Soil organic matter in biogenic, intermediate and physicogenic aggregates under agroecological management

Rossi, Celeste Queiroz; Pinto, Luiz Alberto da Silva Rodrigues; Moura, Octávio Vioratti Telles de; Loss, Arcângelo; Pereira, Marcos Gervásio

doi:10.1590/1983-21252023v36n118rc

Cited by 4 publications

References 22 publications

(48 reference statements)

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Soil Organic Matter Fractions in Shaded Agroforestry Versus Unshaded Coffee Plantation

Wanjala,

Negash,

Zech

et al. 2024

Preprint

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Soil Organic Matter Fractions in Shaded Agroforestry Versus Unshaded Coffee Plantation

Wanjala,

Negash,

Zech

et al. 2024

Preprint

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Evolution of Soil Chemical Fertility in an Area under Recovery for 30 Years with Anthropic Intervention

Lourencetti,

Bonini,

Andreotti

et al. 2023

Sustainability

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The investigation and application of recovery techniques associated with the use of qualitative and quantitative indicators enable the ecological restoration of these sites. In this context, the main difficulty consists of establishing the A horizon, capable of supporting the emergence of other horizons, choosing appropriate species, and adding organic matter to the soil in a balanced way. Thus, this study aimed to evaluate over time (1992 to 2022) the chemical properties of a stripped oxisol that has been in the recovery process for 30 years, using liming, gypsum, and plant species. All treatments were cultivated with Urochloa decumbens (Stapf.) in 1999 and tree species in 2010, and the contents of phosphorus, organic matter, pH, and base saturation. ANOVA and Scott–Knott test (5%), Pearson correlation, and response surface analysis were performed for each studied soil attribute. The results showed that the treatments with green manure + limestone + gypsum had the highest values of organic matter compared to the recovery treatments and that the treatments have been efficient in soil recovery. Therefore, the soil undergoing recovery showed an increase in P, OM, pH, and base saturation until 2011, and the response surface method was the most efficient in analyzing the results over time.

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Biogenic and physicogenic aggregates as indicators of quality in soils with sandy texture in areas of organic agriculture

Silva¹,

Morais²,

Santos³

et al. 2023

Revista Brasileira De Ciência Do Solo

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Sandy texture soils have a great expression in agricultural areas worldwide. In the Baixada Fluminense, soils with a sandy texture on the surface horizons are striking, and a good part of these areas is destined for producing vegetables using conventional cultivation methods. The sandy texture is one of the great challenges for agriculture due to the low water retention capacity provided to the soil, the rapid decomposition of organic matter, and the intense loss of nutrients by leaching. In these areas, the action of erosive processes is sometimes observed, whether water or wind erosion. The practices carried out in conventional agriculture can accentuate these processes. This study aimed to evaluate the influence of different soil management systems, with different vegetation covers, on the pathways of aggregate formation, the nutrient contents contained therein, and the organic matter fractions, with the objective of using these properties as indicators of soil quality. The study was carried out in an organic production unit, with no-till system (NT) and conventional system (CT), three vegetal covers were evaluated, namely; seed cocktail 1 (C1) (Crotalaria (Crotalaria juncea) (20 kg ha -1 ), Jack Bean (Canavalia ensiformis) (150 kg ha -1 ) and millet (Pennisetum glaucum) (60 kg ha -1 )), and seed cocktail 2 (C2) (with 50 % of the amount of seeds used in C1), and spontaneous plants (S. P). Undisturbed samples were collected at the layers of 0.00-0.05 and 0.05-0.10 m, and, from these samples, aggregates with a diameter between 9.7 and 8.0 mm were classified according to the formation route (Biogenic or Physicogenic). From these, the chemical properties were quantified (pH, Ca 2+ , Mg 2+ , Al 3+ , P, Na + , K + ), and also the carbon fractions (total organic carbon – TOC, mineral-associated organic carbon – MAOC), particulate organic carbon – POC, and free light fraction carbon – LFC). Based on the results, it was verified that the percentage of biogenic aggregates was higher than the physicogenic one in the layer of 0.00-0.05 m, not being verified influences of the vegetal coverage or the management system. Chemical properties did not differ significantly between training pathways. The CT, for the most part, was the system in which the highest values of chemical properties were observed, and in general, the C2 and S.P coatings were the ones that provided the greatest improvements for chemical properties and carbon content.

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Soil organic matter in biogenic, intermediate and physicogenic aggregates under agroecological management

Cited by 4 publications

References 22 publications

Soil Organic Matter Fractions in Shaded Agroforestry Versus Unshaded Coffee Plantation

Soil Organic Matter Fractions in Shaded Agroforestry Versus Unshaded Coffee Plantation

Evolution of Soil Chemical Fertility in an Area under Recovery for 30 Years with Anthropic Intervention

Biogenic and physicogenic aggregates as indicators of quality in soils with sandy texture in areas of organic agriculture

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