Atributos físicos do solo em cultivo de cebola sob sistemas de plantio direto e preparo convencional

Loss, Arcângelo; Santos, Elano dos; Schmitz, Daniela; Veiga, Milton da; Kurtz, Claudeine; Comin, Jucinei José

doi:10.17584/rcch.2017v11i1.6144

Cited by 18 publications

(25 citation statements)

References 9 publications

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“…2). The stratification observed in the MWD coincides with previous studies (Loss, et al, 2017), in which important changes of the MWD were observed, with the depth in soils with different soil use systems and management. This situation can be related to differences of higher organic matter and biological activity, and a higher number of roots in some soil layers, which favor a better size of the stable aggregates.…”

Section: Resultssupporting

confidence: 89%

Impact of soil use on aggregate stability and its relationship with soil organic carbon at two different altitudes in the Colombian Andes

Visconti-Moreno¹,

Valenzuela-Balcázar²

2019

Agron. colomb.

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The stability of soil aggregates depends on the organic matter, and the soil use and management can affect the soil organicmatter (SOM) content. Therefore, it is necessary to know therelationship between aggregate stability and the content of SOMin different types of soil use at two different altitudes of theColombian Andes. This study examined the conditions of soilaggregate stability expressed as a distribution of the size classes of stable aggregates (SA) and of the mean weighted diameter of the stable aggregates (MWD). To correlate these characteristics with the soil organic carbon (OC), we measured the particulate organic matter pool (POC), the OC associated with the mineral organic matter pool (HOC), the total organic carbon content (TOC), and the humification rate (HR). Soils were sampled at two altitudes: 1) Humic Dystrudepts in a cold tropical climate (CC) with three plots: tropical mountain rainforest, pastures, and crops; 2) Fluvaquentic Dystrudepts in a warm tropical climate (WC) with three plots: tropical rainforest, an association of oil palm and pastures, and irrigated rice. Soils were sampled at three depths: 0-5, 5-10 and 10-20 cm. The physical properties, mineral particle size distribution, and bulk density were measured. The content of SA with size>2.36 mm was higher in the CC soil (51.48%) than in the WC soil (9.23%). The SA with size 1.18-2.36 mm was also higher in the CC soil (7.78%) than in the WC soil (0.62%). The SA with size 0.60-1.18 mm resulted indifferent. The SA with size between 0.30 and 0.60 mm were higher in the WC soil (13.95%) than in the CC soil (4.67%). The SA<0.30 mm was higher in the WC soil (72.56%) than in the CC soil (32.15%). It was observed that MWD and the SA>2.36 mm increased linearly with a higher POC, but decreased linearly with a higher HR. For the SA<0.30 mm, a linear decrease was observed at a higher POC, while it increased at a higher HR.

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Section: Resultssupporting

confidence: 89%

Impact of soil use on aggregate stability and its relationship with soil organic carbon at two different altitudes in the Colombian Andes

Visconti-Moreno¹,

Valenzuela-Balcázar²

2019

Agron. colomb.

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“…It occurs because of the management of the area using the conventional tillage system, with an intense traffic of agricultural machinery (Gennaro et al, 2015). Loss et al (2017) worked with the conventional tillage and notillage systems and observed high Sd values in the CT area, which was attributed to the process of intense soil disturbance.…”

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confidence: 99%

Soil Carbon Stock in Different Uses in the Southern Cone of Mato Grosso Do Sul

Martins

Troian

Rosset

et al. 2020

Rev. Agric. Neotrop.

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This study aimed to assess the soil density (Sd) and the total organic carbon contents and stocks in different management systems and implementation times in the municipality of Iguatemi, MS, Brazil. A completely randomized design with four replications was applied to four areas: conventional tillage (CT), reformed pasture (RP), and degraded pasture (DP), in addition to a native forest (NF) area with no anthropic action. Disturbed and undisturbed soil samples were collected at depths of 0–0.05, 0.05–0.1, and 0.1–0.2 m. The determination of Sd and total organic carbon content (TOC) allowed calculating the carbon stock (Cstock), the stratification index (SI), and the carbon stock variation (ΔCstock), with subsequent multivariate analysis. The NF area presented the highest TOC contents at all depths compared to the managed areas, with a value of 17.45 g kg−1 at a depth of 0–0.05 m. The RP and NF areas showed similar SI, which was higher in PD, with a value of 2.54. Except for RP, the other managed areas showed a negative ΔCstock in the soil profile relative to the NF area. The RP and NF areas promoted the maintenance of TOC in the soil, while DP and CT compromised the edaphic quality.

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“…The increase in Bd in NT soils decreased the soil porosity, as reported in previous studies (Silveira et al, 1999;Silva et al, 2008). In contrast, an increase in soil porosity in the surface layer was observed by Loss et al (2017) in vegetables grown under NT compared to conventional tillage, and this result was attributed to the higher number of roots and consequently higher occurrence of voids in the soil matrix. In turn, Costa et al (2003) found no differences in total porosity, macroporosity and microporosity in a Brazilian Latosol managed in the long-term under NT and conventional tillage.…”

Section: Effects On Soil Structurementioning

confidence: 82%

Soil Physical Quality After 21 Years of Cultivation in a Brazilian Cerrado Latosol

Ngolo¹,

Oliveira²,

Assis³

et al. 2019

JAS

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Long-term studies aiming soil quality evaluation under different soil management strategies are no common. Long-term evaluations provided more reliable contributions to decision-making and practices adoption. This study evaluated the soil physical quality of a Brazilian Cerrado Latosol after 21 years of three different soil management strategies: disc plowing (DP), no-tillage (NT), and disc harrowing+subsoiling (DHS). In comparison to the reference, a soil from a native Cerrado area, the removal of the original vegetation and the implementation of the three soil management strategies increased the soil bulk density (Bd) and reduced soil porosity, macroporosity, soil organic carbon (SOC) and the size of water-stable aggregates, but did not change the glomalin-related soil protein (GRSP) contents and clay flocculation. Similar effects were diagnosed on soil physical quality when is considered only the three different management strategies, especially on soil porosity, Bd, size of water-stable aggregates, SOC and GRSP contents. Strategies of DP and NT increased soil resistance to penetration in the superficial layers, while the annual use of DHS reduced this soil mechanical characteristic. The NT system did not provide increasing of soil organic carbon in comparison to other management practices evaluated. In conclusion, removing the native vegetation affected soil physical quality, but the Brazilian Cerrado soil is resilient to physical damage even when different intensive farming practices are implemented for more than two decades. The limitation of the NT system in improving the soil physical quality is related to climate conditions that determine the non-maintenance of straw on the soil surface.

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Atributos físicos do solo em cultivo de cebola sob sistemas de plantio direto e preparo convencional

Cited by 18 publications

References 9 publications

Impact of soil use on aggregate stability and its relationship with soil organic carbon at two different altitudes in the Colombian Andes

Impact of soil use on aggregate stability and its relationship with soil organic carbon at two different altitudes in the Colombian Andes

Soil Carbon Stock in Different Uses in the Southern Cone of Mato Grosso Do Sul

Soil Physical Quality After 21 Years of Cultivation in a Brazilian Cerrado Latosol

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