Seasonal dynamics of active soil carbon and nitrogen pools under intensive cropping in conventional and no tillage

Franzluebbers, Alan J.; Hons, Frank M.; Zuberer, D. A.

doi:10.1002/jpln.1996.3581590406

Cited by 17 publications

(6 citation statements)

References 30 publications

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“…In particular, Gagliardi and Karns (2002) employed a higher incubation temperature (25°C, compared with 15°C for the maize cores). Higher temperatures may stimulate plant photosynthetic activity, leading to increased rhizodeposition (Franzluebbers et al. 1996; Pramanik et al.…”

Section: Discussionmentioning

confidence: 99%

Survival of Escherichia coli O157:H7 in the rhizosphere of maize grown in waste-amended soil

et al. 2007

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Aims: To assess whether the persistence of Escherichia coli O157:H7 in soil amended with cattle slurry and ovine stomach content waste is affected by the presence of a maize rhizosphere. Methods and Results: Cattle slurry and ovine stomach content waste were inoculated with E. coli O157:H7. Wastes were then applied to soil cores with and without established maize plants. The pathogen survived in soil for over 5 weeks, although at significantly greater numbers in soil receiving stomach content waste in comparison to cattle slurry. Persistence of the pathogen in soil was unaffected by the presence of a rhizosphere. Conclusions: Other factors may be more influential in regulating E. coli O157:H7 persistence in waste‐amended soil than the presence or absence of a rhizosphere; however, waste type did have significant affect on the survival of E. coli O157:H7 in such soil. Significance and Impact of the Study: Escherichia coli O157:H7 can be present within animal‐derived organic wastes that are routinely spread on land. Introduced measures with regards to such waste disposal may decrease exposure to the organism; however, the persistence of E. coli O157:H7 for considerable periods in waste‐amended soil may still pose some risk for both human and animal infection. This study has shown that whilst survival of E. coli O157:H7 in waste‐amended soil is not significantly affected by the presence or absence of a maize rhizosphere; it may vary significantly with waste type. This may have implications for land and waste management.

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Section: Discussionmentioning

confidence: 99%

Survival of Escherichia coli O157:H7 in the rhizosphere of maize grown in waste-amended soil

et al. 2007

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“…These forms of conventional and deep tillage have also been known to increase organic C mineralisation by changing the distribution of SOM in the soil profile. Franzluebbers et al. (1996) observed that mineralisation increased under conventional tillage compared with no‐till.…”

Section: Saline and Sodic Effects On Soil Organic Carbon Dynamicsmentioning

confidence: 95%

Soil carbon dynamics in saline and sodic soils: a review

Wong

Greene

Dalal³

et al. 2009

Soil Use and Management

359

190

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Soil salinity (high levels of water-soluble salt) and sodicity (high levels of exchangeable sodium), called collectively salt-affected soils, affect approximately 932 million ha of land globally. Saline and sodic landscapes are subjected to modified hydrologic processes which can impact upon soil chemistry, carbon and nutrient cycling, and organic matter decomposition. The soil organic carbon (SOC) pool is the largest terrestrial carbon pool, with the level of SOC an important measure of a soil's health. Because the SOC pool is dependent on inputs from vegetation, the effects of salinity and sodicity on plant health adversely impacts upon SOC stocks in salt-affected areas, generally leading to less SOC. Saline and sodic soils are subjected to a number of opposing processes which affect the soil microbial biomass and microbial activity, changing CO 2 fluxes and the nature and delivery of nutrients to vegetation. Sodic soils compound SOC loss by increasing dispersion of aggregates, which increases SOC mineralisation, and increasing bulk density which restricts access to substrate for mineralisation. Saline conditions can increase the decomposability of soil organic matter but also restrict access to substrates due to flocculation of aggregates as a result of high concentrations of soluble salts. Saline and sodic soils usually contain carbonates, which complicates the carbon (C) dynamics. This paper reviews soil processes that commonly occur in saline and sodic soils, and their effect on C stocks and fluxes to identify the key issues involved in the decomposition of soil organic matter and soil aggregation processes which need to be addressed to fully understand C dynamics in salt-affected soils.

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“…They are all valuable indicators to soil quality and health. (Franzluebbers et al 2000;Franzluebbers, Hons, and Zuberer 1996) The SIR-SMBC procedure presented in this study, however, is the only one that can be conveniently determined in real time and under field conditions. The correlations between the SIR-SMBC and the soil organic matter (Figure 4, r 2 = 0.548) and between SIR-SMBC and the total soil nitrogen ( Figure 5, r 2 = 0.387) are also significant but to a lesser extent as compared with the correlation between the SIR-SMBC and the 10-day incubation mineralized C. These lesser correlations are expected because SMBC is not only a function of the quantity but also the quality of the organic matter and nitrogen.…”

Section: Sir-smbc and The 10-day Incubation Mineralized Carbonmentioning

confidence: 99%

“…It was found that the CO 2 flush after rewetting dried soils could be an indicator of soil microbial mineralization capability (Marumoto, Anderson, and Domsch 1982;Sorensen 1974;Sparling et al 1995). The three-day CO 2 flush after rewetting dried soils was also found to be correlated to soil microbial biomass, active soil carbon pool, and net nitrogen mineralization (Franzluebbers and Haney 2018;Franzluebbers et al 2000;Franzluebbers, Hons, and Zuberer 1996). Soil respiration measurements were usually determined by the exhaustive CO 2 absorption (by alkaline) approach such as alkaline trap-titration (Keeney 1982), Solvita (Haney, Brinton, and Evans 2008) or Draeger tube (Soil Quality Institute 1999) methods.…”

Section: Introductionmentioning

confidence: 96%

Non-instrumental Real-time Soil Respiration Rate and Soil Microbial Biomass Carbon Determinations

Hsieh

Anderson

Miller

et al. 2020

Communications in Soil Science and Plant Analysis

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Seasonal dynamics of active soil carbon and nitrogen pools under intensive cropping in conventional and no tillage

Cited by 17 publications

References 30 publications

Survival of Escherichia coli O157:H7 in the rhizosphere of maize grown in waste-amended soil

Survival of Escherichia coli O157:H7 in the rhizosphere of maize grown in waste-amended soil

Soil carbon dynamics in saline and sodic soils: a review

Non-instrumental Real-time Soil Respiration Rate and Soil Microbial Biomass Carbon Determinations

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