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IJERPH | Free Full-Text | Effects of Biochar Combined .

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Reduction of soil fertility and production efficiency resulting from excessive application of chemical fertilizers is universal in rapeseed-growing fields. The main objective of our study was to assess the effects of biochar combined with nitrogen fertilizer reduction on soil aggregate stability and rapeseed yield and to identify the relationship between yield and soil aggregate stability.

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Non‐native plants and soil microbes: potential ...

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Overall, this work illustrates that non‐native plants and soil microbial communities are potential contributors to the consistent reduction in soil aggregate stability, which is an important measure of ecosystem function. Although further work is required to test the generality of the role played by plant and soil microbial composition in soil stabilization, focus on the restoration of these ...

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Soil-Aggregate-Scale Heterogeneity in Microbial Selenium ...

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Soil-Aggregate-Scale Heterogeneity in Microbial ... Within the physically complex matrix of a soil, microbial reduction is dictated by the local chemical conditions and is thus subject to the soil's physical, chemical, and biological heterogeneity. Aggre-gates, which are millimeter- to centimeter-sized structural units of clay, silt, and sand particles bound by roots, fungal hyphae, and ...

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Soil particle-size distribution and aggregate .

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Artificial soil erosion caused by engineering practices is becoming increasingly severe worldwide. However, little is known about the change of soil structure of new reconstructed purple soil after erosion in the hilly areas of Southwest China. This study aims to analyze the effects of erosion on the soil particle-size distribution (PSD) and aggregate stability of new reconstructed purple soil ...

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Interactive global change factors mitigate soil ...

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Interactive global change factors mitigate soil aggregation and carbon change in a semi‐arid grassland. Tongshuo Bai. Ecosystem Ecology Laboratory, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China. Search for more papers by this author.

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Standard Practice for Reducing Samples of .

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01.05.2018 · There are three methods for the reduction of large bulk samples of aggregate to an appropriate size for testing where variations in measured characteristics between the test sample and the large ...

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soil aggregate reduction - crmbakery

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Soil-Aggregate-Scale Heterogeneity in Microbial Selenium Reduction Article (PDF Available) in Vadose Zone Journal 11(2) · May 2012 with 93 Reads DOI: 10.2136/vzj2011.0101 [PDF] Get Price Designing and Constructing Roads with Geogrid

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Effect of reduction of aggregate size on the .

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Aggregate‐size reduction did not affect the PE within soil management treatments regardless of substrate addition. Most of the CO₂ produced was derived from SOC rather than substrate addition and peaked at day 3. There was an interaction between microbial biomass C and dissolved organic C on the PE in the grassland soil only. The results suggested that the PE is an intrinsic characteristic ...

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(PDF) Effects of Biochar Combined with Nitrogen .

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reduction on soil aggregate stability is not well known. Besides, based on the short-term conditions, whether the biochar can replace nitrogen fertilizer still lacks su ffi cient practice ...

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Reduction in soil aggregation in response to dust emission ...

sent a reduced soil aggregation state of the original soils N L and G L,re-spectively. A total of 36 samples (18 replicates for each soil) were taken from the treated topsoils. The samples were analyzed only for ASD, considering that no changes in other physicochemical properties are expected following such a short-term treatment. Aftertheaeolianexperiments(Section2.3)forthefourdifferentini ...

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Soil aggregate mediates the impacts of land uses .

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17/02/2017 · Soil sampling and aggregate fractionation. All surface soil (0–15 cm) samples were collected from each plot in January 2014. One undisturbed soil sample was taken in .

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Soil Aggregates - an overview | ScienceDirect Topics

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A soil aggregate is a group of primary soil particles that cohere to each other more strongly than to other surrounding particles. ... Another possible long-term impact of no-till on AMF abundance and effectiveness can result from the reduction in soil erosion (Habte, 1989). Most of the studies reporting the effect of tillage systems on AMF biodiversity used spore identification and trap ...

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Reduction in soil aggregate size distribution due .

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Reduction in soil aggregate size distribution due to wind erosion Swet, Nitzan; Katra, Itzhak; Abstract. Soil erosion process by wind causes emission of fine soil particles, and thus alters the topsoil's properties, fertility, and erodibility. Topsoil resistance to erosion depends on its physicochemical properties, especially on the soil aggregation. Although the key role of aggregates in soil ...

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Soil aggregate size influences the impact of .

The four soil aggregate sizes amended with the 2 N deposition forms (NH4+-N and NO3−-N) were then incubated at 25 °C for 28 days, and the soil aggregates for each treatment were collected on day 0, 7, 14, 21, and 28 to determine the NO3−-N concentration. The soil Nr and contribution of soil aggregates to the nitrification rate in the bulk soil were calculated. Results There were ...

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Frontiers | Denitrification in Soil Aggregate .

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Soil-borne nitrous oxide (N2O) emissions have a high spatial and temporal variability which is commonly attributed to the occurrence of hotspots and hot moments for microbial activity in aggregated soil. Yet there is only limited information about the biophysical processes that regulate the production and consumption of N2O on microscopic scales in undisturbed soil.

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Vadose Zone Journal - Original Research Soil .

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Promoting soil aggregation on seleniferous agricultural soils, through the addition of organic matter and reduction of tillage, may be an effective management practice to reduce the impacts of Se-contaminated drainage water on downstream ecosystems. This result may also be useful in the development of treatment systems designed to remove Se from waste water because they suggest that the use of ...

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Reduction in soil aggregation in response to dust .

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Request PDF | On Jun 1, 2016, Nitzan Swet and others published Reduction in soil aggregation in response to dust emission processes | Find, read and cite all the research you need on ResearchGate

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Soil Aggregate Microbial Communities: Towards ...

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15/07/2019 · Aggregate samples from various agricultural soil treatments were sieved into size classes (0.05 to <0.25 mm, 0.25 to <2 mm, and >2 mm) and assessed for aggregate size distribution, changes in soil organic carbon, and microbial community composition. Aggregate size classes were shown to have a significant impact on soil properties, affecting both carbon retention and the microbial community ...

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Non‐native plants and soil microbes: potential ...

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Non‐native plants and soil microbes: potential contributors to the consistent reduction in soil aggregate stability caused by the disturbance of North American grasslands Jessica Duchicela Department of Biology, Indiana University, 1001 E. 3rd Street, Jordan Hall 142, Bloomington, IN 47405‐7005, USA

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Reduction in soil aggregation in response to dust .

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Reduction in soil aggregation in response to dust emission processes Swet, Nitzan; Katra, Itzhak; Abstract. Dust emission by aeolian (wind) soil erosion depends on the topsoil properties of the source area, especially on the nature of the aggregates where most dust particles are held. Although the key role of soil aggregates in dust emission, the response of soil aggregation to aeolian ...

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Effects of tillage, crop establishment and .

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Soil aggregation is an important mechanism which contributes to soil fertility through reducing soil erosion, ... Crop residues act as barrier between soil and the open environment which may have great role in soil erosion reduction, and soil quality improvement. Soil physical (Indoria et al., 2017), chemical (Jat et al., 2018) and biological (Choudhary et al., 2018a) properties particularly ...

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