Efeito do preparo do solo e resíduo da colheita de cana-de-açúcar sobre a emissão de CO2

Moitinho, Mara Regina; Padovan, Milton Parron; Panosso, Alan Rodrigo; Scala, Newton La

doi:10.1590/s0100-06832013000600028

Cited by 32 publications

(20 citation statements)

References 30 publications

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“…Similarly, Moitinho et al . () and De Figueiredo et al . () reported that total removal of straw resulted in additional emissions of 33–37 kg CO 2 ha −1 day −1 , respectively.…”

Section: Impacts Of Straw Removal On Soil Greenhouse Gas Emissionsmentioning

confidence: 85%

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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“…Similarly, Moitinho et al . () and De Figueiredo et al . () reported that total removal of straw resulted in additional emissions of 33–37 kg CO 2 ha −1 day −1 , respectively.…”

Section: Impacts Of Straw Removal On Soil Greenhouse Gas Emissionsmentioning

confidence: 85%

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

et al. 2016

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“…Em geral, a temperatura do solo apresenta relação direta com FCO 2 uma *N = 120, **N = 90, CV -Coeficiente de variação; Médias seguidas da mesma letra não diferem entre si pelo teste de Tukey (p < 0,05) Tabela 1. Estatística descritiva da emissão de CO 2 , temperatura e umidade do solo, nos sistemas de preparo do solo: convencional (PC), subsolagem convencional (SC) e subsolagem localizada (SL) vez que, dependendo do sistema de preparo, a exemplo do PC, com a incorporação dos resíduos ao solo, aumenta-se a taxa de emissão de CO 2 do solo, em virtude da maior área de contato do solo com os resíduos, somada à maior aeração, ao aumento na temperatura do solo (Licht & Al-Kaisi, 2005;Silva-Olaya et al, 2013) e à diminuição da umidade (Schwartz et al, 2010;Moitinho et al, 2013), decorrentes do processo de revolvimento. Em contrapartida, Verbug et al (2005) relatam que o fluxo de CO 2 do solo apresenta relação inversa com a temperatura do solo quando esta excede os 20 ºC.…”

Section: Resultsunclassified

“…As emissões oriundas do solo, associadas à perda de carbono do solo via emissão de CO 2 em áreas agrícolas, frequentemente não são consideradas devido à sua grande variação no tempo (Schwendenmann et al, 2003;Epron et al, 2006) e no espaço (Teixeira et al, 2012) e por ser um fenômeno resultante de uma interação complexa das propriedades físicas, químicas, biológicas e climáticas (Epron et al, 2006;Kasper et al 2009;Lal, 2009;Ussiri & Lal, 2009;Moitinho et al, 2013;Silva-Olaya et al, 2013).…”

Section: Introductionunclassified

Preparo do solo e emissão de CO2, temperatura e umidade do solo em área canavieira

Iamaguti

Moitinho

Teixeira

et al. 2015

Rev. bras. eng. agríc. ambient.

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R E S U M OO preparo mecânico do solo é uma das práticas agrícolas que contribuem para o aumento da perda de carbono via emissão de CO 2 do solo (FCO 2 ). Com este trabalho objetivou-se investigar o efeito de três sistemas de preparo do solo na FCO 2 , temperatura e umidade do solo em área de reforma da cultura de cana-de-açúcar. A área experimental foi constituída de três parcelas, cada uma recebendo um dos preparos do solo: preparo convencional (PC), subsolagem convencional (SC) e subsolagem localizada (SL). A FCO 2 , temperatura e a umidade do solo foram avaliadas durante o período total de 17 dias. A FCO 2 foi maior no preparo PC (0,75 g CO 2 m -2 h -1 ). A temperatura do solo não diferiu (p > 0,05) entre as subsolagens: SL (26,2 ºC) e SC (25,9 ºC). A umidade do solo foi maior na SL (24%), seguida pela SC (21,8%) e preparo PC (18,3%). Apenas no preparo PC foi observada correlação significativa (r = -0,71; p < 0,05) entre FCO 2 e a temperatura do solo. O preparo PC apresentou emissão total (2.864,3 kg CO 2 ha -1 ), superior às emissões nas subsolagens: SC (1.970,9 kg CO 2 ha -1 ) e SL (1.707,7 kg CO 2 ha -1 ). A conversão do sistema de preparo PC para a SL diminuiu as emissões de CO 2 do solo, reduzindo a contribuição da agricultura para o aumento dos gases de efeito estufa na atmosfera.Soil tillage and emission of CO 2 , soil temperature and soil moisture in a sugarcane area A B S T R A C TSoil tillage is one of the agricultural practices that may contribute to increase the loss of carbon through emission of CO 2 (FCO 2 ). The aim of this study was to investigate the effect of three soil tillage systems on FCO 2 , soil temperature and soil moisture in a sugarcane area under reform. The experimental area consisted of three tillage plots: conventional tillage (CT), conventional subsoiling (CS), and localized subsoiling (LS). FCO 2 , soil temperature and soil moisture were measured over a period of 17 days. FCO 2 showed the highest value in CT (0.75 g CO 2 m -2 h -1 ). Soil temperature presented no significant difference (p > 0.05) between LS (26.2 °C) and CS (25.9 °C). Soil moisture was higher in LS (24%), followed by CS (21.8%) and CT (18.3%). A significant correlation (r= -0.71; p < 0.05) between FCO 2 and soil temperature was observed only in CT. The conventional tillage presented a total emission (2,864.3 kg CO 2 ha -1 ) higher than the emissions observed in CS (1,970.9 kg CO 2 ha -1 ) and LS (1,707.7 kg CO 2 ha -1 ). The conversion from CT to LS decreased soil CO 2 emissions, reducing the contribution of agriculture in increasing the concentration of greenhouse gases in the atmosphere. Palavras-chave:respiração do solo subsolagem cana-de-açúcar gases do efeito estufa

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“…However, measurements in forest, Cerrado, and agricultural areas in other Brazilian regions (Sotta et al, 2004;Valentini et al, 2008;Panosso et al, 2009;Pinto-Junior et al, 2009;Zanchi et al, 2012) (Moitinho et al, 2013); all other maximum values were two to five times higher than the minimum values. These findings suggest that the IRGA methodology has higher sensitivity in detecting ECO 2 differences than the AA methodology.…”

Section: Rev Bras Cienc Solo 2018;42:e0160563mentioning

confidence: 78%

Soil CO2 Efflux Measurements by Alkali Absorption and Infrared Gas Analyzer in the Brazilian Semiarid Region

Ferreira

Antonino

Sampaio

et al. 2018

Rev. Bras. Ciênc. Solo

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ABSTRACT:The CO 2 emission from the soil surface, commonly referred to as soil CO 2 efflux (ECO 2 ) or soil respiration, is the sum of processes that include root respiration and microbial activity. Measuring this evolution is important to establish sustainable land use models and to estimate global fluxes of carbon, which affect climate change. Despite its importance, few measurements have been made in areas of the semiarid Brazilian Northeast region, and most of them were made using the alkali absorption method (AA), which can underestimate ECO 2 . Measurements using AA were compared to measurements using the infrared gas analyzer method (IRGA) over ten months (in rainy and dry seasons), during the day and night, in areas of Caatinga (xeric shrubland and thorn forest) and pasture in the Agreste region of the state of Pernambuco. The ECO 2 measurements from AA varied little from night to day and throughout the year or in the rainy and dry seasons. However, those obtained from IRGA were higher in the rainy than in the dry season, but also without significant differences from day to night. The values of both methods were similar in the dry season, but in the rainy season they were higher with the IRGA. Therefore, AA seems to have little sensitivity to seasonal variations, in contrast with measurements from the IRGA, and it may underestimate soil ECO 2 when it attains higher values. This result indicates that some of the soil ECO 2 values determined in areas of the Brazilian semiarid region, and consequently annual C losses, may have been underestimated.

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Efeito do preparo do solo e resíduo da colheita de cana-de-açúcar sobre a emissão de CO2

Cited by 32 publications

References 30 publications

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

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

Preparo do solo e emissão de CO2, temperatura e umidade do solo em área canavieira

Soil CO2 Efflux Measurements by Alkali Absorption and Infrared Gas Analyzer in the Brazilian Semiarid Region

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