Soil aggregate stability and its response to overland flow in successive Eucalyptus plantations in subtropical China

Soil aggregate stability as a key indicator of soil structure and erodibility to evaluate soil stability, is a product of interactions between soil environment, management practices, and land use patterns. The objective of this study was to analyze the distribution characteristics, characteristics of fractal features and stability of soil aggregates in tea plantations and eucalyptus plantations of Western Sichuan in China. The dry- and water-stable aggregate size distributions were determined by dry sieving and wet sieving methods. The results showed that soil structural properties in tea and eucalyptus plantations were similar. With increase in depth of soil layer, the aggregate stability of tea plantation soil became stronger. Comparative analysis of dry and wet sieving results showed that most of the aggregates in tea plantation soil were unstable. The soil aggregates >5mm and 0.5-0.25mm in size had higher stability, while those 2-1mm in size had lower stability. For tea plantation soil, the correlation coefficients between aggregate stability index and mean weight diameter, geometric mean diameter, fractal dimension were bigger under wet sieving than those under dry sieving. The results showed that aggregate stability index, mean weight diameter, geometric mean diameter, fractal dimension of water-stable aggregates could characterize soil aggregate stability in tea plantation ideally.

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Dynamics of soil aggregate stability as induced by potassium in a soil-plant system

Soil Science & Plant Nutrition ◽

10.1080/00380768.2021.1939151 ◽

2021 ◽

pp. 1-9

Author(s):

Surachet Aramrak ◽

Natthapol Chittamart ◽

Worachart Wisawapipat ◽

Wutthida Rattanapichai ◽

Mutchima Phun-Iam ◽

...

Keyword(s):

Aggregate Stability ◽

Soil Aggregate ◽

Soil Aggregate Stability ◽

Plant System

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Dynamics of Soil Organic Carbon and Labile Carbon Fractions in Soil Aggregates Affected by Different Tillage Managements

Sustainability ◽

10.3390/su13031541 ◽

2021 ◽

Vol 13 (3) ◽

pp. 1541

Author(s):

Xiaolin Shen ◽

Lili Wang ◽

Qichen Yang ◽

Weiming Xiu ◽

Gang Li ◽

...

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Soil Aggregates ◽

Aggregate Stability ◽

Soil Aggregate ◽

No Tillage ◽

Labile Carbon ◽

Carbon Fractions ◽

Soil Aggregate Stability ◽

Positive Effects

Our study aimed to provide a scientific basis for an appropriate tillage management of wheat-maize rotation system, which is beneficial to the sustainable development of agriculture in the fluvo-aquic soil areas in China. Four tillage treatments were investigated after maize harvest, including rotary tillage with straw returning (RT), deep ploughing with straw returning (DP), subsoiling with straw returning (SS), and no tillage with straw mulching (NT). We evaluated soil organic carbon (SOC), dissolved organic carbon (DOC), permanganate oxidizable carbon (POXC), microbial biomass carbon (MBC), and particulate organic carbon (POC) in bulk soil and soil aggregates with five particle sizes (>5 mm, 5–2 mm, 2–1 mm, 1–0.25 mm, and <0.25 mm) under different tillage managements. Results showed that compared with RT treatment, NT treatment not only increased soil aggregate stability, but also enhanced SOC, DOC, and POC contents, especially those in large size macroaggregates. DP treatment also showed positive effects on soil aggregate stability and labile carbon fractions (DOC and POXC). Consequently, we suggest that no tillage or deep ploughing, rather than rotary tillage, could be better tillage management considering carbon storage. Meanwhile, we implied that mass fractal dimension (Dm) and POXC could be effective indicators of soil quality, as affected by tillage managements.

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Sludge amendment accelerating reclamation process of reconstructed mining substrates

Scientific Reports ◽

10.1038/s41598-021-81703-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Dan Li ◽

Ningning Yin ◽

Ruiwei Xu ◽

Liping Wang ◽

Zhen Zhang ◽

...

Keyword(s):

Soil Structure ◽

Aggregate Stability ◽

Soil Aggregate ◽

Soil Reclamation ◽

Soil Restoration ◽

Total Biomass ◽

Soil Aggregate Stability ◽

Mining Soil ◽

Positive Correlations ◽

Reclamation Process

AbstractWe constructed a mining soil restoration system combining plant, complex substrate and microbe. Sludge was added to reconstructed mine substrates (RMS) to accelerate the reclamation process. The effect of sludge on plant growth, microbial activity, soil aggregate stability, and aggregation-associated soil characteristics was monitored during 10 years of reclamation. Results show that the height and total biomass of ryegrass increases with reclamation time. Sludge amendment increases the aggregate binding agent content and soil aggregate stability. Soil organic carbon (SOC) and light-fraction SOC (LFOC) in the RMS increase by 151% and 247% compared with those of the control, respectively. A similar trend was observed for the glomalin-related soil protein (GRSP). Stable soil aggregate indexes increase until the seventh year. In short, the variables of RMS determined after 3–7 years insignificantly differ from those of the untreated sample in the tenth-year. Furthermore, significant positive correlations between the GRSP and SOC and GRSP and soil structure-related variables were observed in RMS. Biological stimulation of the SOC and GRSP accelerates the recovery of the soil structure and ecosystem function. Consequently, the plant–complex substrate–microbe ecological restoration system can be used as an effective tool in early mining soil reclamation.

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Short-Term Dynamics of Soil Aggregate Stability in the Field

Soil Science Society of America Journal ◽

10.2136/sssaj2014.01.0009 ◽

2014 ◽

Vol 78 (4) ◽

pp. 1168-1176 ◽

Cited By ~ 20

Author(s):

Baptiste Algayer ◽

Yves Le Bissonnais ◽

Frédéric Darboux

Keyword(s):

Aggregate Stability ◽

Soil Aggregate ◽

Short Term ◽

Soil Aggregate Stability

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Soil aggregate stability to predict organic carbon outputs from soils

Geoderma ◽

10.1016/j.geoderma.2014.12.013 ◽

2015 ◽

Vol 243-244 ◽

pp. 205-213 ◽

Cited By ~ 56

Author(s):

V. Chaplot ◽

M. Cooper

Keyword(s):

Organic Carbon ◽

Aggregate Stability ◽

Soil Aggregate ◽

Soil Aggregate Stability

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The effect of four calcium-based amendments on soil aggregate stability of two sandy topsoils

Journal of Plant Nutrition and Soil Science ◽

10.1002/jpln.201700562 ◽

2018 ◽

Vol 182 (2) ◽

pp. 159-166 ◽

Cited By ~ 1

Author(s):

Gabriela Vargas ◽

José Verdejo ◽

Adrian Rivera ◽

Domingo Suárez ◽

Cristian Youlton ◽

...

Keyword(s):

Aggregate Stability ◽

Soil Aggregate ◽

Soil Aggregate Stability

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Root density drives aggregate stability of soils of different moraine ages in the Swiss Alps

Plant and Soil ◽

10.1007/s11104-021-05111-8 ◽

2021 ◽

Author(s):

Konrad Greinwald ◽

Tobias Gebauer ◽

Ludwig Treuter ◽

Victoria Kolodziej ◽

Alessandra Musso ◽

...

Keyword(s):

Root Length Density ◽

Plant Cover ◽

Aggregate Stability ◽

Soil Aggregate ◽

Root Density ◽

Swiss Alps ◽

Landscape Development ◽

Soil Aggregate Stability ◽

Alpine Regions ◽

Vegetation Parameters

Abstract Aims The stability of hillslopes is an essential ecosystem service, especially in alpine regions with soils prone to erosion. One key variable controlling hillslope stability is soil aggregate stability. We aimed at identifying dominant controls of vegetation parameters on aggregate stability and analysed their importance for soil aggregate stability during landscape development. Methods We quantified the aggregate stability coefficient (ASC) and measured plant cover, diversity, root mass and root length, density (RMD, RLD) along two chronosequences with contrasting bedrocks (siliceous, calcareous) in the Swiss Alps. Results We found that ASC developed slower along the calcareous chronosequence. Furthermore, we observed a significant positive effect of vegetation cover and diversity on ASC that was mediated via root density. These relationships developed in a time-depended manner: At young terrain ages, vegetation parameters had a strong effect on aggregate stability compared to older stages. Moreover, RLD was the most powerful predictor of ASC on young terrain, whereas on older moraines RMD became more important. Conclusions We highlight that root density plays a major role in governing ASC for soils differing in moraine ages. The changing importances of RLD and RMD for ASC development suggest different mechanistic linkages between vegetation and hillsope stability during landscape development.

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