Impact of no-till and reduced tillage on aggregation and aggregate-associated carbon in Northern European agroecosystems

Sheehy, Jatta; Regina, Kristiina; Alakukku, Laura; Six, Johan

doi:10.1016/j.still.2015.01.015

Cited by 156 publications

(109 citation statements)

References 45 publications

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“…Contrary to the lower stability of microaggregates associated to coarse soils observed by Sheehy et al (2015), there was a very strong correlation between the WSA and the Sand proportion (r = 0.97). Thence a stability reduction occurred in samples RF4 and RF5 when the percentage of finer particles rose (Table 2).…”

Section: Physicochemical Characterizationcontrasting

confidence: 80%

Effect of glyphosate application on soil quality and health under natural and zero tillage field condition

Romano-Armada¹,

Amoroso²,

Rajal³

2017

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Section: Physicochemical Characterizationcontrasting

confidence: 80%

Effect of glyphosate application on soil quality and health under natural and zero tillage field condition

Romano-Armada¹,

Amoroso²,

Rajal³

2017

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“…Despite the variability in OC fixation due to heterogeneity of soil matrices, and site conditions, and inherent randomness of representative samplings, the carbon sequestered in bulk soil by the photo‐activity of the iron‐porphyrin catalyst for three consecutive years reached an average of 3.54, 3.90, and 2.24 Mg ha −1 y −1 for the Torino, Piacenza, and Napoli experimental sites, respectively (Table ). These significant yearly amounts of fixed SOC were achieved under conventional tillage management, whereas the current highly experimented NT or RT practices are far from reaching such a large OC increase in cropped bulk soils even after several years, whether under boreal North European (Sheehy, Regina, Alakukku, & Six, ) or Mediterranean (Garcia‐Franco, Albaladejo, Almagro, & Martínez‐Mena, ) agroecosystems.…”

Section: Resultsmentioning

confidence: 99%

Effective carbon sequestration in Italian agricultural soils by in situ polymerization of soil organic matter under biomimetic photocatalysis

et al. 2018

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Facing an exploding population growth with consequent increase of agriculture intensification, new chemical technologies are being sought to limit organic matter losses and reduce land degradation. Here, we report that an effective organic carbon sequestration in different cropped soils of Italy is obtained by an in situ photo‐oxidative coupling among soil humic molecules, when catalyzed under solar irradiation by a water‐soluble biomimetic iron‐porphyrin catalyst amended to field soils. A 3‐year long field study showed that the catalyst‐assisted in situ photochemical polymerization of humic matter enabled a yearly sequestration of soil organic carbon that ranged from 2.2 to 3.9 t ha−1 y−1, despite the periodical soil disturbance due to a conventional tillage management. This significant stabilization of organic matter was observed not only in bulk soils but also in water‐stable aggregates, whose loss of organic carbon during separation was limited in catalyst‐treated soils. Although crop yields were the same in treated and control soils, measurements of phospholipids fatty acids and soil enzyme activities indicated that the catalyzed in situ photo‐oxidative coupling of humic molecules did not alter the structure and activity of microbial communities and the biological functions of soils. This innovative and ecologically safe catalytic technology may be developed as a useful soil management practice to stabilize organic matter in situ in arable soils, while concomitantly ensuring soil functions and sustainability of crop production.

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“…The results for the BD, TP and Mi are ascribed to: (i) the increase in the crop residue and soil organic carbon at the surface layer (NT) (Hickmann & Costa, 2012) and (ii) the formation and stabilization of biopores as a consequence of the absence of the soil disturbance in NT compared with CT (Kautz, 2014). In the absence of soil tillage, the increase in the soil organic carbon and the biopores improved the soil aggregation (Fernández-Ugalde et al, 2009;Sheehy et al, 2015), making the soil less dense and more porous (Cássaro et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Influence of physical attributes and pedotransfer function for predicting water retention in management systems

Auler

Pires

Pineda

2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe aims of this study were to evaluate the effects of the soil structural physical attributes on the water retention and to develop pedotransfer functions (PTFs) for the estimation of the soil water content (θ) at different matric potentials of a Dystrophic Red Latosol (Hapludox) under conventional tillage (CT) and no-tillage (NT) soil management systems. The effects of long-term CT and NT (over 25 years) management on the soil bulk density (BD), total porosity (TP), macroporosity (Ma), microporosity (Mi) and water retention were investigated. The PTFs were developed to predict θ and used to evaluate the soil water retention curve only for the NT system. The NT system was characterized by smaller values of the soil BD and higher values of the soil TP and Mi than the CT system. The NT system exhibited a higher θ retained than the CT system for the pore-size interval of 0.2-30 µm. However, the CT system exhibited a large amount of water retention for pores smaller than 0.2 µm. The PTFs were utilized to estimate θ at matric potentials of -1, -3, -6, -10, -33, -100, -400, -800, and -1,500 kPa with adequate accuracy. The soil BD, Ma, Mi and sand content were the main variables considered to estimate θ for the different matric potentials evaluated.Atributos físicos e funções de pedotransferência para estimativa da retenção de água em sistemas de manejo R E S U M OOs objetivos deste estudo foram avaliar os efeitos de atributos físicos estruturais do solo sobre a retenção de água e desenvolver funções de pedotransferência (FPT) para a estimativa de conteúdos de água (θ) em diferentes potenciais mátricos de um Latossolo Vermelho distrófico em sistema convencional (SC) e sistema plantio direto (SPD). Os efeitos de longo prazo dos manejos SC e SPD (mais de 25 anos) sobre a densidade do solo (DS), porosidade total (PT), macroporosidade (Ma), microporosidade (Mi) e retenção de água foram investigados. As FPT foram desenvolvidas para predizer os θs utilizados na determinação da curva de retenção de água apenas para o SPD. O SPD apresentou menor DS e maior PT e Mi que o SC. O SPD aumentou o conteúdo de água retido em poros de tamanho entre 0,2 e 30 µm, em relação ao SC. No entanto, o SC apresentou maior conteúdo de água retido em poros com raio menor que 0,2 µm. As FPTs utilizadas para estimar θ para os potenciais mátricos de -1, -3, -6, -10, -33, -100, -400, -800 e -1500 kPa tiveram acurácia adequada. A DS, Ma, Mi e teor de areia foram as principais variáveis consideradas para estimar o conteúdo de água nesses potenciais mátricos. Key words:no-tillage conventional tillage soil porosity Palavras-chave: sistema plantio direto sistema plantio convencional porosidade do solo

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Impact of no-till and reduced tillage on aggregation and aggregate-associated carbon in Northern European agroecosystems

Cited by 156 publications

References 45 publications

Effect of glyphosate application on soil quality and health under natural and zero tillage field condition

Effect of glyphosate application on soil quality and health under natural and zero tillage field condition

Effective carbon sequestration in Italian agricultural soils by in situ polymerization of soil organic matter under biomimetic photocatalysis

Influence of physical attributes and pedotransfer function for predicting water retention in management systems

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