How 23-year Continuous Soybean Cultivation Led to More SOC and Thermal Energy Stored in Mollisol Micro-Aggregates

Qiao, Yunfeng; Miao, Shiding; Yue, Shuping; Wu, Haiyan; Han, Xiaofei

doi:10.15244/pjoes/61628

Cited by 4 publications

(8 citation statements)

References 28 publications

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“…Qiao et al [33] suggested that micro-aggregates played key roles in protecting SOC based on more recalcitrant SOC stored in micro-aggregates. However, higher organic carbon content in the macroaggregates (> 2 mm fraction) compared to the micro-aggregates ( 0.2 mm fraction) in our results, that was similar to previous studies [19], which observed that when organic inputs were increased in a calcareous soil, a greater proportion of stable macro-aggregate (> 250um) would be formed in comparison to a non-calcareous soil of similar characteristics.…”

Section: Discussionmentioning

confidence: 99%

“…Mean weight diameter (MWD) of water stable aggregates has been recognized as an important indicator on the capability of the soil to resist against water erosional forces. Meanwhile, stable aggregate played an important role in the stabilization of SOC [33]. Micro-aggregates are bound together by young organic matter into larger macro-aggregates and a breakdown of macro-aggregates results in a release of labile SOM [4].…”

Section: Introductionmentioning

confidence: 99%

“…Micro-aggregates are bound together by young organic matter into larger macro-aggregates and a breakdown of macro-aggregates results in a release of labile SOM [4]. It is generally accepted that the stability of SOC in soil aggregates is closely related to the protection of aggregate structure from microbial decomposition [33].…”

Section: Introductionmentioning

confidence: 99%

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Soil Aggregates Stability and Carbon Density Under Three Plantations on Loess Plateau, China

Dong¹,

Kou²

2020

Preprint

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[Background] This paper aimed to research the influence of types of plantations on soil aggregate stability and carbon density. The soils of Robinia pseudoacacia, Pinus tabulaeformis and M. pumila plantations were selected as the research objects in the south of Loess Plateau. The mass percentages of soil water stable aggregates with different sizes were measured by fast wetting method, and then, the mean weight diameter (MWD) was calculated to asses soil aggregate stability. Soil organic carbon, inorganic carbon and bulk density were analyzed using traditional analysis methods. The roles played by soil organic and inorganic carbon in the formation of water stable aggregates were discussed. [Results] The content of soil organic carbon and MWD was significantly higher in P. tabuliformis plantation compared with R. pseudoacacia and M. pumila plantations. Conversely, the content of soil calcium carbonate and total carbon density was the lowest in P. tabuliformis plantation. Soil organic carbon was the highest at the surface soils (0-10 cm), which was 2.21-3.96, 2.10-3.00 and 1.65-2.53 times compared with subsurface soils in Robinia pseudoacacia, Pinus tabulaeformis and M. pumila plantations respectively. While soil carbonate calcium and inorganic carbon density fluctuated with the increasing of soil layers. Aggregate organic carbon increased while carbonate calcium content decreased with the increasing of aggregate size respectively. [Conclusion] We concluded that: (1) P. tabuliformis played a more important role in soil organic carbon sequestration compared with R. pseudoacacia and M. pumila; (2) there was a threshold value of carbonate calcium content, when it was lower or higher than this threshold, it had positive or negative correlation with MWD; (3) bigger water stable aggregates had higher soil organic matter and lower carbonate calcium.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Soil Aggregates Stability and Carbon Density Under Three Plantations on Loess Plateau, China

Dong¹,

Kou²

2020

Preprint

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“…4.4Aggregate-SOM content increased with increasing aggregate size Qiao et al(2016) suggested that micro-aggregates played key roles in protecting SOC based on more recalcitrant SOC stored in micro-aggregates. However, higher organic carbon content in the macro-aggregates (>2mm fraction) compared to the micro-aggregates (<0.2 mm fraction) in our results, that was similar to previous studies (Fernandez-Ugalde et al,2011), which observed that when organic inputs were increased in a calcareous soil, a greater proportion of stable macro-aggregate (>250um) would be formed in comparison to a non-calcareous soil of similar characteristics.…”

Section: Aggregate-caco 3 Content Decreased With Increasing Aggregate Sizementioning

confidence: 96%

“…It was believed that the SOC content played an important role in the soil aggregation (Nie et al, 2017). Meanwhile, stable aggregate played an important role in the stabilization of SOC (Qiao et al, 2016). It is generally accepted that the stability of SOC in soil aggregates due to the protection of aggregate structure from microbial decomposition (Qiao et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Soil Carbon density and Aggregates Stability under Three Types' Plantation Trees on Weibei Dryland, China

Dong¹,

Kou²

Authorea

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Afforestation has been implemented on a large scale in the Loess Plateau of China since 1999. This paper aimed to judge the influence of plantation tree types on soil aggregate stability and carbon stocks. The results showed that : (1)the content of soil organic matter and macro-aggregates, the water stability of aggregates were significantly higher in P. tabuliformis plantation compared with R. pseudoacacia and M. pumila plantations, conversely, the content of soil calcium carbonate in P. tabuliformis plantation was the lowest; (2) the content of soil organic matter and organic carbon density were significantly negatively correlated with soil depth, while soil carbonate calcium and in-organic carbon density fluctuated with the increasing of soil depth; (3) compared with topsoil, subsoil was important carbon sink because there were more in-organic carbon; (4) Aggregate organic carbon increased while inorganic carbon decreased with the increasing of aggregate size respectively. We concluded that: (1) R. pseudoacacia played a more important role in soil carbon sequestration compared with P. tabuliformis; while P. tabuliformis was more beneficial to improve soil organic matter and soil structure; (2) subsoil and in-organic carbon were important carbon sinks compared with topsoil and organic carbon; (3) the bigger water stable aggregates having the higher content of soil organic matter and the lower carbonate calcium.

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Biomass Storage Potential and Improvement in Soil Properties under Different Bamboo Plantations in the Terai Region of Central Himalaya

Sharma,

Kumar,

N.R.

et al. 2024

Colomb. for.

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This study evaluates six bamboo species, i.e., Dendrocalamus hamiltonii, Bambusa nutans, Dendrocalamus asper, Bambusa bambos, Bambusa balcooa, and Dendrocalamus strictus, regarding their growth behavior, nutrient uptake, and effect on the soil properties of the Terai region. Various aboveground growth parameters exhibited significant variations with the maximum clump girth (8.60 m) and internodal length (35.37 cm) of B. nutans, which was also reported by the culm diameter (5.70 cm) of D. hamiltonii and the number of culms per clump (65) of D. strictus. The total aboveground biomass ranged from 51.14 Mg.ha-1 in D. asper to 362.56 Mg.ha-1 in D. hamiltonii. The most significant variation in soil properties was observed in the 0-40 cm soil layer. Under D. hamiltonii, the lowest soil bulk density (1.07 g.cm3; 1.21 g.cm3) and the maximum soil porosity (59.00%; 56.40%), soil organic carbon (1.54%; 0.72%), and available soil nitrogen (228.29 kg.ha-1; 173.73 kg.ha-1) were found the 0-40 and 40-80 cm soil layers. Furthermore, significant enhancements in soil microbial population were recorded. Thus, bamboo plantations have great potential to enhance the biomass generation and fertility quotient of fallow lands.

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How 23-year Continuous Soybean Cultivation Led to More SOC and Thermal Energy Stored in Mollisol Micro-Aggregates

Cited by 4 publications

References 28 publications

Soil Aggregates Stability and Carbon Density Under Three Plantations on Loess Plateau, China

Soil Aggregates Stability and Carbon Density Under Three Plantations on Loess Plateau, China

Soil Carbon density and Aggregates Stability under Three Types' Plantation Trees on Weibei Dryland, China

Biomass Storage Potential and Improvement in Soil Properties under Different Bamboo Plantations in the Terai Region of Central Himalaya

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