Emissão de CO2 do solo associada à calagem em área de conversão de laranja para cana-de-açúcar

Silva, Eliton de F.; Moitinho, Mara Regina; Teixeira, Daniel De Bortoli; Pereira, Gener Tadeu; Scala, Newton La

doi:10.1590/s0100-69162014000500008

Cited by 7 publications

(4 citation statements)

References 23 publications

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“…The mean value of FCO 2 (2.91 µmol m −2 s −1 ) over the 28-day period (Table 2 ) was similar to that observed by Iamaguti et al 11 in a study also conducted on an Oxisol in sugarcane areas under the most intense soil tillage (conventional soil tillage). Moreover, the values observed for Ts (22.6 °C) and Ms (16.95%) were in accordance with the values reported in other studies carried out after sugarcane field reform 8 , 9 . These values are consistent with the characteristics of areas under reform, as soil tillage provides low soil moisture values and high soil temperatures.…”

Section: Resultssupporting

confidence: 91%

Soil CO2 emission and soil attributes associated with the microbiota of a sugarcane area in southern Brazil

Moitinho

Teixeira

Bicalho

et al. 2021

Sci Rep

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The spatial structure of soil CO2 emission (FCO2) and soil attributes are affected by different factors in a highly complex way. In this context, this study aimed to characterize the spatial variability patterns of FCO2 and soil physical, chemical, and microbiological attributes in a sugarcane field area after reform activities. The study was conducted in an Oxisol with the measurement of FCO2, soil temperature (Ts), and soil moisture (Ms) in a regular 90 × 90-m grid with 100 sampling points. Soil samples were collected at each sampling point at a depth of 0–0.20 m to determine soil physical (density, macroporosity, and microporosity), particle size (sand, silt, and clay), and chemical attributes (soil organic matter, pH, P, K, Ca, Mg, Al, H + Al, cation exchange capacity, and base saturation). Geostatistical analyses were performed to assess the spatial variability and map soil attributes. Two regions (R1 and R2) with contrasting emission values were identified after mapping FCO2. The abundance of bacterial 16S rRNA, pmoA, and nifH genes, determined by real-time quantitative PCR (qPCR), enzymatic activity (dehydrogenase, urease, cellulase, and amylase), and microbial biomass carbon were determined in R1 and R2. The mean values of FCO2 (2.91 µmol m−2 s−1), Ts (22.6 °C), and Ms (16.9%) over the 28-day period were similar to those observed in studies also conducted under Oxisols in sugarcane areas and conventional soil tillage. The spatial pattern of FCO2 was similar to that of macropores, air-filled pore space, silt content, soil organic matter, and soil carbon decay constant. No significant difference was observed between R1 and R2 for the copy number of bacterial 16S rRNA and nifH genes, but the results of qPCR for the pmoA gene presented differences (p < 0.01) between regions. The region R1, with the highest FCO2 (2.9 to 4.2 µmol m−2 s−1), showed higher enzymatic activity of dehydrogenase (33.02 µg TPF g−1 dry soil 24 h−1), urease (41.15 µg NH4–N g−1 dry soil 3 h−1), amylase (73.84 µg glucose g−1 dry soil 24 h−1), and microbial biomass carbon (41.35 µg C g−1 soil) than R2, which had the lowest emission (1.9 to 2.7 µmol m−2 s−1). In addition, the soil C/N ratio was higher in R2 (15.43) than in R1 (12.18). The spatial pattern of FCO2 in R1 and R2 may not be directly related to the total amount of the microbial community (bacterial 16S rRNA) in the soil but to the specific function that these microorganisms play regarding soil carbon degradation (pmoA).

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Section: Resultssupporting

confidence: 91%

Soil CO2 emission and soil attributes associated with the microbiota of a sugarcane area in southern Brazil

Moitinho

Teixeira

Bicalho

et al. 2021

Sci Rep

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“…However, the assessments were only made in the first year of sugarcane plantations, a period not long enough for a considerable increase of OM, among other soil chemical properties. Silva et al, (2014) observed that the absence of liming the soil and no soil disturbance resulted in a significant reduction in rates of loss of OM.…”

Section: Resultsmentioning

confidence: 97%

Evaluation of chemical attributes of soil under different management systems of sugarcane in an area of expansion

Lana¹,

Maia²,

Vasconcelos³

et al. 2016

Biosci. J.

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ABSTRACT:In the area of expansion, where if you have restriction on fertility, soil preparation has contributed considerably to the improvement of the physical, chemical and water conditions of soils and, consequently, to the proper development of culture of sugarcane. The aim of this study was to evaluate the effect of different management techniques on the availability of nutrients in soil in an area of expansion of sugarcane, formerly with Brachiaria decumbens, in the Cerrado region. The experiment was conducted using the CTC 2 variety at Jalles Machado mill in Goianésia, GO. The experiment was established in a randomized block design, with six treatments and four replications. Chemical attributes of soil were evaluated at depths of 0-20, 20-40 and 40-60 cm. Significant differences were found among depths for all analyzed attributes. Adopted management systems influenced chemical attributes and the availability of nutrients for plants. Invertion of soil through plowing and harrowing is extremely beneficial to carry out soil amendment in the first year of cultivation, improving the incorporation and effectiveness of the corrective. The adoption of no-tillage system did not prove to be the best option for the first year of sugarcane cultivation, hindering the incorporation of the corrective.

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“…Additionally, the higher fertility and lower acidity of the soils in the studied açai palm tree groves (Table 1), compared to dryland soils in the Amazon, usually with lower pH values (Worbes, 1997), may also help explain the higher CO 2 flux averages in the floodplain. It has been proven that high active acidity conditions and low pH contribute to reduced microorganism activity (Silva et al, 2014;Alves and Martins, 2015).…”

Section: Resultsmentioning

confidence: 99%

Carbon emissions in hydromorphic soils from an estuarine floodplain forest in the Amazon River

Lira-Guedes

Leal

Fischer

et al. 2021

Rev. Bras. Ciênc. Ambient.

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Carbon dioxide (CO2) is produced only in biological activities. Understanding how soil tillage practices affect the dynamics of CO2 production is important, as these processes are influenced by the temperature and humidity conditions of the place. This paper aimed at quantifying CO2 flux in hydromorphic floodplain soils under different açai palm tree grove management strategies, correlating it with litter deposition, soil environment, and season of the year. Conducted in the city of Mazagão-AP, four areas of açai palm tree groves were selected with different types of management. During the evaluation period (October, November, and December 2012, and February, March, and April 2013), CO2 flux, soil moisture, and temperature were measured, and litter samples were collected. In addition, rainfall data for the region were also obtained. The CO2 fluxes obtained ranged from 0.37 to 28.55 μmol CO2 m-2 s-1, with a total average of 6.20 μmol CO2 m-2 s-1. In broad analysis, soil variables did not show significant correlations with CO2 emissions. A positive relationship between flux and litter and soil temperature, as well as a negative relationship with its moisture, were observed only in a few months and specific systems.

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Emissão de CO2 do solo associada à calagem em área de conversão de laranja para cana-de-açúcar

Cited by 7 publications

References 23 publications

Soil CO2 emission and soil attributes associated with the microbiota of a sugarcane area in southern Brazil

Soil CO2 emission and soil attributes associated with the microbiota of a sugarcane area in southern Brazil

Evaluation of chemical attributes of soil under different management systems of sugarcane in an area of expansion

Carbon emissions in hydromorphic soils from an estuarine floodplain forest in the Amazon River

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