Carbono Orgânico Total E Agregação Do Solo Em Sistema De Plantio Direto Agroecológico E Convencional De Cebola

Loss, Arcângelo; Basso, Alex; Oliveira, Bruno L.; Koucher, Leoncio de Paula; Oliveira, Rodolfo Assis de; Kürtz, Claudinei; Lovato, Paulo Emílio; Curmi, Pierre; Brunetto, Gustavo; Comin, Jucinei José

doi:10.1590/01000683rbcs20140718

Cited by 66 publications

(110 citation statements)

References 36 publications

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“…However, Loss et al (2015) showed significant differences in aggregation between soils managed under CTS and NTSH, especially in the formation of macroaggregates (8.00 mm > Ø ≥ 2.0 mm). Thus, the use of undisturbed soil samples is important to better assess the effects of management systems in evaluations of HS contained in aggregates of the soil.…”

Section: Nitrogen and Humic Substances In Onion Under No-tillage And mentioning

confidence: 91%

“…The experiment was carried out in a Humic Cambisol (Inceptisol) of clay loam texture (Loss et al, 2015), with 380 g kg -1 clay, 200 g kg -1 silt and 420 g kg -1 sand. The area was cultivated with onion in CTS (plowing, harrowing and scarification) for about 20 years until 1996.…”

Section: Methodsmentioning

confidence: 99%

“…soil organic matter (SOM), thus improving edaphic attributes (Briedis et al, 2012;Loss et al, 2014;2015). The use NTSH is a developing management strategy and differs from the current NTS in technological and social aspects, including the non-use of herbicides and the social bias, since this practice has potential for the development of sustainable agriculture (Fayad and Mondardo, 2004;Menezes et al, 2013).…”

Section: Nitrogen and Humic Substances In Onion Under No-tillage And mentioning

confidence: 99%

“…The soil loses its stability, its macroaggregates fragmentate (Loss et al, 2015), and the SOM within its aggregates decompose (Six et al, 2000) due to the conditions in management systems with frequent turning of the soil, such as CTS. However, more conservative systems that prioritize the contribution of organic residues and less soil turning, such as NTSH, have been efficient in maintaining the soil N contents, preserving its quality (Zibilske et al, 2002;Lovato et al, 2004;Assis et al, 2006).…”

Section: Nitrogen and Humic Substances In Onion Under No-tillage And mentioning

confidence: 99%

“…This soil preparation increases the occurrence of erosive processes and changes edaphic attributes, decreasing nutrient availability to plants and soil organic matter content (Loss et al, 2015). CTS is an important system for food, fiber and energy production, however, it impacts the soil; thus, the search for soil management and conservation practices has been a constant challenge.…”

Section: Introductionmentioning

confidence: 99%

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Nitrógeno total y sustancias húmicas en agregados del suelo cultivado con cebolla bajo siembra directa y preparación convencional

Santos¹,

Loss²,

Lourenzi³

et al. 2018

Rev. Colomb. Cienc. Hortic.

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Total nitrogen and humic substances in aggregates of soils with onion crops under no-tillage and conventional tillage systems Nitrógeno total y sustancias húmicas en agregados del suelo cultivado con cebolla bajo siembra directa y preparación convencional ABSTRACTThe objective of this study was to evaluate the soil total nitrogen (TN), and N contents in humic substances (HS) of the organic matter in aggregates of soils cultivated with onion under no-till system for horticulture (NTSH) and conventional tillage system (CTS), comparing with an area of forest. The evaluated treatments were natural vegetation (control), 100% black oats, 100% rye, 100% oilseed radish, intercrop of oilseed (14%) + rye (86%), intercrop of oilseed (14%) + black oats (86%), area under CTS of onion for ±37 years, and area with secondary forest for ±30 years. Five years after the NTSH implementation, undisturbed soil samples from the layers 0-5 cm, 5-10 cm, and 10-20 cm were collected; these samples presented aggregate sizes between 2.0 mm and 8.00 mm. The TN, and N contents of the HS were subdivided into fulvic acids (N-FA), humic acids (N-HA), and humin (N-HU) fractions. The change from CTS to NTSH increases the TN and N-HU contents in the 0-5 cm soil layer. The intercrop of oats and oilseed radish, used as soil plant cover species in NTSH, presented a greater increase in N-HU (0-20 cm) than the other treatments. Black oats, and natural Onion (Allium cepa L.) crops cover an area of approximately 60,000 ha annually in Brazil, producing approximately 1.6 million t of onion bulbs (IBGE, 2017). The southern region of the country produces 49% of the national production, where the state of Santa Catarina (SC) stands out as the largest national producer since 1990, with a profitable production that has becoming more sustainable due to organic production studies (ACATE, 2014).Soil conventional tillage system (CTS) is the most used system for onion crops in SC, comprising frequent turning of the soil (plowing, harrowing, subsoiling or scarification) in the preparation of the soil of the planting bed (Menezes et al., 2013). This soil preparation increases the occurrence of erosive processes and changes edaphic attributes, decreasing nutrient availability to plants and soil organic matter content (Loss et al., 2015). CTS is an important system for food, fiber and energy production, however, it impacts the soil; thus, the search for soil management and conservation practices has been a constant challenge. No-till system for horticulture (NTSH) has stood out as a promising alternative for onion crops (Menezes et al., 2013). Soil turning in NTSH is done only in the planting line, and cover plants are used for the production and maintenance of plant residues on the soil. This practice maintains or increases the vegetation presented a greater increased in N-HA, and N-FA contents, respectively, in the 10-20 cm layer, than the other treatments in NTSH and CTS. CTS with millet as soil plant cover presented a greater increase in N-FA (0-20 cm) contents tha...

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Section: Nitrogen and Humic Substances In Onion Under No-tillage And mentioning

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Section: Nitrogen and Humic Substances In Onion Under No-tillage And mentioning

confidence: 99%

Section: Nitrogen and Humic Substances In Onion Under No-tillage And mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nitrógeno total y sustancias húmicas en agregados del suelo cultivado con cebolla bajo siembra directa y preparación convencional

Santos¹,

Loss²,

Lourenzi³

et al. 2018

Rev. Colomb. Cienc. Hortic.

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Soil Health in No‐tillage Vegetable Production Systems— SPDH

Comin,

Vezzani,

Souza

et al. 2024

Soil Health Series: Volume 3 Soil Health and Sustainable Agriculture in Brazil

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Long fallows allow soil regeneration in slash‐and‐burn agriculture

et al. 2019

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BACKGROUND: Slash-and-burn is a typical soil management system in tropical regions, in which the use of fire and the fallow time are key factors for controlling the dynamics of the physical and chemical attributes of the soil. The present study evaluated the ability of the fallow period to regenerate the soil, making it similar to the soil of a mature native forest, and compared it with other agricultural soils using a slash-and-burn chronosequence. Soil samples (0-5, 5-10 and 10-20 cm) were collected in areas with slash-and-burn agriculture [2-year crop (cassava); 10 and 15-years fallow] and in nearby areas with eucalyptus forest plantation, agroforestry system and mature native forest. RESULTS: Slash-and-burn agriculture does not alter soil bulk density; however, it reduces aggregate geometric mean diameter (GMD). A 15-year fallow can restore the GMD to values similar to those other areas. The sensitivity index of GMD shows the improvement of aggregation after a 15-year fallow. Total organic carbon decreases in a 2-year crop but increases in a 10-year fallow. A 15-year fallow increases particulate organic carbon and mineral-associated organic carbon compared to a 2-year crop. Total nitrogen, particulate nitrogen and mineral-associated nitrogen decrease in the years following the burning but increase throughout a 15-year fallow.CONCLUSION: The results of the chemical and physical attributes evaluated indicate that a fallow period of 15 years or more after a crop cycle in slash-and-burn agriculture can restore the original soil conditions. The soil quality conservation in the slash-and-burn agriculture is superior to that of continued cultivation of agricultural crops, or monoculture plantations.

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Carbono Orgânico Total E Agregação Do Solo Em Sistema De Plantio Direto Agroecológico E Convencional De Cebola

Cited by 66 publications

References 36 publications

Nitrógeno total y sustancias húmicas en agregados del suelo cultivado con cebolla bajo siembra directa y preparación convencional

Nitrógeno total y sustancias húmicas en agregados del suelo cultivado con cebolla bajo siembra directa y preparación convencional

Soil Health in No‐tillage Vegetable Production Systems— SPDH

Long fallows allow soil regeneration in slash‐and‐burn agriculture

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