Proceedings - Soil Science Society of America最新文献_第10页

Quantification of the Loess Plateau's soil hydrodynamics in relation to bulk density 黄土高原土壤水动力与容重关系的定量研究

Proceedings - Soil Science Society of America Pub Date : 2025-03-31 DOI: 10.1002/saj2.70036

Ahmed Ehab Talat, Yuchi Chen, Yuan He, Zekang Cai, Jian Wang

{"title":"Quantification of the Loess Plateau's soil hydrodynamics in relation to bulk density","authors":"Ahmed Ehab Talat, Yuchi Chen, Yuan He, Zekang Cai, Jian Wang","doi":"10.1002/saj2.70036","DOIUrl":"10.1002/saj2.70036","url":null,"abstract":"Investigating the effects of varying degrees of soil compaction on its hydrodynamic properties is still a vital step in optimizing water utilization. Furthermore, hydrodynamic parameters such as saturated hydraulic conductivity (Ks) and soil water retention characteristics (SWRC) are essential data for soil water and solute transport calculations. However, it takes a lot of time and money to get direct measurements of hydrodynamic properties. The purpose of this study was to measure how the Loess Plateau's SWRC, Ks, and soil pores were affected by five different degrees of bulk density (BD), and quantify interactions between BD, soil organic carbon (SOC), and particle size distribution (PSD) on hydrodynamic parameters using pedotransfer function (PTF). Hydrodynamic parameters were predicted using multiple linear regression (MLR), and the best models were chosen using statistical standards and compared with Rosetta3 models based on predictors % sand, silt, and clay (SSC) and SSC+BD. The results showed that increasing soil BD from 1.00 to 1.40 g cm−3 led to significant reductions in soil saturated water content (SSAT), quickly draining pores (QDP), and Ks. Enhances SOC content and clay from micropores under BD, and low SOC soil suffers pore collapse. MLR model-based (BD+SOC) predicted hydrodynamic parameters, and the models demonstrated that “BD+SOC” is the best combination. MLR-BD+SOC model outperformed (root mean square error [RMSE]: 0.001–0.005; and R2: 0.91–0.98) on Rosetta3 models. The Rosetta3-SSC+BD model improved predictions in low-SOC soils but underperformed in SOC-rich soils. These findings emphasize integrating BD and SOC in PTF for accurate hydrodynamic modeling, particularly in erosion-prone, heterogeneous landscapes.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Subsampling method to eliminate wall flow from soil cores held in plastic liners 消除塑料衬垫内土壤岩心壁面流动的次采样方法

Proceedings - Soil Science Society of America Pub Date : 2025-03-28 DOI: 10.1002/saj2.70043

Alam Ramirez Reyes, Katherine Taylor, Matthew Darr, Robert Horton, Josh Heitman

{"title":"Subsampling method to eliminate wall flow from soil cores held in plastic liners","authors":"Alam Ramirez Reyes, Katherine Taylor, Matthew Darr, Robert Horton, Josh Heitman","doi":"10.1002/saj2.70043","DOIUrl":"10.1002/saj2.70043","url":null,"abstract":"Plastic liners are sometimes used with soil samplers in order to collect and store intact soil cores. Gaps at the soil–wall interface caused by the flexibility of plastic liners can result in wall flow, preventing accurate fluid flux density measurements. A subsampling method was developed to overcome problems with wall flow from soil samples collected with plastic liners in order to measure air permeability (ka) and saturated hydraulic conductivity (Ksat) on the intact cores. Subsamples were obtained after first immobilizing the soil within plastic liners by injecting expanding foam into the gaps between the soil and the liners. Once the soil was fixed in place, the soil samples were cut to the desired length, and sharpened metal rings were inserted into the original soil sample with a vise. With the metal ring at the desired depth, the subsample was removed from the original soil sample by cutting the liner and removing excess soil from the ends of the rings. Initial attempts to measure ka and Ksat on samples within the original liners led to unrealistically high values because significant wall flow occurred. However, after implementing the improved subsampling approach, the measured ka and Ksat of the subsamples were within the range of expected values based on the literature. The subsampling method effectively eliminated wall flow on soil originally collected in plastic liners and is relatively easy to implement without the need for specialized tools.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/saj2.70043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of biochar and cover crops on physical properties of two soils in Ohio 生物炭和覆盖作物对俄亥俄州两种土壤物理性质的影响

Proceedings - Soil Science Society of America Pub Date : 2025-03-28 DOI: 10.1002/saj2.70041

Sandhya Karki, Raj Shrestha, Rattan Lal, Klaus Lorenz, Laura E. Lindsey

{"title":"Effects of biochar and cover crops on physical properties of two soils in Ohio","authors":"Sandhya Karki, Raj Shrestha, Rattan Lal, Klaus Lorenz, Laura E. Lindsey","doi":"10.1002/saj2.70041","DOIUrl":"10.1002/saj2.70041","url":null,"abstract":"Applying biochar (BC) and integrating cover crops (CCs) into crop rotations may enhance soil health. However, studies on the combined effects of these practices on soil physical health are scant. Therefore, this study evaluated the effects of BC, CC, and their combined (BC + CC) application on the physical properties of the medium and fine-textured soils in Ohio. In the fall of 2020, 10 Mg ha−1 of pine (Pinus L.) wood chips derived BC was applied. Rye (Secale cereale L.) and winter wheat (Triticum aestivum L.) were planted as CC in 2021 and 2022, respectively. Soil physical properties: bulk density, penetration resistance (PR), water retention, and wet aggregate stability were assessed in fall 2023. Note that 2 years of winter CCs alone did not generate evident effects on any soil's physical properties. However, adding BC and BC + CC improved some specific soil properties, with effects varying by soil texture. In the medium-textured soil, BC reduced soil PR from 1.18 MPa in the unamended control to 0.89 MPa at 7.5-cm depth, while BC + CC increased wet aggregate mean weight diameter by 0.6 mm, reaching 4.1 mm compared to the control for 0- to 10-cm depth. In the fine-textured soil, BC increased soil moisture retention at field capacity from 0.36 to 0.39 cm3 cm−3 and plant available water from 0.13 to 0.16 cm3 cm−3 in 0- to 5-cm depth. The BC + CC reduced PR by 32% to 0.93 MPa compared to control at 7.5-cm soil depth. Overall, this study highlights the potential of combining BC and CC to improve soil physical health, paving the way for improved soil management practices.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/saj2.70041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatial distribution, drivers and future trends of soil organic carbon in cropland of China 中国农田土壤有机碳空间分布、驱动因素及未来趋势

Proceedings - Soil Science Society of America Pub Date : 2025-03-24 DOI: 10.1002/saj2.70042

Shihang Zhang, Yusen Chen, Xiaobing Zhou, Bo Zhu

{"title":"Spatial distribution, drivers and future trends of soil organic carbon in cropland of China","authors":"Shihang Zhang, Yusen Chen, Xiaobing Zhou, Bo Zhu","doi":"10.1002/saj2.70042","DOIUrl":"10.1002/saj2.70042","url":null,"abstract":"Soil organic carbon (SOC) pool of cropland is one of the most active parts of the global C pool. Hence, it is important to estimate cropland SOC stock, drivers, and future evolutionary trends in order to improve the C sequestration and emission reduction capacity of cropland soil and stability of food production. In this study, we utilized 856 samples for SOC density (SOCD) at a depth of 0–20 cm and 544 samples for SCOD at 0–100 cm. Using five machine learning models combined with environmental factors data, we predicted the spatial distribution, key drivers, and future trends of SOC in China's croplands. The results were as follows: (1) The mean values of SOCD0–20 cm and SOCD0–100 cm were 2.98 and 7.88 kg m−2, respectively, and the stocks were 5.64 and 14.91 Pg, which accounted for 15.78% and 17.25% of the SOC stocks in terrestrial ecosystems, respectively. (2) Soil physicochemical properties consistently explained more of the spatial variation in SOCD uniquely than other factors, explaining 50% and 43% of the spatial variation in SOCD0–20 cm and SOCD0–100 cm, respectively. SOCD0–20 cm was mainly driven by nitrogen deposition and human impacts; SOCD0–100 cm was mainly driven by pH, normalized difference vegetation index, mean annual precipitation, and mean annual temperature. (3) Under Shared Socioeconomic Pathway 5–8.5 (high-C emissions), the greatest decline trend of cropland two-depth SOC stock. Our study is important for understanding global changes in cropland soil C stocks and in enhancing human capacity to implement mitigation and adaptation strategies.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing cropping system effects on carbon footprint on the Canadian prairies 评估种植制度对加拿大草原碳足迹的影响

Proceedings - Soil Science Society of America Pub Date : 2025-03-20 DOI: 10.1002/saj2.70039

Sisi Lin, Kui Liu, Reynald Lemke

{"title":"Assessing cropping system effects on carbon footprint on the Canadian prairies","authors":"Sisi Lin, Kui Liu, Reynald Lemke","doi":"10.1002/saj2.70039","DOIUrl":"10.1002/saj2.70039","url":null,"abstract":"Crop rotations are considered a promising strategy for mitigating greenhouse gas (GHG) emissions and enhancing soil organic matter in agricultural land. However, studies often focused solely on either GHG emissions or soil organic carbon (SOC) changes, rather than integrating both indicators. We conducted a 4-year (2018–2021) crop rotation study to examine effects of six rotation systems in three ecoregions (sub-humid, sub-semiarid, and semiarid) on GHG emissions, SOC changes, and C footprints in Saskatchewan, Canada. The six rotation systems include (i) control, (ii) intensified, (iii) diversified, (iv) market-driven, (v) high-risk, and (vi) soil-health cropping system. GHG emissions were estimated using the Holos model, and SOC changes were estimated using the Campbell model, and C footprints were calculated as the difference between GHG emissions and SOC changes. The 4-year cumulative GHG emissions, expressed as CO2 equivalent (CO2e), were highest in the sub-humid ecoregion due to higher background SOC levels, nitrogen (N) fertilizer inputs, and precipitation. The diversified and soil-health systems reduced GHG emissions by reduced N fertilizer inputs. Carbon footprints revealed net CO2e emissions for the market-driven system but net CO2e withdrawals for the soil-health and diversified systems. The results indicated that the diversified systems significantly mitigated GHG emissions, increased soil C stocks, and withdrew CO2e.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/saj2.70039","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Maize–common bean intercropping effects on nitrogen fixation, nutrient uptake, and soil properties in southern Ethiopia 埃塞俄比亚南部玉米-蚕豆间作对固氮、养分吸收和土壤性质的影响

Proceedings - Soil Science Society of America Pub Date : 2025-03-19 DOI: 10.1002/saj2.70037

Tigist Yimer, Girma Abera, Sheleme Beyene, Shimelis Gizachew, Frank Rasche

{"title":"Maize–common bean intercropping effects on nitrogen fixation, nutrient uptake, and soil properties in southern Ethiopia","authors":"Tigist Yimer, Girma Abera, Sheleme Beyene, Shimelis Gizachew, Frank Rasche","doi":"10.1002/saj2.70037","DOIUrl":"10.1002/saj2.70037","url":null,"abstract":"Smallholder farmers need to cope with small farm sizes, low soil fertility, and risks associated with rain-fed agriculture, which resulted in low productivity. Crop diversification potentially improves yields and resource use efficiencies in these systems. Field experiments were conducted at two sites in southern Ethiopia to determine the effects of common bean (Phaseolus vulgaris L.) intercropping time and frequency on biological nitrogen fixation (BNF), nutrient uptake, and soil properties. Treatments included monocrops of maize (M) and common bean (Bn), double common bean mono crop (Bn + Bn), simultaneous (M + Bn), relay (M + BnR), and sequential common bean intercropping with maize (M + Bn + Bn). BNF by common bean under these systems was estimated BNF using the 15N natural abundance method. Intercropping had no significant (p > 0.05) effect on BNF compared to common bean monoculture at both sites. However, there were significant differences in BNF among intercropping systems at site 1. Significantly higher BNF were obtained from M + Bn + Bn compared with M + Bn and M + BnR. Intercropping significantly (p < 0.05) increased the N and P uptakes compared to unfertilized maize monoculture at both sites, resulting in increased yields but no significant effect on nutrient use efficiencies. Significantly higher N and P uptakes were obtained from M + Bn + Bn compared to other intercropping, and significantly lower N and P uptakes were obtained from M + Bn and M + BnR. Intercropping had no significant (p > 0.05) effect on most soil properties possibly due to the short experimental duration. Therefore, nutrient management strategy is required in intercropping systems to counter the increased nutrient uptake which could cause soil depletion in the long term particularly if all biomass is removed from the field.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/saj2.70037","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of composted cattle manure and cover crops on winter wheat performance and soil fertility 堆肥牛粪和覆盖作物对冬小麦生产性能和土壤肥力的影响

Proceedings - Soil Science Society of America Pub Date : 2025-03-19 DOI: 10.1002/saj2.70040

Christina M. Helseth, Urszula Norton

{"title":"Effects of composted cattle manure and cover crops on winter wheat performance and soil fertility","authors":"Christina M. Helseth, Urszula Norton","doi":"10.1002/saj2.70040","DOIUrl":"10.1002/saj2.70040","url":null,"abstract":"Dryland winter wheat (Triticum aestivum L.) production in the semiarid Northern High Plains region of the United States is challenged by inadequate soil organic matter, plant nutrients, and frequent droughts. A single application of a high rate of composted cattle manure (compost) may help to address these issues. To conserve compost-associated benefits and to prevent compost-amended soils from weed infestation, spring planting of cover crops has been recommended. The objective of this study was to evaluate the legacies of a single application of compost (0, 15, 30, and 45 Mg ha−1) and annual cover crop planting in the fallow phase on soil moisture, nitrogen (N), carbon (C), and plant-available phosphorus (AP) 3–7 years after application. Results suggest no synergy between compost and cover crops, but that compost alone can improve soil health. The highest rate of compost showed elevated levels of plant-available N, dissolved organic carbon, and AP in the 0–5 cm and 5–15 cm soil profiles throughout the duration of the study (2018–2022). Soil organic C and total N remained elevated at both soil profile depths when measured in 2019. However, wheat grain yield and protein were not affected by these improvements to soil health at this time. A single application of compost at a rate of 45 Mg ha−1 was sufficient to increase soil health and plant-available nutrients over the 5-year study period but did not increase crop yield. Growing cover crops did not negatively affect crop yield.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advances in technology for using Indicator of Reduction in Soils (IRIS) to quantify porewater sulfide levels in the coastal zone 利用土壤减少指数（IRIS）量化海岸带孔隙水硫化物水平的技术进展

Proceedings - Soil Science Society of America Pub Date : 2025-03-16 DOI: 10.1002/saj2.70035

M. C. Rabenhorst, J. Wyss-Gallifent, J. D. Kim, C. E. Park, B. M. Wessel

{"title":"Advances in technology for using Indicator of Reduction in Soils (IRIS) to quantify porewater sulfide levels in the coastal zone","authors":"M. C. Rabenhorst, J. Wyss-Gallifent, J. D. Kim, C. E. Park, B. M. Wessel","doi":"10.1002/saj2.70035","DOIUrl":"10.1002/saj2.70035","url":null,"abstract":"Soluble sulfide is toxic to many plants and animals and is especially problematic in brackish environments of the coastal zone (e.g., marshes and benthic environments). In addition to traditional techniques for measuring porewater sulfide in marsh and subaqueous systems (peepers, sippers, and centrifugal extraction), over the last decade or so, Indicator of Reduction in Soils (IRIS) has been added to the arsenal of available methods. Soluble sulfide reacts with the Fe oxide coatings on IRIS devices to form gray to black iron monosulfide (FeS) stains and coatings, the color of which is a function of both the concentration of the sulfide and the time of exposure. Challenges in using IRIS for sulfide analysis stem from the fact that the dark FeS colors fade quickly over a period of minutes to hours. During the last few years, significant advances in IRIS technology, as well as recent advances in digital image acquisition and image analysis, have allowed us to develop an IRIS approach for quickly and effectively collecting and quantifying porewater sulfide levels in coastal environments (e.g., subaqueous areas and marshes). This article will introduce new tools for deploying IRIS in subaqueous settings and will also demonstrate the utility of the new digital technology for image acquisition and analysis, as sulfide data from two marsh sites and four subaqueous soil sites are presented and discussed.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/saj2.70035","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soil nitrogen dynamics on a saline-alkali sunflower land under arid region in Western Inner Mongolia 内蒙古西部干旱区盐碱向日葵地土壤氮动态

Proceedings - Soil Science Society of America Pub Date : 2025-03-12 DOI: 10.1002/saj2.70030

Liming Lai, Hanxiao Feng, Peng Zhang, Xueao Gao, Man Wang, Qiya Peng, Yang Yang, Haiwei Wang

{"title":"Soil nitrogen dynamics on a saline-alkali sunflower land under arid region in Western Inner Mongolia","authors":"Liming Lai, Hanxiao Feng, Peng Zhang, Xueao Gao, Man Wang, Qiya Peng, Yang Yang, Haiwei Wang","doi":"10.1002/saj2.70030","DOIUrl":"10.1002/saj2.70030","url":null,"abstract":"Sunflower (Helianthus annuus L.), a dominant crop in Hetao Irrigation District, Western Inner Mongolia, is cultivated in arid and saline-alkaline fields due to their salt and alkali tolerance, ensuring that farmers’ income from these fields is not lower than those from fertile lands. However, little is known about the integrated analysis of nitrogen (N) dynamics, including soil total N (TN), nitrate (NO3−), leachate TN and NO3−, nitrous oxide (N2O) fluxes, and N cycling microbial gene abundance in sunflower fields. The specific objective was to explore N dynamics for 2021 through 2023 in sunflower seeded to saline-alkali croplands under arid condition based on treatments of irrigation rate (I rate: I1, 5110; I2, 4050; I3, 2985 m3 ha−1) for washing salinity by irrigation and nitrogen fertilization rate (N rate: N1, 750; N2, 600; N3, 450; N0, 0 kg ha−1). Our findings indicated that I rate did not affect soil N dynamics; N rate significantly increased soil TN, NO3− and N2O fluxes, especially showing an extremely significant increase for leachate TN and NO3− leachate. The interaction of I and N rates impacted soil TN, NO3−, their leachate, and N cycling microbial gene abundances, especially denitrification genes. Soil leachate TN and NO3− increased exponentially over time. Soil N2O fluxes increased annually with the growth of sunflowers. In the saline-alkali sunflower fields, low N rate (450 kg ha −1) can be an optimal strategy, and the precise calibration of I and N rates can guarantee adequate N dynamics and yields, highlighting the intricate balance required for sustainable agricultural practices.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shrinkage analysis of repacked soil samples enables quantifying the soil's potential physical quality 重新包装土壤样品的收缩分析可以量化土壤的潜在物理质量

Proceedings - Soil Science Society of America Pub Date : 2025-03-12 DOI: 10.1002/saj2.70033

Cédric Deluz, Alyssa Deluz, Thomas Keller, Sebastian Doetterl, Pascal Boivin

{"title":"Shrinkage analysis of repacked soil samples enables quantifying the soil's potential physical quality","authors":"Cédric Deluz, Alyssa Deluz, Thomas Keller, Sebastian Doetterl, Pascal Boivin","doi":"10.1002/saj2.70033","DOIUrl":"10.1002/saj2.70033","url":null,"abstract":"This paper investigates the physical properties of soil samples repacked from aggregate beds and the potential for retrieving representative soil pore properties at the field scale based on shrinkage analysis of a repacked composite sample. This approach was tested on 60 arable fields in Switzerland presenting a large range of soil organic carbon (SOC) and texture. Soil cores constituted from composite samples were repacked at the observed field bulk density. Their pore properties were compared to undisturbed soil samples from the same fields. The soil pore properties were characterized using shrinkage analysis and correlated to soil texture and SOC. The repacking protocol successfully recreated structured samples. The <40-µm equivalent diameter pore and structural pore size distributions were comparable to those of the undisturbed soils. For pores >40 µm, a larger porosity was measured for repacked samples compared to undisturbed ones, limiting the approach to assess the structure and dynamics of larger soil pores. Furthermore, soil clay content as well as SOC were strong predictors for the samples’ physical properties including pore space. The increase in structural porosity in the repacked sample was inversely proportional to the structural porosity already present in the undisturbed samples. Steeper regression slopes of the pore volume to SOC or clay relationship were observed for the repacked samples. These slope changes were comparable to those observed in soil structure restoration experiments and opposite to those observed in soil compaction trials. We conclude that repacking soil from a composite sample allows us to characterize the potential soil structure condition with respect to its SOC and clay content. The method can be used to assess soil structure quality in response to changes in soil management.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/saj2.70033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0