Effect of pasture improvement managements on physical properties and water content dynamics of a volcanic ash soil in southern Chile

Ordóñez, Iván; López, Ignacio F.; Kemp, Peter; Descalzi, C.; Horn, Rainer; Zúñiga, Felipe; Dec, Dorota; Dörner, José

doi:10.1016/j.still.2017.11.013

Cited by 30 publications

(33 citation statements)

References 52 publications

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“…Three management practices were considered. The first site referred to as 'initial situation' (Ordóñez et al, 2018;as 'NsF' in Salas et al, 2016;or as T3 in Zúñiga et al, 2015) corresponds with a 'non-fertilized naturalized pasture (NFNP)' was neither fertilized nor limed. The vegetation was not sown but spontaneously grown.…”

Section: Soil Materialsmentioning

confidence: 99%

“…25 sheep (Finnish Landrace x Romney Marsh) grazed on each plot (equivalent to 625 sheep ha -1 ). For more details about grazing criteria, earlier botanical composition and detailed soil parameter see Parga et al (2007), Flores et al (2017), Descalzi (2017) and Ordóñez et al (2018).…”

Section: Soil Materialsmentioning

confidence: 99%

“…Over 44% of these pastures are degraded and relatively low in productivity (4,000 kg dry matter ha -1 year -1 ) if compared to pastures with e.g., moderate nitrogen fertilization (Lobos et al, 2016). Various strategies have been implemented to improve these grasslands (Zúñiga et al, 2015) which result in alterations within the plantsoil-atmosphere-continuum (Ordóñez et al, 2018). The soil structure can be negatively modified (Krümmelbein et al, 2006) depending on the pasture improvement management (PIMs) affecting the soil capacity to store and to conduct water and air (Zúñiga et al, 2015;Ordóñez et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Various strategies have been implemented to improve these grasslands (Zúñiga et al, 2015) which result in alterations within the plantsoil-atmosphere-continuum (Ordóñez et al, 2018). The soil structure can be negatively modified (Krümmelbein et al, 2006) depending on the pasture improvement management (PIMs) affecting the soil capacity to store and to conduct water and air (Zúñiga et al, 2015;Ordóñez et al, 2018). In these terms, both Dörner et al (2013) and Ordóñez et al (2018), assessed that pasture grasses on less mechanically disturbed volcanic ash soils are more efficient to uptake water from the soil during drought periods, highlighting the relevance of soil structure conservation for pasture management.…”

Section: Introductionmentioning

confidence: 99%

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Permeabilidad y difusión de aire en el subsuelo de un Andisol sujeto a distintas estrategias de mejoramiento de praderas

Haas¹,

Horn²,

Gerke³

et al. 2018

agrosur

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In southern Chile, grazing systems over volcanic ash soils play an important role for the development of the region. The productivity of these grazing systems should be improved by Pasture Improvement Strategies (PIMs), which in the case of the present study were established 5 years before this analysis. Often topsoil properties were measured while those for describing the functioning of the pore system (e.g., air permeability) in the subsoil (> 0.45 m) are missing. For subsoil samples, these parameters were determined to compare the long-term effect of three PIMs (i.e., NFNP: not-fertilized and not-ploughed, FNP: fertilized but not-ploughed or fertilized and CP: ploughed). Two depth intervals (D1: 0.45-0.55 m, D2: 0.55-0.65 m) within the same subsoil horizon of a Duric Hapludand were considered. Results show that the subsoil was influenced by tillage. The transformation to an improved pore system was e.g. indicated by increased means of pore indices (C 3) for FNP (123.5%) and CP (46%) as compared to NFNP for D1 (Ψ m =-6 kPa). The soil air diffusivity values in these subsoil samples were in a range comparable to those reported for non-volcanic but sandy soils in Europe and were generally larger in D2 than in D1. We concluded that soil properties were still in transition to a new equilibrium. Thus, measurements of subsoil properties should be repeated in time intervals to better understand gas transport processes in cultivated Chilean soils that origin from volcanic ash.

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Section: Soil Materialsmentioning

confidence: 99%

Section: Soil Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Permeabilidad y difusión de aire en el subsuelo de un Andisol sujeto a distintas estrategias de mejoramiento de praderas

Haas¹,

Horn²,

Gerke³

et al. 2018

agrosur

View full text Add to dashboard Cite

show abstract

“…The grass species are selectively grazed on Spring time, which has a close relationship to a high crude protein content and tillering increase. However, sheep under available pasture restriction, for example during Summer when the growth rate of the fast growing grass species has diminished due to the soil water restriction [13], the selection pressure is on broad leaf species because these species may have enough water soluble carbohydrate content to be palatable [14]. Several studies focused on sheep grazing behavior showed a pasture structure with a decreased broad leaf species while grasses and legumes species increased [15][16][17][18][19][20].…”

Section: Opinionmentioning

confidence: 99%

Untitled

2017

APAR

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Inorganic Nitrogen diffusion in undisturbed volcanic soils during continuous drying–rewetting cycles

Clunes

Deltedesco

Pinochet

et al. 2020

J. Plant Nutr. Soil Sci.

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Background and aim: The diffusion of inorganic nitrogen (N) in soils is strongly affected by their physical characteristics and hydraulic gradients, which enable them to store and transport nutrients over time and space. The objective of this research was to use the microdialysis technique to continuously monitor the diffusive fluxes of inorganic N from the physical N store towards root surfaces in two volcanic soils after soil rewetting.Methods: Undisturbed soil samples were collected in metallic cylinders (230 cm3) at four depths (0–20, 20–40, 40–70, 70–100 cm) in two distinct volcanic soils (Andisol and Ultisol) that are used in agriculture. Diffusive N fluxes were determined during continuous drying and rewetting cycles (0 to 100 kPa) of intact undisturbed soil cores. Soil water content (SWC) at each water potential was calculated.Results and Conclusions: Diffusive fluxes increased significantly (p < 0.001) after rewetting in both soils: 16‐fold in the Andisol, from 32.7 ± 12.1 to 541.5 ± 306.5 nmol N cm−2 h−1 (34 to 62% SWC) and 66‐fold in the Ultisol, from 65.6 ± 25.8 to 4298.7 ± 1289.9 nmol N cm−2 h−1 (31 to 58% SWC) in the upper 20 cm of the soils. In addition, diffusive fluxes decreased with depth in both soils. We found that the residence time of available in these soils strongly depended upon actual SWC and thereby the functionality of the pores in the system. We propose that the ability of the porous system to transport water throughout the soil profile is a relevant parameter within N diffusion, since it allows us to estimate the increase or decrease of diffusive fluxes as a function of the soil water content during continuous drying and rewetting cycles.

show abstract

Effect of pasture improvement managements on physical properties and water content dynamics of a volcanic ash soil in southern Chile

Cited by 30 publications

References 52 publications

Permeabilidad y difusión de aire en el subsuelo de un Andisol sujeto a distintas estrategias de mejoramiento de praderas

Permeabilidad y difusión de aire en el subsuelo de un Andisol sujeto a distintas estrategias de mejoramiento de praderas

Untitled

Inorganic Nitrogen diffusion in undisturbed volcanic soils during continuous drying–rewetting cycles

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