Climatic influences on active fractions of soil organic matter

Franzluebbers, Alan J.; Haney, Richard L.; Honeycutt, C. Wayne; Arshad, Muhammad; Schomberg, Harry H.; Hons, Frank M.

doi:10.1016/s0038-0717(01)00016-5

Cited by 164 publications

(90 citation statements)

References 32 publications

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“…The soil-climate-texture relations provide a context for considering mechanisms and processes that determine soil C and N pools, such as soil respiration associated with soil C pools and intraannual climate patterns (Conant et al 1998), multiple mechanisms by which organic matter is stabilized by clays (Hassink et al 1993;Plante et al 2006), and relations of different soil organic fractions to climate and particle-size fractions (Amelung et al 1997(Amelung et al , 1998Franzluebbers et al 2001). However, as with other broad-area statistical studies of controls on SOC and soil N (Burke et al 1989;Dai and Huang 2006;Grigal and Ohmann 1992;Homann et al 1995), our relations do not necessarily indicate direct cause-and-effect associations.…”

Section: Texture Relationsmentioning

confidence: 99%

Relations of mineral-soil C and N to climate and texture: regional differences within the conterminous USA

2007

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Soil is a prominent component of terrestrial C and N budgets. Soil C and N pools are influenced by, and may reciprocally influence, many environmental factors. Our objective was to determine the quantitative relations of surface mineral-soil organic C, N, and C/N ratios to climate and soil texture across seven ecological regions that make up the conterminous USA. Up to 608 soil profiles per region and their corresponding climates were evaluated with regression analysis. The organic C pool (kg C m À2 ) in the upper 20 cm of mineral soil was positively related to mean annual precipitation, evapotranspiration and clay content in all regions. It was negatively related to a temperature/precipitation index in all regions and negatively related to mean annual temperature, except in the northwest temperate forest region. Soil C/N ratios were negatively related to clay or silt content in all regions. These relations are consistent with concepts of moisture and temperature controls on detrital production, differential effects of temperature on detrital production and decomposition, and stabilization of organic matter by clay and silt.Differences in quantitative relations among regions may be related to vegetation-composition effects on soil organic matter processes, clay mineralogy, and faunal mixing of surface organic horizons with mineral soil. Regional differences also occurred in the importance of climate vs. soil texture in explaining the variability in soil C. The regional differences indicate the importance of using region-specific, rather than generalized, equations for projecting long-term soil responses to climate change and for conducting ecosystem-model calibration or validation.

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Section: Texture Relationsmentioning

confidence: 99%

Relations of mineral-soil C and N to climate and texture: regional differences within the conterminous USA

2007

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“…Variations in temperature and humidity can cause temporal changes in soil aggregation, which can affect soil microbial activity, arrangement of the soil particles, an increase in the isolation of organic carbon within the aggregates, changes in expansion and contraction cycles, and stability of aggregates (Franzluebbers et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

The aggregates stability indicator <ASItest> to evaluate soil spatiotemporal change in a tropical dry ecosystem

Martínez-Trinidad

Cotler

Cruz-Cárdenas

2012

J. Soil Sci. Plant Nutr.

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In this work, aggregate stability was evaluated as a quality indicator in soils of tropical dry deciduous forests (TDF) with relation to land use, the sampling position in the hillslope and the sampling season. The study was done on a representative morpho-edaphological unit of the tropical dry ecosystems (hillslope on granite with eutric regosol) on the coast of the state of Jalisco, Mexico. The evaluated soil aggregation indexes were: Aggregate stability index (ASI)test, maximum stability, minimum stability, relative index of variability, and the index of quality of aggregation change. These indexes showed differences in soil aggregation resulting from changes in land use (conserved TDF, grazed TDF, and cultivated pasture). The indexes showed that there is greater stability of the aggregates during the rainy season than in the dry season; as well as in the higher part of the slope than in the lower one. The relationship of the edaphic properties with the ASItest indicator was mainly with radical volume, and less so with exchangeable bases (calcium and magnesium), clay, and organic carbon. The proposed soil aggregation indexes allowed monitoring spatiotemporal changes in soil structure.

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“…Vegetal debris contributes to soil organic carbon which plays an important role in soil functions: it has nutrient and pollutant retention capacity, it improves soil structure and stability and it is source of nutrients and substrate for soil microbial community (Nambiar 1997;Vallejo et al 2005) and has influence over their distribution and activity. Furthermore, biologically active fractions of soil organic matter are important in understanding decomposition potential of organic materials, nutrient cycling dynamics, and biophysical manipulation of soil structure (Franzluebbers et al 2001). In this way, soluble organic carbon is a useful tool as it represents the fraction easily decomposable by microorganisms and is closely related with microbial growth and activity (Jandl and Sollins 1997).…”

Section: Introductionmentioning

confidence: 99%

Influence of plant species on physical, chemical and biological soil properties in a Mediterranean forest soil

et al. 2008

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In semiarid ecosystems plant cover plays an important role in the improvement of physical, chemical and biochemical soil properties. With the aim of studying the influence of different plant species on soil properties, and establishing the relationships between them, 160 soil samples from under four different plant species (Pinus halepensis, Quercus coccifera, Juniperus oxycedrus and Rosmarinus officinalis) were taken in a forest area of the province of Alicante (SE Spain). The following soil properties were analyzed in all soil samples: organic carbon content, microbial biomass, soluble organic carbon, aggregate stability, basal respiration, and some eco-physiological ratios. In addition, the near infrared spectra (NIR) of all soil samples were obtained to verify the similarities or differences between soil samples under the four species. Some differences in parameters such as organic carbon content or basal respiration were found mainly between the group of P. halepensis and Q. coccifera with respect to J. oxycedrus and R. officinalis. Despite this, the high organic carbon content found under the four plant species showed an influence on the rest of soil properties. Moreover, using a discriminant analysis with factorial scores from NIR absorbance data did not result in a good classification of samples in terms of the species, reflecting some similarities between them. Our results show that the high contents observed in some parameters under the four species, and the lack of significant differences in most of them, prove the important role of shrubland in semiarid conditions, it being capable of promoting good soil conditions.

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Climatic influences on active fractions of soil organic matter

Cited by 164 publications

References 32 publications

Relations of mineral-soil C and N to climate and texture: regional differences within the conterminous USA

Relations of mineral-soil C and N to climate and texture: regional differences within the conterminous USA

The aggregates stability indicator <ASItest> to evaluate soil spatiotemporal change in a tropical dry ecosystem

Influence of plant species on physical, chemical and biological soil properties in a Mediterranean forest soil

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Climatic influences on active fractions of soil organic matter

Cited by 164 publications

References 32 publications

Relations of mineral-soil C and N to climate and texture: regional differences within the conterminous USA

Relations of mineral-soil C and N to climate and texture: regional differences within the conterminous USA

The aggregates stability indicator <ASItest&gt; to evaluate soil spatiotemporal change in a tropical dry ecosystem

Influence of plant species on physical, chemical and biological soil properties in a Mediterranean forest soil

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Product

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The aggregates stability indicator <ASItest> to evaluate soil spatiotemporal change in a tropical dry ecosystem