Decomposition and Carbon Dynamics of Crop Residue Mixtures in a Semiarid Long Term No-Till System: Effects on Soil Organic Carbon

Casado-Murillo, N.; Abril, Adriana

doi:10.2174/1874331501307010011

Cited by 8 publications

(4 citation statements)

References 43 publications

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“…Anyway, C input was not enough to maintain a SOC content of 33.3 g C kg -1 (Table 1) and hence, according to and Domínguez et al (2009), a decrease in SOC and POC throughout the experiment could have been expected regardless of TS and NF. Despite the higher C input due to N fertilization, it has been reported that continuous addition of N at high rates could lead to accelerated rates of residue decomposition and of organic soil C mineralization (Khan et al 2007;Poirier et al 2009;Casado-Murillo and Abril 2013;Melchiori et al 2014). Conversely, higher C input does not always lead to an increased SOC content since this depends on the balance between increased input and higher C dioxide emission.…”

Section: Bulk Soil and Particulate Organic Carbon And Anaerobic Nitrogen Changesmentioning

confidence: 99%

Is anaerobic mineralizable nitrogen suitable as a soil quality/health indicator?

Domínguez¹,

García²,

Studdert³

et al. 2016

Span. J. Soil Sci.

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Soil organic matter (SOM) and especially its labile fractions such as particulate organic matter (POM) are very sensitive to soil use and strongly influence soil ecosystem services. Particulate organic matter has been proposed as a soil quality/health indicator but its determination is tedious and time consuming (i.e. manhours). Anaerobic mineralizable nitrogen (AN) is closely related to the soil organic fraction and is very easily determined. Therefore, we proposed to evaluate AN as a soil quality/health indicator through the assessment of its relationship with SOM, POM, soil aggregate stability (AS), and maize (Zea mays L.) relative yield (RY) under different long term soil uses for cropping at Balcarce, Argentina (37º 45’ 14’’ S, 58º 17’ 52’’ W). Soil samples had been taken at two depths (0-5 and 5-20 cm) in the fall of 1998, 2000, 2003, 2006, 2009, and 2012 from a long term tillage system (TS, conventional (CT) and no-tillage (NT)) and nitrogen fertilization (NF, with and without nitrogen as fertilizer) experiment on a complex of Typic and Petrocalcic Argiudolls. Carbon contents in SOM (SOC), POM (POC) and AN were determined in all soil samples, whereas AS was determined in other soil samples taken in 2006, 2009 and 2012 from the arable layer (0-20 cm). Regardless of TS and NF, SOC, POC and AN decreased with time under cropping at both 5-20 and 0-20 cm. In the uppermost layer (0-5 cm) decreases of all three variables were observed only under CT. Anaerobically mineralized nitrogen variation related to SOC (R2 0.59 - 0.78, P < 0.05) and especially POC (R2 = 0.80-0.85, P < 0.05) variations. Likewise, changes in maize RY related better (R2 0.92 and 0.95 (P < 0.05) for CT and NT, respectively) to variation in AN, than to SOC and POC variations. Besides, changes in the aggregate mean weight diameter (DMWD) related acceptably to AN at 0-20 cm (R2 = 0.67, P < 0.05) and much better at 0-5 cm (R2 = 0.86, P < 0.05). Both coefficients of determination were higher than those obtained relating DMWD to SOC or POC. Given the easiness of its determination, its sensitivity, and that it relates to the variation of different key soil parameters and crop behavior, AN could be proposed as an effective soil quality/health indicator. However, studies should be carried out taking into account a broader range of soil and management situations in order to validate the trends observed in this work.

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Section: Bulk Soil and Particulate Organic Carbon And Anaerobic Nitrogen Changesmentioning

confidence: 99%

Is anaerobic mineralizable nitrogen suitable as a soil quality/health indicator?

Domínguez¹,

García²,

Studdert³

et al. 2016

Span. J. Soil Sci.

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“…Decomposition of plant residues is essential for the cycling of elements and the provisioning of nutrients to plants (Casado‐Murillo & Abril, 2013), and therefore for the sustainable management of agricultural systems (Hättenschwiler et al., 2005; Lavelle et al., 1993; Prescott, 2005). Litter breakdown depends on physical and chemical characteristics of the environment, litter nutrient concentrations and structure and the decomposer community (Couteaux et al., 1995; Knacker et al., 2003).…”

Section: Introductionmentioning

confidence: 99%

The role of Collembola for litter decomposition under minimum and conventional tillage

Hanisch

Engell

Linsler

et al. 2022

J. Plant Nutr. Soil Sci.

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Background The role of soil mesofauna in decomposition processes still is debated and this applies in particular to arable systems. Aim This study investigates the role of Collembola in decomposition processes of crop residues in two different tillage systems. Methods We conducted a litterbag experiment in a long‐term field site in Germany managed by conventional tillage (CT; mouldboard ploughing) and minimum tillage (MT). Litterbags filled with maize leaf litter of two mesh sizes (2 mm and 48 μm) were used. Litterbags were buried at 23 cm (CT) and 5–8 cm (MT), and retrieved after 2, 5 and 7 months. Litter mass, concentrations of carbon and nitrogen, litter C/N ratio as well as the abundance and community structure of Collembola and the incorporation of maize‐derived carbon into Collembola were investigated. Results Mesofauna enhanced the loss of litter carbon, while litter mass loss was reduced. Litter C/N ratio in MT was generally lower than that in CT and decreased faster in litterbags with coarse mesh size. Abundance of Collembola in litterbags in CT exceeded that in MT, but species composition remained unaffected by tillage. Overall, Collembola effectively colonised the litter irrespective of tillage system, but benefited in particular from translocation deeper into the soil by conventional tillage. Conclusions Mesofauna accelerates litter carbon loss and increases litter nitrogen accumulation irrespective of tillage system. This may reduce nitrogen losses due to leaching in winter and facilitate nitrogen capture from decomposing litter material by crops in the following season, thereby contributing to the sustainable management of arable systems.

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“…The application of organic material (e.g., crop residues) is one of the major sustainable management practices of cropland soils, and it increases or reduces the amounts of carbon inputs or outputs; improves soil physical, chemical and biological properties; potentially accomplishes the restoration of SOC and improves soil fertility [ 4 – 7 ]. It is also important for carbon transformation for conventional agriculture cropping systems in northeast China by transferring organic matter and nutrients to the soil [ 8 – 11 ]. Most studies in this area reveal that all of the tested organic materials show a gradual decreasing trend over time even though there are decomposition differences among these organic materials [ 12 – 14 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Maize Carbon Contribution to Soil Organic Carbon in Association with Soil Type and Fertility Level

Pei

et al. 2015

PLoS ONE

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Soil type and fertility level influence straw carbon dynamics in the agroecosystems. However, there is a limited understanding of the dynamic processes of straw-derived and soil-derived carbon and the influence of the addition of straw carbon on soil-derived organic carbon in different soils associated with different fertility levels. In this study, we applied the in-situ carborundum tube method and 13C-labeled maize straw (with and without maize straw) at two cropland (Phaeozem and Luvisol soils) experimental sites in northeast China to quantify the dynamics of maize-derived and soil-derived carbon in soils associated with high and low fertility, and to examine how the addition of maize carbon influences soil-derived organic carbon and the interactions of soil type and fertility level with maize-derived and soil-derived carbon. We found that, on average, the contributions of maize-derived carbon to total organic carbon in maize-soil systems during the experimental period were differentiated among low fertility Luvisol (from 62.82% to 42.90), high fertility Luvisol (from 53.15% to 30.00%), low fertility Phaeozem (from 58.69% to 36.29%) and high fertility Phaeozem (from 41.06% to 16.60%). Furthermore, the addition of maize carbon significantly decreased the remaining soil-derived organic carbon in low and high fertility Luvisols and low fertility Phaeozem before two months. However, the increasing differences in soil-derived organic carbon between both soils with and without maize straw after two months suggested that maize-derived carbon was incorporated into soil-derived organic carbon, thereby potentially offsetting the loss of soil-derived organic carbon. These results suggested that Phaeozem and high fertility level soils would fix more maize carbon over time and thus were more beneficial for protecting soil-derived organic carbon from maize carbon decomposition.

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Decomposition and Carbon Dynamics of Crop Residue Mixtures in a Semiarid Long Term No-Till System: Effects on Soil Organic Carbon

Cited by 8 publications

References 43 publications

Is anaerobic mineralizable nitrogen suitable as a soil quality/health indicator?

Is anaerobic mineralizable nitrogen suitable as a soil quality/health indicator?

The role of Collembola for litter decomposition under minimum and conventional tillage

Dynamics of Maize Carbon Contribution to Soil Organic Carbon in Association with Soil Type and Fertility Level

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