Agronomic and environmental implications of sugarcane straw removal: a major review
João Luís Nunes Carvalho,Roberta Corrêa Nogueirol,Lauren Maine Santos Menandro,Ricardo de Oliveira Bordonal,Clovis Daniel Borges,Heitor Cantarella,Henrique Coutinho Junqueira Franco +6 more
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TLDR
In this article, the authors present a synthesis of available information on the magnitude of the main impacts of straw removal from sugarcane fields for bioenergy production and therefore represent 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.Abstract:
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.read more
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Revista Brasileira de Ciência do Solo
TL;DR: In this paper, the authors present a survey of the estimated costs of soil erosion, an issue of fundamental importance in view of the current worldwide discussion on soil erosion. But the authors focus on the cost of soil degradation.
Journal ArticleDOI
Sustainability of sugarcane production in Brazil. A review
Ricardo de Oliveira Bordonal,João Luís Nunes Carvalho,Rattan Lal,Eduardo Barretto de Figueiredo,Bruna Gonçalves de Oliveira,Newton La Scala +5 more
TL;DR: In this article, a comprehensive review of the state-of-the-knowledge and the main advances made thus far in the sugarcane sector is presented, where the authors review the major environmental impacts of rapidly expanding sugarcANE plantations on the land use change and its competition with food production, as well as those associated with sugarcaine cultivation in Brazil.
Journal ArticleDOI
Crop residue harvest for bioenergy production and its implications on soil functioning and plant growth: A review
Maurício Roberto Cherubin,Dener Márcio da Silva Oliveira,Brigitte Josefine Feigl,Laisa Gouveia Pimentel,Izaias Pinheiro Lisboa,Maria Regina Gmach,Letícia L. Varanda,Maristela Calvente Morais,Lucas Santos Satiro,Gustavo Vicentini Popin,Sílvia Rodrigues de Paiva,Arthur Klebson Belarmino dos Santos,Ana Luisa Soares Vasconcelos,Paul L. A. Melo,Carlos Eduardo Pellegrino Cerri,Carlos Clemente Cerri +15 more
TL;DR: The use of crop residues as a bioenergy feedstock is considered a potential strategy to mitigate greenhouse gas (GHG) emissions However, indiscriminate harvesting of crop residue can induce deleterious effects on soil functioning, plant growth and other ecosystem services as discussed by the authors.
Journal ArticleDOI
Agro-ecological functions of crop residues under conservation agriculture. A review
Lalaina Ranaivoson,Krishna Naudin,Krishna Naudin,Aude Ripoche,François Affholder,R. Lilia Rabeharisoa,Marc Corbeels,Marc Corbeels +7 more
TL;DR: In this paper, the relative effects of surface crop residue levels on the performance of a set of agro-ecological functions compared with a no-till bare soil were studied.
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