Tillage systems effects on soil carbon stock and physical fractions of soil organic matter

Pinheiro, Érika Flávia Machado; Campos, D. V. B. de; Balieiro, Fabiano de Carvalho; Anjos, Lúcia Helena Cunha dos; Pereira, Marcos Gervásio

doi:10.1016/j.agsy.2014.08.008

Cited by 48 publications

(36 citation statements)

References 26 publications

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“…In contrast, soil organic C associated with sand fractions was the most sensitive C fraction responding to soil tillage systems in a short period of time in areas cultivated with sugarcane in Australia (THORBURN et al, 2012) and with a rotation of vegetables, including tomato, green pepper and beans, in Rio de Janeiro State, Brazil (PINHEIRO et al, 2015). The absence of a response for POM in this study may be related to the soil sampling period because the largest amount of residues is observed immediately after harvesting.…”

Section: Discussioncontrasting

confidence: 58%

“…Some studies have shown that most of the C accumulated in minimal tillage and no-till systems, relative to CT, is stored in the mineral-associated fraction, emphasizing the importance of the organomineral interaction as a stabilization mechanism in these systems (CAMPOS et al, 2011;PINHEIRO et al, 2015). In contrast, soil organic C associated with sand fractions was the most sensitive C fraction responding to soil tillage systems in a short period of time in areas cultivated with sugarcane in Australia (THORBURN et al, 2012) and with a rotation of vegetables, including tomato, green pepper and beans, in Rio de Janeiro State, Brazil (PINHEIRO et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…According to Thorburn et al (2012) the absence of differences in the SOC are possibly due to cultivation and variation in bulk density between treatments, as well as difficulties in detecting small changes in total soil organic matter or organic carbon because of generally high background levels and natural soil variability. Some authors state that the effect of changes in land use and soil management on SOC, even in a short period of time, may be identified by variations in the sub pools or fractions of soil organic matter or organic carbon, which are more noticeable than the TOC (GALDOS et al, 2009;PINHEIRO et al, 2015;THORBURN et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Carbon fractions and soil fertility affected by tillage and sugarcane residue management an Xanthic Udult

Lopes

Assunção

Oliveira

et al. 2017

SCA

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The gradual change in management practices in sugarcane (Saccharum spp.) production from burning straw to a green harvesting system, as well as the use of minimum soil tillage during field renovation, may affect soil fertility and soil organic matter (SOM) contents. The objectives of this work were to investigate the influence of sugar cane production systems on: (1) soil fertility parameters; (2) on physical carbon fractions; (3) and on humic substance fractions, in a long-term experiment, comparing two soil tillage and two residue management systems an Xanthic Udult, in the coastal tableland region of Espírito Santo State, Brazil. The treatments consisted of plots (conventional tillage (CT) or minimum tillage (MT)) and subplots (residue burned or unburned at harvesting), with five replicates The highest values of Ca 2+ + Mg 2+ and total organic carbon (TOC) were observed in the MT system in all soil layers, while high values of K + were observed in the 0.1-0.2 m layer. The CT associated with the burned residue management negatively influenced the TOC values, especially in the 0.1-0.2 and 0.2-0.4 m layers. The carbon in the humin fraction and organic matter associated with minerals were significantly different among the tillage systems; the MT showed higher values than the CT. However, there were no significant differences between the sugarcane residue management treatments. Overall, fractioning the SOM allowed for a better understanding of tillage and residue management systems effects on the soil properties. Key words: Saccharum spp. Soil tillage systems. Residue retention. ResumoA mudança gradual nas práticas de manejo da cana de açúcar (Saccharum spp.) de colheita com queima de palha para o sistema de colheita sem queima, bem como o uso de preparo mínimo do solo durante a renovação do canavial, podem afetar a fertilidade do solo e o conteúdo de matéria orgânica do solo (MOS). Os objetivos específicos foram investigar a influência de sistemas de produção de cana-deaçúcar sobre: (1) os parâmetros de fertilidade do solo; (2) sobre as frações físicas do carbono; (3) e em frações de substâncias húmicas, em um experimento de longa duração, comparando dois tipos de preparo do solo e dois sistemas de manejo da palhada em Argissolo Amarelo, na região tabuleiros costeiros do Espírito Santo, Brasil. Os tratamentos consistiram de parcelas (preparo convencional (PC)

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Section: Discussioncontrasting

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Carbon fractions and soil fertility affected by tillage and sugarcane residue management an Xanthic Udult

Lopes

Assunção

Oliveira

et al. 2017

SCA

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“…For Brazilian Ferralsols, Haynes and Naidu (1998) showed that increased soil pH values were related to clay dispersion and decreased the infiltration rates in accordance with our findings ( Table I). No-tillage systems were largely implemented in the Cerrado in the early 1990s (FAO, 2001;reviewed by Bernoux et al, 2006); these systems are well known for their positive effects on C-storage (e.g., Carvalho et al, 2009;Neto et al, 2010;Pinheiro et al, 2014) and for stabilising aggregates (Green et al, 2007). The highest aggregate stability was related to Cerrado, pastures and eucalyptus plantations; interestingly, the stable aggregates were not related to notill soybean systems (although no-till accumulated the most organic carbon).…”

Section: Discussion Of the Combined Effects Of Water And Land Degradamentioning

confidence: 99%

The Brazilian Cerrado: assessment of water and soil degradation in catchments under intensive agricultural use

et al. 2014

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The Brazilian Cerrado is recognized as one of the most threatened biomes in the world, as the region has experienced a striking change from natural Cerrado vegetation to intense cash crop production. This paper reviews the history of land conversion in the Cerrado and the development of soil properties and water resources under past and ongoing land use. We compared soil and water quality parameters from different land uses considering 80 soil and 18 water studies conducted in different regions across the Cerrado to provide quantitative evidence of soil and water alterations from land use change. Following the conversion of native Cerrado, significant effects on soil pH, bulk density and available P and K for croplands and less-pronounced effects on pastures were evident. Soil total N did not differ between land uses because most of the sites classified as croplands were nitrogen-fixing soybeans, which are not artificially fertilized with N. In contrast, water quality studies showed nitrogen enrichment in agricultural catchments, indicating fertilizer impacts and potential susceptibility to eutrophication. Regardless of the land use, P is widely absent because of the high-fixing capacities of deeply weathered soils and the filtering capacity of riparian vegetation. Pesticides, however, were consistently detected throughout the entire aquatic system. In several case studies, extremely high-peak concentrations exceeded Brazilian and European Union (EU) water quality limits, which were potentially accompanied by serious health implications. Land use intensification is likely to continue, particularly in regions where less annual rainfall and severe droughts are projected in the northeastern and western Cerrado. Thus, the leaching risk and displacement of agrochemicals are expected to increase, particularly because the current legislation has caused a reduction in riparian vegetation. We conclude that land use intensification is likely to seriously limit the Cerrado's future regarding both agricultural productivity and ecosystem stability. Because only limited data are available, we recommend further field studies to understand the interaction between terrestrial and aquatic systems. This study may serve as a valuable database for integrated modelling to investigate the impact of land use and climate change on soil and water resources and to test and develop mitigation measures for the Cerrado.

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“…On the other hand, the highest endurance of carbon in more recalcitrant fraction, as MOM may be explained by association with the complex mineral-organic that is linked to soils like Oxisol, where it is possible to obtain strong association of humidified organic matter with caulinitic clays and Al/Fe oxy-hydroxides. Pinheiro et al (2015) noticed predominance in the MOM in soil than the more labile fractions (POC), due to the highest decomposition in Oxisol. Besides, the highest content of clays in Oxisol increases the amount of microspores and decreases the chance of microorganism to mineralize the SOM (Hartman et al, 2014).…”

Section: Cover Crops Affects On Particulate Organic Carbonmentioning

confidence: 99%

Cover crops affect on soil organic matter fractions under no till system

Ensinas¹,

Serra

Marchetti³

et al. 2016

Aust J Crop Sci

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The purpose of this research was to identify the soil organic matter (SOM) fractions changes in a crop rotation system under no-till system (NTS). This research was carried out from October 2010 to February 2014 in a Rhodic Hapludox. The experiment was set up in completely randomized blocks in a factorial design with eight cover crops and three soil depths (0-5, 5-10 and 10-20 cm) with four repetitions. Cover crops: fall-winter corn, intercropping fall-winter corn with Brachiaria ruziziensis, intercropping fall-winter corn with B. brizantha cv. Marandu, intercropping fall-winter corn with Crotalaria spectabilis, B. ruziziensis, B. brizantha cv. Marandu, Pennisetum glaucum L. and set-aside area. The results of SOM granulometric fractionation showed that 6.5% of the total organic carbon (TOC) stocks were in the particulate organic carbon (POC) fraction. The low values of POC observed in this research are associated with the weather condition of experimental site, which shows high temperature and moisture. In relation to the labile carbon (LC), the highest LC stock was observed in 0-5 cm depth, which differed from the 10-20 cm depth. The POC, LC and labile nitrogen (LN) were the SOM fractions that showed to be more sensitive to detect the changes promoted by the cover crops and soil depths in NTS, as well as the carbon management index (CMI). The intercropping fall-winter corn with B. brizantha cv. Marandu and B. ruziziensis were efficient in increasing the CMI in deeper depth (10-20 cm).

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Tillage systems effects on soil carbon stock and physical fractions of soil organic matter

Cited by 48 publications

References 26 publications

Carbon fractions and soil fertility affected by tillage and sugarcane residue management an Xanthic Udult

Carbon fractions and soil fertility affected by tillage and sugarcane residue management an Xanthic Udult

The Brazilian Cerrado: assessment of water and soil degradation in catchments under intensive agricultural use

Cover crops affect on soil organic matter fractions under no till system

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