Estoque de carbono e atividade microbiana em sistema de plantio direto consolidado no Sul do Brasil

Mazurana, Michael; Fink, Jessé Rodrigo; Camargo, Estefânia Silva; Schmitt, Catiline; Andreazza, Robson; Oliveira, Flávio Anastácio de

doi:10.19084/rca.16311

Cited by 3 publications

(3 citation statements)

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“…Higher CO2 release often occurs due to increased biological activity directly related to soil labile carbon [47]. The MANOVA demonstrated that grass cover and depth significantly affected the first three PCs, including physical and chemical soil attributes (pH, P, Al 3+ , and OM contents, besides CEC, base saturation, particle density, and total porosity).…”

Section: Discussionmentioning

confidence: 95%

Soil Health in an Integrated Production System in a Brazilian Semiarid Region

de Brito Neto,

Chaves,

da Silva

et al. 2023

Land

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Soil health is directly related to sustainable development goals (SDGs) and can be affected by inadequate management practices. In this work, soil edaphic respiration and changes in microbial biomass promoted by cover crops in an integrated crop–livestock system (ICLS) were evaluated using soil health indicators with the respirometry method. The design was completely randomized in a 3 × 6 factorial arrangement, and multivariate principal components analysis (PCA) was performed according to MANOVA. Edaphic respiration was determined based on the respirometry technique. The results showed that edaphic soil respiration was significant in the nine evaluation periods, demonstrating the importance of grass cover in edaphic respiration arising from the biological activity of microorganisms, which is directly related to the amount of soil organic carbon. The cover crops increased soil organic matter and consequently microbial respiratory activity.

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Section: Discussionmentioning

confidence: 95%

Soil Health in an Integrated Production System in a Brazilian Semiarid Region

de Brito Neto,

Chaves,

da Silva

et al. 2023

Land

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“…The no-tillage vegetable system with intercropped cover plants (RY + OR) exceeded the C and N stocks in the analyzed soil profile (0-30 cm) compared to the conventional tillage system and the no-tillage vegetable system with spontaneous vegetation and other treatments with cover plants. Several studies in the literature restate the benefits of using the no-tillage vegetable system regarding C and N stocks [55][56][57][58][59]. Notably, for the C stocks in the 0-30 cm layer, the cover plants intercrop (RY + OR and BO + OR) was more efficient in increasing the C stocks than RY, BO, and SV single crops.…”

Section: Discussionmentioning

confidence: 99%

Effects of Tillage and Cover Crops on Total Carbon and Nitrogen Stocks and Particle-Size Fractions of Soil Organic Matter under Onion Crop

et al. 2023

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Onion (Allium cepa L.) is a food crop of economic importance. In Brazil, the crop typically occurs in a conventional tillage system (CT), which favors the mineralization and decomposition of soil organic matter (SOM) and the loss of carbon (C) and nitrogen (N). On the other hand, the no-tillage vegetable system (NTVS) operates based on sustainable pillars and bypasses the adverse effects of CT. This study evaluated the total C and N stocks and particle-size fractions of SOM in NTVS with single and intercropped cover plants compared to vegetable crops under CT. The NTVS evaluated treatments were as follows: (1) spontaneous vegetation (SV); (2) black oats (BO); (3) rye (RY); (4) oilseed radish (OR); (5) RY + OR; and (6) BO + OR. A treatment under CT with millet cover, a no-tillage system with (NTS) millet + velvet + sunflower cover, and a forested area as the original condition was also evaluated. Soil samples were collected in 0–5, 5–10, and 10–30 cm layers. Stocks of total organic C (TOC), total N (TN), particulate OC (POC), particulate N (PN), mineral-associated OC (MAOC), and mineral-associated N (MN) were evaluated. The highest stocks of TOC, TN, POC, and NM were found in NTVS compared to CT, and RY + OR showed the best results. The NTVS showed higher TOC and TN stocks with grasses and cruciferous intercropped than NTVS with SV and CT. POC and PN stocks increased in areas with single and intercropped RY and OR treatments. MAOC and MN stocks were higher than forest in RY + OR intercrop in the topsoil layer. RY and OR intercrop efficiently added C and N to the soil under NTVS. The consortium of millet + velvet + sunflower in NTS showed higher TOC, TN, POC, and PN stocks compared to the other treatments (0–5 and 0–30 cm). In general, the intercrop of cover plants is ideal for obtaining the NTVS maximum potential, favoring several mechanisms between soil, plant, and atmosphere, resulting in improved soil quality, increased organic matter, and higher stocks of C and N.

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“…According by in Reference [40] greater CO2 release generally occurs due to greater biological activity, which is directly related to the amount of labile carbon in the soil. MANOVA demonstrated that the first three principal components and phosphorus contents were significantly influenced by soil cover varieties and sampling depth for the variables related to physical and chemical soil attributes (pH, phosphorus content in the soil, aluminum content, organic matter content, cation exchange capacity, base saturation, particle density and total porosity).…”

Section: Discussionmentioning

confidence: 99%

Soil Sustainability in an Integrated Production System in a Brazilian Semi-Arid Region

Neto¹,

Chaves²,

Silva³

et al. 2023

Preprint

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Soil quality is a factor which is directly related to the sustainability of agricultural production and can be compromised through the use of inadequate management practices. In this work, soil edaphic respiration and changes in microbial biomass promoted by cover crops in an integrated crop-livestock system (ICLS) were evaluated using soil quality indicators by the respirometry method. The design used was completely randomized in a 3x6 factorial scheme and multivariate principal components analysis (PCA) was performed according to MANOVA. The edaphic respiration was determined based on the respirometry technique. From the results, it was found that edaphic soil respiration was significant in the nine evaluation periods, demonstrating the importance of grass cover on this edaphic respiration arising from the biological activity of microorganisms, which is directly related to the amount of organic carbon in the soil. It was concluded that the use of cover crops contributed to producing organic matter in the soil and consequently greater microbial respiratory activity.

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Estoque de carbono e atividade microbiana em sistema de plantio direto consolidado no Sul do Brasil

Cited by 3 publications

References 0 publications

Soil Health in an Integrated Production System in a Brazilian Semiarid Region

Soil Health in an Integrated Production System in a Brazilian Semiarid Region

Effects of Tillage and Cover Crops on Total Carbon and Nitrogen Stocks and Particle-Size Fractions of Soil Organic Matter under Onion Crop

Soil Sustainability in an Integrated Production System in a Brazilian Semi-Arid Region

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