Mineralization-immobilization of sulphur in a soil during decomposition of plant residues of varied chemical composition and S content

Niknahad-Gharmakher, Hamid; Piutti, Séverine; Machet, Jean‐Marie; Benizri, Émile; Recous, Sylvie

doi:10.1007/s11104-012-1230-7

Cited by 26 publications

(13 citation statements)

References 28 publications

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“…Although considered a loss from the pasture ecosystem, harvested DM may be considered a C storage mechanism relative to the atmosphere. By assuming a 43.3% C concentration for harvested DM (Bélanger et al, 1994; Niknahad‐Gharmakher et al, 2012; Sanaullah et al, 2014), 9.7, 12.1, and 22.5 Mg of DM C ha −1 were stored in the unamended control, low‐BL, and high‐BL treatments, respectively, during the 2‐yr period (Table 3). Annual amendments of BL increased DM C storage by 1.3 and 2.3 times that from the control for the low‐BL (241 kg N ha −1 ) and high‐BL (482 kg N ha −1 ) treatments, respectively.…”

Section: Resultsmentioning

confidence: 99%

Soil Respiration as Affected by Long-Term Broiler Litter Application to a Udult in the Ozark Highlands

2015

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The United States produced 8.4 billion broiler chickens () and an estimated 10.1 to 14.3 million Mg of broiler litter (BL) in 2012. Arkansas' production of 1 billion broilers in 2012 produced an estimated 1.2 to 1.7 million Mg of BL, most of which was concentrated in the Ozark Highlands region of northwest Arkansas. Increased CO release from soils associated with agricultural practices has generated concerns regarding the contribution of certain agricultural management practices to global warming. The objectives of this study were to evaluate the effects of long-term (>6 yr) BL application to a Udult on soil respiration and annual C emissions and to determine the predictability of soil respiration based on soil temperature and moisture in the Ozark Highlands region of northwest Arkansas. Soil respiration was measured routinely between May 2009 and May 2012 in response to annual BL application rates of 0, 5.6, and 11.2 Mg dry litter ha that began in 2003. Soil respiration varied ( < 0.01) with BL rate, measurement date, and year. Additions of BL stimulated respiration after application, and rainfall events after dry-soil conditions stimulated respiration in all years. Soil temperature at the 10-cm depth, 0- to 6-cm soil volumetric water content (VWC), and annual CO-C emissions were unaffected ( > 0.05) by BL application rate but differed ( < 0.01) among study years. Multiple regression indicated that soil respiration could be reasonably predicted using 2-cm-depth soil temperature (T) and the product of T and VWC as predictors ( = 0.52; < 0.01). Results indicate that organic amendments, such as BL, can stimulate release of CO from the soil to the atmosphere, potentially negatively affecting atmospheric greenhouse gas concentrations; thus, there may be application rates above which the benefits of organic amendments may be diminished by adverse environmental effects. Improved BL management strategies are needed to lessen the loss of CO from BL-amended soils.

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Section: Resultsmentioning

confidence: 99%

Soil Respiration as Affected by Long-Term Broiler Litter Application to a Udult in the Ozark Highlands

2015

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“…The percentage of compost C mineralized ( C min , %) was estimated by (Chen et al, )

C_{\min} = ([], {Rh}_{compost} - 0.5 \times ((), {Rh}_{UREA} - {Rh}_{CONT}) - {Rh}_{CONT}) / C_{compost} \times 100 %

where Rh compost , Rh UREA , and Rh CONT are the cumulative Rh (g C m −2 ) in the compost treatment, UREA, and CONT, respectively; 0.5 is the ratio of urea‐N application rate in the compost treatment to that of the UREA treatment; and C compost is the amount of organic C input by compost application. This calculation was based on the assumptions that the priming effect induced by OM addition on SOC decomposition is negligible (Johnson et al, ; Niknahad‐Gharmakher et al, ) and that Rh from SOC decomposition was assumed to respond proportionally to N rate at the range of 100–200 kg N ha −1 (Zhong et al, ).…”

Section: Methodsmentioning

confidence: 99%

Soil Respiration Components and their Temperature Sensitivity Under Chemical Fertilizer and Compost Application: The Role of Nitrogen Supply and Compost Substrate Quality

Chen

Castellano

et al. 2019

JGR Biogeosciences

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Understanding autotrophic (Ra) and heterotrophic (Rh) components of soil respiration (Rs) and their temperature sensitivity (Q10) is critical for predictingsoil carbon (C) cycle and its feedback to climate change. In agricultural systems, these processes can be considerably altered by chemical fertilizer and compost application due to changes in nitrogen (N) supply and substrate quality (decomposability). We conducted a field experiment including control, urea, and four compost treatments. Ra and Rh were separated using the root exclusion method. Composts were characterized by chemical analyses, 13C solid‐state nuclear magnetic resonance, and lignin monomers. Annual cumulative Ra, along with root biomass, increased with soil mineral N, while Rh was suppressed by excessive N supply. Thus, Ra was stimulated but Rh was decreased by urea alone application. Annual Rh was increased by application of compost, especially that containing most lignin vanillyl and syringyl units, O‐alkyl C, di‐O‐alkyl C, and manganese. However, during the initial period, Rh was most effectively stimulated by the compost containing most carbohydrates, lignin cinnamyl units, phenolic C, and calcium. Ra was mediated by N release from compost decomposition and thus exhibited similar responses to compost quality as Rh. The Rh Q10 was reduced, while Ra Q10was increased by chemical fertilizer and compost application. Moreover, the Rh Q10 negatively related to soil mineral N supply and compost indicators referring to high substrate quality. Overall, our results suggest that N supply and substrate quality played an important role in regulating soil C flux and its response to climate warming.

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“…Similarly to the calculation of the C:N ratio in plant debris, in order to determine the amount of nitrogen available to plants, it is necessary to determine the availability of sulfur on the basis of the C:S ratio. Niknahad-Gharmakher [68] observed that amino acids containing sulfur, such as methionine and cysteine, were very quickly degraded by soil microorganisms. Therefore, sulfur is rapidly released from plant debris that is applied to the soil.…”

Section: Microbiological Mineralization Of Crop Residuesmentioning

confidence: 99%

Environmental Factors Affecting the Mineralization of Crop Residues

2020

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The aim of this article is to present the issues related to the significance of microorganisms in the mineralization of crop residues and the influence of environmental factors on the rate of this process. Crop residues play a very important role in agriculture because they can be used both as an environment-friendly waste management strategy and as a means of improving soil organic matter. The inclusion of crop residues in the soil requires appropriate management strategies that support crop production and protect the quality of surface water and groundwater. Crops need nutrients for high yields; however, they can only absorb ionic forms of elements. At this point, the microorganisms that convert organically bound nitrogen, phosphorus, and sulfur into soluble NH4+, NO3−, H2PO4−, HPO42−, and SO42− ions are helpful. Mineralization is the transformation of organic compounds into inorganic ones, which is a biological process that depends on temperature, rainfall, soil properties, the chemical composition of crop residues, the structure and composition of microbial communities, and the C:N ratio in soil after the application of plant matter. An adjustment of the values of these factors enables us to determine the rate and direction of the mineralization of crop residues in soil.

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Mineralization-immobilization of sulphur in a soil during decomposition of plant residues of varied chemical composition and S content

Cited by 26 publications

References 28 publications

Soil Respiration as Affected by Long-Term Broiler Litter Application to a Udult in the Ozark Highlands

Soil Respiration as Affected by Long-Term Broiler Litter Application to a Udult in the Ozark Highlands

Soil Respiration Components and their Temperature Sensitivity Under Chemical Fertilizer and Compost Application: The Role of Nitrogen Supply and Compost Substrate Quality

Environmental Factors Affecting the Mineralization of Crop Residues

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