Analysis of organic fractions as indicators of soil quality under natural and cultivated systems

Duval, Matías Ezequiel; Galantini, Juán Alberto; Iglesias, Julio Osvaldo; Canelo, Silvia; Martínez, Juan Manuel; Wall, Luis Gabriel

doi:10.1016/j.still.2013.03.001

Cited by 108 publications

(86 citation statements)

References 45 publications

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“…In addition, the continuous application of residues improves the soil environment for root growth because it promotes the formation of unstable aggregates by increasing the free light fraction of organic matter [18]. Results of Mulumba and Lal [20] confirmed that mulch application increased total porosity, soil aggregation, and moisture content in field moisture capacity.…”

Section: Use Of Leguminous Residues and Gypsum For Enhancing Tropicalmentioning

confidence: 83%

“…Some authors have recommended enhancing the soil environment for root growth in no-tillage systems and in soil covered with a residue such as mulch [18,19]. This practice has been recommended because a protective layer of mulch absorbs raindrop impact and reduces evaporation from the soil surface, which may delay hardsetting, as reported by Moura et al [2].…”

Section: Use Of Leguminous Residues and Gypsum For Enhancing Tropicalmentioning

confidence: 99%

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Improving Farming Practices for Sustainable Soil Use in the Humid Tropics and Rainforest Ecosystem Health

et al. 2016

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Abstract:Unsustainable farming practices such as shifting cultivation and slash-and-burn agriculture in the humid tropics threaten the preservation of the rainforest and the health of the local and global environment. In weathered soils prone to cohesion in humid tropic due to low Fe and carbon content and the enormous amounts of P that can be adsorbed, sustainable soil use is heavily dependent on the availability and efficient use of nutrients. This paper reviews the literature in the field and provides some insights about sustainable soil use in the humid tropics, mainly for the Brazilian Amazonia region. Careful management of organic matter and physical and chemical indicators is necessary to enhance root growth and nutrient uptake. To improve the rootability of the arable layer, a combination of gypsum with continuous mulching to increase the labile organic matter fraction responsible for the formation of a short-lived structure important for root growth is recommended, rather than tillage. Unlike mulching, mechanical disturbance via ploughing of Amazonian soils causes very rapid and permanent soil organic matter losses and often results in permanent recompaction and land degradation or anthropic savannization; thus, it should be avoided. Unlike in other regions, like southeast Brazil, saturating the soil solely with inorganic potassium and nitrogen soluble fertilizers is not recommended. Nutrient retention in the root zone can be enhanced if nutrients are added in a slow-release form and if biologically mediated processes are used for nutrient release, as occurs in green manure. Therefore, an alternative that favors using local resources to increase the supply of nutrients and offset processes that impair the efficiency of nutrient use must be pursued.

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Section: Use Of Leguminous Residues and Gypsum For Enhancing Tropicalmentioning

confidence: 83%

Section: Use Of Leguminous Residues and Gypsum For Enhancing Tropicalmentioning

confidence: 99%

Improving Farming Practices for Sustainable Soil Use in the Humid Tropics and Rainforest Ecosystem Health

et al. 2016

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“…Compared to natural systems, the lack of organic amendment and conventional tillage often lead to lower SOC pools in agricultural production systems (Duval et al 2013;Sharma et al 2014). However, we found that C sequestration in CK, in which no Note: Values represent means with the standard deviation in parentheses (n = 3).…”

Section: Soc and Its Labile Fractionsmentioning

confidence: 87%

Soil organic carbon and microbial community structure exhibit different responses to three land use types in the North China Plain

Guo

Chen

Wang

et al. 2015

Acta Agriculturae Scandinavica, Section B — Soil & Plant Sc

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Soil organic carbon plays an important role in soil fertility and carbon sequestration. In the North China Plain, soil nutrients and organic carbon are still lacking in salt-affected soil after a successfully reclamation in the 1980s. Our objectives were to investigate the effects of land use types under different soil management practices on soil fertility, organic carbon pools, and the microbial community at this site. Three land use types were investigated: original land without farming, farmland with residue return, and a vegetable greenhouse with farmyard manure amendment. The carbon stocks were calculated according to the equivalent soil mass method, and microbial community structure was determined by phospholipid fatty acid analysis. Over 30 years, the current concentrations of alkali-hydrolysis nitrogen, available potassium (AK), and available phosphorus increased in the three land use types, except for the AK concentration in farmland, which decreased due to the lack of potassium fertilizer input. The nutrients in the greenhouse were significantly higher than those in the original land and farmland. The carbon stocks in the original land, farmland, and greenhouse were increased by 103%, 179%, and 660%, respectively. Both land use types and seasons influenced particulate organic carbon, chemical-labile organic carbon, and microbial biomass carbon. The microbial community structures were distinctly different between the three land use types. Overall, the soil available nutrients and carbon stocks increased compared to their 1980 levels in the three land use types, and labile carbon pools and microbial community structure exhibited different responses in the three land use types. Compared to spontaneous development, mineral fertilization and organic amendment are more effective for recovering soil fertility in reclaimed soils.

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“…As it was explained in Chapter 2, POC is often related to soil quality and particle aggregation (Duval et al, 2013;Six et al, 2002) and to a higher sensitivity to management changes than SOC (Blavet et al, 2009). Nevertheless, in this study, POC responded similarly to MOC and SOC which could be explained because the measurements included in Chapter 2 were taken 3 years after the GC establishment and a fraction of POC was naturally humified becoming more stable organic carbon (MOC).…”

Section: Gc Influence On Soil Parametersmentioning

confidence: 64%

“…Additionally, there is not a standard of soil sampling depth to calculate SOC stocks or sequestration rates. CB increased POC stocks in 0.8 Mg ha -1 and CS did in 1.5 Mg ha -1 in relation to T. The increase in POC was been widely addressed in the literature as an improvement in soil quality (Duval et al, 2013). Moreover, though most of the soil organic carbon belongs to the stable fraction (MOC) GC increased relatively more POC stocks than MOC with a maximum of 46 % for CS.…”

Section: Discussionmentioning

confidence: 99%

Groundcover influence on physical and chemical soil properties, runoff and nutrient loss and grape yield and quality in semiarid Mediterranean vineyards

Díaz¹

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Analysis of organic fractions as indicators of soil quality under natural and cultivated systems

Cited by 108 publications

References 45 publications

Improving Farming Practices for Sustainable Soil Use in the Humid Tropics and Rainforest Ecosystem Health

Improving Farming Practices for Sustainable Soil Use in the Humid Tropics and Rainforest Ecosystem Health

Soil organic carbon and microbial community structure exhibit different responses to three land use types in the North China Plain

Groundcover influence on physical and chemical soil properties, runoff and nutrient loss and grape yield and quality in semiarid Mediterranean vineyards

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