Short-term effects of tillage practices on soil aggregate fractions in a Chinese Mollisol

The depth of sampling is an important factor for evaluating soil stability. The objective of this study was to test soil aggregate particle-size fractions and soil organic carbon (SOC) in water-stable aggregate by vegetation restoration through 0–60 cm soil profile. We collected soil samples in 30 years old Robinia psendoacacia (Rr); Platycladus orientalis (Po); Pinus tabulaeformis (Pt); abandoned land (Ab), and slope cropland (Sc), which were separated into > 2, 2–1, 1–0.25, 0.25–0.053, and < 0.053 mm fractions. The > 0.25 mm water-stable aggregates (WSA) and mean weight diameter (MWD) were calculated in 0–60 cm soil depth. Results showed that soil aggregate fractions<br /> (> 0.25 mm) of four vegetation types were significantly (P < 0.05) higher in 40–60 cm soil depth under Po, Pt, and Ab compared with Sc and the SOC distribution in macro-aggregates (> 0.25 mm) under Rr, Po, Pt, and Ab was higher more than 37.7, 92.4, 92.5, 79.1%, respectively in 40–60 cm compared with Sc additionally, > 0.25 mm WSA and MWD was significantly higher in Pt soil in 20–40 cm, 40–60 cm soil depth (P < 0.05). The results demonstrated that soil stability was enhanced and SOC content was increased after converting slope cropland to forest, especially under Pt forest that greatly influenced the subsoil.

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Accumulations of copper in apple orchard soils: distribution and availability in soil aggregate fractions

Journal of Soils and Sediments ◽

10.1007/s11368-015-1065-y ◽

2015 ◽

Vol 15 (5) ◽

pp. 1075-1082 ◽

Cited By ~ 14

Author(s):

Quan-Ying Wang ◽

Jing-Shuang Liu ◽

Yang Wang ◽

Hong-Wen Yu

Keyword(s):

Soil Aggregate ◽

Apple Orchard ◽

Aggregate Fractions ◽

Soil Aggregate Fractions ◽

Orchard Soils

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Accumulation and relationship of metals in different soil aggregate fractions along soil profiles

Journal of Environmental Sciences ◽

10.1016/j.jes.2021.07.007 ◽

2022 ◽

Vol 115 ◽

pp. 47-54

Author(s):

Qian Shen ◽

Mengjie Wu ◽

Mingkui Zhang

Keyword(s):

Soil Aggregate ◽

Soil Profiles ◽

Aggregate Fractions ◽

Soil Aggregate Fractions ◽

Relationship Of

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Organic matter mineralization in different soil aggregate fractions

Eurasian Soil Science ◽

10.1134/s1064229310020031 ◽

2010 ◽

Vol 43 (2) ◽

pp. 141-148 ◽

Cited By ~ 17

Author(s):

V. M. Semenov ◽

L. A. Ivannikova ◽

N. A. Semenova ◽

A. K. Khodzhaeva ◽

S. N. Udal’tsov

Keyword(s):

Organic Matter ◽

Soil Aggregate ◽

Organic Matter Mineralization ◽

Aggregate Fractions ◽

Soil Aggregate Fractions

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Nitrogen addition increases the contents of glomalin-related soil protein and soil organic carbon but retains aggregate stability in a Pinus tabulaeformis forest

10.7287/peerj.preprints.26649v1 ◽

2018 ◽

Author(s):

Lipeng Sun ◽

Guoliang Wang ◽

Hang Jing ◽

Guobin Liu

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Geometric Mean ◽

Aggregate Stability ◽

Soil Aggregate ◽

Pinus Tabulaeformis ◽

N Addition ◽

Short Term ◽

Aggregate Fractions ◽

Soil Protein

Background: Glomalin-related soil protein (GRSP) and soil organic carbon (SOC) contribute to the formation and stability of soil aggregates, but the mechanism by which global atmospheric nitrogen (N) deposition changes soil aggregate stability when it alters the distribution of GRSP and SOC in different aggregate fractions remains unknown. Methods: We used a gradient N addition (0–9 g N–2 y–1) in Pinus tabulaeformis forest for 2 years in northeast China and then examined the changes in SOC contents, total GRSP (T-GRSP), and easily extractable GRSP (EE-GRSP) contents in three soil aggregate fractions (macro-aggregate: >250 μm, micro-aggregate: 250–53 μm, and clay–silt aggregate: <53 μm) and their relationship with aggregate stability. Results: (1) The soil was dominated by macro-aggregates. Short term N addition had no significant effect on mean weight diameter (MWD) and geometric mean diameter (GMD). (2) GRSP varied among aggregate fractions, and N addition had variable effects on the distribution of GRSP in aggregate fractions. The EE-GRSP content in the macro-aggregates increased initially and then decreased with increasing N addition levels, having a peak value of 0.480 mg/g at 6 g N–2 y–1. The micro-aggregates had the lowest EE-GRSP content (0.148 mg/g) at 6 g N–2 y–1. Furthermore, the T-GRSP content significantly increased in the aggregate fractions with the N addition levels. (3) The macro-aggregate had the highest SOC content, followed by the micro-aggregate and the clay–silt aggregate had the lowest SOC content. N addition significantly increased the SOC content in all the aggregate fractions. (4) GRSP and SOC contents were not significantly correlated with MWD. Conclusion: The distributions of GRSP and SOC varied with aggregate fractions. GRSP and SOC contents increased by N addition, but this increase did not enhance aggregate stability in short term, and the improvement of stability might depend on binding agents and incubation time.

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Nitrogen addition increases the contents of glomalin-related soil protein and soil organic carbon but retains aggregate stability in a Pinus tabulaeformis forest

PeerJ ◽

10.7717/peerj.5039 ◽

2018 ◽

Vol 6 ◽

pp. e5039 ◽

Cited By ~ 7

Author(s):

Lipeng Sun ◽

Hang Jing ◽

Guoliang Wang ◽

Guobin Liu

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Aggregate Stability ◽

Soil Aggregate ◽

Pinus Tabulaeformis ◽

N Addition ◽

Short Term ◽

Fine Material ◽

Aggregate Fractions ◽

Soil Protein

Background Glomalin-related soil protein (GRSP) and soil organic carbon (SOC) contribute to the formation and stability of soil aggregates, but the mechanism by which global atmospheric nitrogen (N) deposition changes soil aggregate stability by altering the distribution of GRSP and SOC in different aggregate fractions remains unknown. Methods We used a gradient N addition (0–9 g N m−2 y−1) in Pinus tabulaeformis forest for two years in northeast China and then examined the changes in SOC contents, total GRSP (T-GRSP), and easily extractable GRSP (EE-GRSP) contents in three soil aggregate fractions (macro-aggregate: >250 μm, micro-aggregate: 250–53 μm, and fine material: <53 μm) and their relationship with aggregate stability. Results (1) The soil was dominated by macro-aggregates. Short term N addition had no significant effect on mean weight diameter (MWD) and geometric mean diameter (GMD). (2) GRSP varied among aggregate fractions, and N addition had different effects on the distribution of GRSP in aggregate fractions. The EE-GRSP content in the macro-aggregates increased initially and then decreased with increasing N addition levels, having a peak value of 0.480 mg g−1 at 6 g N m−2 y−1. The micro-aggregates had the lowest EE-GRSP content (0.148 mg g−1) at 6 g N m−2 y−1. Furthermore, the T-GRSP content significantly increased in the aggregate fractions with the N addition levels. (3) The macro-aggregate had the highest SOC content, followed by the micro-aggregate and the fine material had the lowest SOC content. N addition significantly increased the SOC content in all the aggregate fractions. (4) GRSP and SOC contents were not significantly correlated with MWD. Conclusion Glomalin-related soil protein and SOC contents increased by N addition, but this increase did not enhance aggregate stability in short term, and the improvement of stability might depend on binding agents and incubation time.

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