Sugarcane trash levels in soil affects the fungi but not bacteria in a short-term field experiment

Rachid, Caio T. C. C.; Pires, Carlos; Leite, D. L.; Coutinho, H. L. da C.; Peixoto, Raquel S.; Rosado, Alexandre Soares; Salton, J. C.; Zanatta, Josiléia Acordi; Mercante, Fábio Martins; Angelini, Guilherme Augusto Robles; Balieiro, Fabiano de Carvalho

doi:10.1016/j.bjm.2016.01.010

Cited by 26 publications

(15 citation statements)

References 29 publications

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“…Rachid et al . () observed that straw removal modified the fungal communities present in soil, but did not affect bacterial communities. However, other studies have shown that microbial communities can be shaped by straw management as well as through the addition of organic or mineral fertilizers (Rachid et al ., ; Navarrete et al ., ; Pitombo et al ., ).…”

Section: Impacts Of Straw Removal On Soil Biological Attributesmentioning

confidence: 97%

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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: Impacts Of Straw Removal On Soil Biological Attributesmentioning

confidence: 97%

“…Recently, there have been efforts to characterize the microbial groups responsible for the soil activities under various management practices in sugarcane cropping areas (Navarrete et al ., ; Pitombo et al ., ; Rachid et al ., ). Rachid et al .…”

Section: Impacts Of Straw Removal On Soil Biological Attributesmentioning

confidence: 97%

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

et al. 2016

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“…Several studies conducted around the world have shown that the maintenance of sugarcane straw promotes increases in microbial biomass (Graham and Haynes, 2006;Souza et al, 2012;Paredes Jr. et al, 2015) and microbial community diversity (Rachid et al, 2013(Rachid et al, , 2016Liao et al, 2014), especially in surface soil layers. In terms of soil macrofauna, despite the land-use change sequence, native vegetation-pasture-sugarcane induces a significant reduction in the diversity of macroinvertebrates , the remaining straw support the soil biota as a food source, improving microclimate conditions and as a shelter in sugarcane areas (Portilho et al, 2011;Benazzi et al, 2013).…”

Section: Iii) Crop Residues Vs Soil Biological Propertiesmentioning

confidence: 99%

Crop residue harvest for bioenergy production and its implications on soil functioning and plant growth: A review

Cherubin

Oliveira

Feigl

et al. 2018

Sci. agric. (Piracicaba, Braz.)

219

122

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ABSTRACT: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 residues can induce deleterious effects on soil functioning, plant growth and other ecosystem services. Here, we have summarized the information available in the literature to identify and discuss the main trade-offs and synergisms involved in crop residue management for bioenergy production. The data consistently showed that crop residue harvest and the consequent lower input of organic matter into the soil led to C storage depletions over time, reducing cycling, supply and availability of soil nutrients, directly affecting the soil biota. Although the biota regulates key functions in the soil, crop residue can also cause proliferation of some important agricultural pests. In addition, crop residues act as physical barriers that protect the soil against raindrop impact and temperature variations. Therefore, intensive crop residue harvest can cause soil structure degradation, leading to soil compaction and increased risks of erosion. With regard to GHG emissions, there is no consensus about the potential impact of management of crop residue harvest. In general, residue harvest decreases CO 2 and N 2 O emissions from the decomposition process, but it has no significant effect on CH 4 emissions. Plant growth responses to soil and microclimate changes due to crop residue harvest are site and crop specific. Adoption of the best management practices can mitigate the adverse impacts of crop residue harvest. Longterm experiments within strategic production regions are essential to understand and monitor the impact of integrated agricultural systems and propose customized solutions for sustainable crop residue management in each region or landscape. Furthermore, private and public investments/cooperations are necessary for a better understanding of the potential environmental, economic and social implications of crop residue use for bioenergy production.

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“…Organic material and nitrogen content were moderately high (Table 1). Analyzed soil satisfied the physicochemical conditions required for sugarcane harvest and showed similar parameters to Brazilian soil sown with this crop (Rachid et al, 2012;Rachid et al, 2016). Therefore, these data could be used as reference in sugarcane production in Mexico.…”

Section: Soil Physico-chemical Characteristicsmentioning

confidence: 60%

Starch- and cellulose-related microbial diversity of soil sown with sugarcane crops in the Papaloapan Basin, a megadiverse region of Mexico

López

Ruiz

Sánchez³

et al. 2018

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Introduction: Sugarcane is an essential agricultural product for bioethanol production in Mexico. The discovery of both the bacterial community associated with this crop and the soil status is a decisive step towards understanding how microorganisms influence crop productivity. Culture enrichment allows for the identification of the biodiversity of biological samples. The objective of this research was to identify the bacterial biodiversity related with two complex carbohydrate sources (starch and cellulose) in soils sown with sugarcane in the Papaloapan Basin in Oaxaca, Mexico via a metagenomic approach. Method: Soil content was analyzed chemically. Liquid LB, LB-starch and LB-1% carboximetilcellulose media were inoculated with 2 g soil and cultured at 180 rpm, 37°C for 48 h. The biomass was collected and the 16S rDNA gene was amplified and a library was constructed which was analyzed by sequencing.Results: N, K and Zn content of organic matter showed higher values than average, as opposed to P and Na, which were lower than average. In the library, 35 OTUs related to Clostridium, Bacillus, Enterococcus, Lysinibacillus and Citrobacter genera were found which could contain genes for breaking cellulose and starch.Discussion or Conclusion: This is the first approach to identify the diversity related to starch and cellulose hydrolysis in the Papaloapan region, where the principal genera detected were Clostridium, Bacillus, Enterococcus, Citrobacter and Lysinibacillus in a soil moderately rich in organic matter.

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Sugarcane trash levels in soil affects the fungi but not bacteria in a short-term field experiment

Cited by 26 publications

References 29 publications

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

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

Crop residue harvest for bioenergy production and its implications on soil functioning and plant growth: A review

Starch- and cellulose-related microbial diversity of soil sown with sugarcane crops in the Papaloapan Basin, a megadiverse region of Mexico

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