumentaram os teores de potássio, enquanto as doses de gesso promoveram acréscimos lineares nos teores de cálcio e enxofre no solo. A saturação de bases foi crescente e o magnésio teve efeito quadrático na camada de 0,21-0,4 m em função das doses de gesso. Os teores de cálcio, magnésio e fósforo na folha da alfafa foram menores com a aplicação de vinhaça. As doses de gesso promoveram acréscimos lineares na MSPA da alfafa. A dose de 150 m 3 ha -1 já foi suficiente para aumentar a MSPA. Os teores de cálcio e magnésio na folha tiveram ajuste quadrático, com máximo acúmulo de cálcio em 9,5 Mg ha -1 e o magnésio com ponto de mínimo na dose de 8,7 Mg ha -1 de gesso. Os teores foliares de enxofre sob doses de vinhaça e os de potássio na maior dose obtiveram máximo acumulo na presença de 9 Mg ha -1 de gesso. Palavras-chave:Medicago sativa. Cálcio. Magnésio. Potass...

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Acúmulo de nutrientes e decomposição do palhiço de cana em função de doses de vinhaça

Cited by 7 publications

References 28 publications

Agronomic and environmental implications of sugarcane straw removal: a major review

Agronomic and environmental implications of sugarcane straw removal: a major review

Comprehensive assessment of sugarcane straw: implications for biomass and bioenergy production

Phosphogypsum and Vinasse Application: Soil Chemical Properties and Alfalfa Productivity and Nutritional Characteristics

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