Dinâmica do carbono no solo sob diferentes usos da terra em Paragominas, PA

Chaves, Siglea Sanna de Freitas

doi:10.11606/d.11.2014.tde-29052014-171038

Cited by 2 publications

(1 citation statement)

References 19 publications

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“…Petter et al (2017), in studies conducted in southern Brazilian Amazon, show that long-term carbon losses can contribute significantly to the accumulation of CO2 in the atmosphere and also undermine the sustainability of agricultural production in the Amazon, with direct consequences for exchangeable base levels and cation exchange capacity, since total organic carbon is directly related to these attributes in these soils. In a clayey Yellow Oxisol in the city of Paragominas, state of Pará , Brazil, Chaves (2014) observed that the lowest soil carbon contents were found in a newly implanted area with the crop-livestock integration system, which was initially subjected to plowing and harrowing. The soil carbon values obtained by the author were very similar to those obtained in this work, in an area under conventional system.…”

Section: Content and Stock In The Soilmentioning

confidence: 97%

Changes in Carbon Stocks and Chemical Attributes of an Oxisol as a Result of Adoption Period of No-tillage System in the Brazilian Eastern Amazon

Brasil

Dantas

Júnior

et al. 2020

JAS

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The conversion of forest areas to grain cropping has promoted a decrease in soil organic matter stocks in the Amazon. This process is most striking when the conventional cultivation system is used. In order to evaluate the changes in soil carbon and nutrient stocks resulting from the time of adoption of the no tillage system in a dystrophic Yellow Oxisol of the Brazilian Amazon biome, a study was conducted in a grain producing area in the northeastern of Pará, Brazil. The treatments corresponded to the following systems: CT6- conventional tillage system with six years of implementation; No-tillage system with 3 (NT3), 4 (NT4) and 7 (NT7) years of implementation. All systems were always cultivated in corn / soybean rotation. Deformed and non-deformed soil samples were collected on a the 2013 crop year at 0-10, 10-20 and 20-40 cm depths. Stocks of carbon (SC) and phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg) were calculated by using the equivalent soil mass methodology. Regardless of depth, the NT showed higher SC values than the CT. The adoption of NT showed a tendency of increasing SC of the soil over time. Such increases were up to 36% of the NT7 compared to the CT6. In NT7, the stocks of K, Ca and Mg were higher in relation to PC6. The EC correlated positively with the stocks of K, Ca and Mg in the areas under NT, regardless of the time of system adoption, up to 40 cm deep, indicating improvements in the soil fertility.

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Section: Content and Stock In The Soilmentioning

confidence: 97%

Changes in Carbon Stocks and Chemical Attributes of an Oxisol as a Result of Adoption Period of No-tillage System in the Brazilian Eastern Amazon

Brasil

Dantas

Júnior

et al. 2020

JAS

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Stock and indices of carbon management under different soil use systems

Morais

Silva

Rosset

et al. 2021

Rev. Bras. Ciênc. Ambient. (Online)

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The aim of this study was to evaluate the stock of total organic carbon (TOC) and to perform the physical-granulometric fractionation of soil organic matter (SOM) in different management systems (MS). Three MS and one reference area of Native Forest (NF) were studied, and the three systems were sugarcane (SC), permanent pasture (PP) and no-tillage system (NTS). Soil samples were collected in the 0–0.05, 0.05–0.10, 0.10–0.20-m layers. Soil density (Sd), TOC, stratification index (SI), carbon stock (StockC), variation in StockC (∆StockC), carbon content of particulate organic matter (C-POM) and mineral organic matter (C-MOM), carbon stock index (CSI), lability (L), lability index (LI), and carbon management index (CMI) were determined. The MS presented higher Sd than the NF area. The NF area had higher TOC contents in the first layers, reaching 25.40 g kg-1 in the 0–0.05-m layer, with the PP area having higher values than the NF in the 0.10–0.20-m layer. The NF area showed the highest levels of C-POM (15.25 g kg-1) and C-MOM (10.15 g kg-1) in the first layer. In the 0.10–0.20-m layer, the PP and NTS systems were superior to the others. Regarding the C-MOM content, SC and PP showed higher levels in the 0.10–0.20-m layer. The highest CMI values were observed in the NTS and PP areas in the 0.10–0.20-m layer. The MS increased the Sd and reduced the TOC levels. The different MS modified the POM fraction, and the MOM fraction was most impacted by the SC area. The lability of the SOM was altered by the MS in the most superficial layers.

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Dinâmica do carbono no solo sob diferentes usos da terra em Paragominas, PA

Cited by 2 publications

References 19 publications

Changes in Carbon Stocks and Chemical Attributes of an Oxisol as a Result of Adoption Period of No-tillage System in the Brazilian Eastern Amazon

Changes in Carbon Stocks and Chemical Attributes of an Oxisol as a Result of Adoption Period of No-tillage System in the Brazilian Eastern Amazon

Stock and indices of carbon management under different soil use systems

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