Evaluation of carbon mineralization and its temperature sensitivity in different soil aggregates and moisture regimes: A 21-year tillage experiment

Liu, Xiaotong; Li, Qiang; Tan, Senwen; Wu, Xueping; Song, Xiaojun; Gao, Huizhou; Han, Zixuan; Jia, Angyuan; Liang, Guopeng; Li, Shengping

doi:10.1016/j.scitotenv.2022.155566

Cited by 12 publications

(5 citation statements)

References 57 publications

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“…This result is probably due to the interaction between previous crop residues, soil temperature and water conditions under tillage practices. SOC mineralization is accelerated at higher temperatures and moisture levels, such as deep tillage, and SOC mineralization is lower under conservation tillage (SS and NT) than under conventional tillage and rotary tillage (Liu et al 2021). Otherwise, deep tillage increased the soil oxygen content, accelerating the decomposition of straw by microorganisms, and thus CO 2 emission was one of the pathways of soil carbon loss (Li et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Subsoiling tillage enhances wheat productivity, soil carbon and available nutrients status in dryland fields

Yan

Wu²,

Dong³

et al. 2022

Preprint

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Amis Additional tillage practices such as subsoiling (SS) and deep tillage (DT) during fallow period are beneficial to water storage and yield increases in dryland wheat fields compared with no tillage (NT). However, soil chemical characteristics responses to tillage practices that change within growth seasons are less understood. Methods This study evaluated the effects of three tillage practices (NT, SS and DT) on soil organic carbon (SOC), total nitrogen (TN), available nutrient and its relations with yield. Soil samples from five experimental years were analyzed to determine the contents of SOC, TN, and available nutrients. Soil samples from the fifth experimental year were analyzed to determine the soil aggregate and aggregate-associated C and N fractions. Results The SS and DP treatments favored grain yield, straw yield and straw carbon return compared to NT. In the whole profile (0–40 cm), the mean annual SOC stock and sequestration rate were 62.3, 59.4 and 38.5 t ha− 1 and + 0.73, + 0.59 and − 8.27 t ha− 1 yr− 1 under NT, SS and DT. The mean annual TN stock and sequestration rate were 5.45, 6.18 and 5.95 t ha− 1 and + 0.28, + 0.53 and + 0.67 t ha− 1 yr− 1 under NT, SS and DT. Higher SOC levels under SS and NT were associated with greater aggregate-associated C fractions. Similarly, soil available nutrients improved under NT and SS at 0–20 cm soil layer. Conclusions This result indicated that SS was an excellent practice for increasing wheat productivity, SOC, TN and nutrient availability synergistically in dryland wheat fields in North China.

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Section: Discussionmentioning

confidence: 99%

Subsoiling tillage enhances wheat productivity, soil carbon and available nutrients status in dryland fields

Yan

Wu²,

Dong³

et al. 2022

Preprint

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“…Nonetheless, ongoing research continues to investigate whether there are any general patterns between the biochemical recalcitrance of organic matter and its temperature sensitivity (Alves et al, 2021 ; Briones et al, 2021 ; Li et al, 2017 ; Liu et al, 2022 ; Moinet & Millard, 2020 ; Park et al, 2022 ; Reynolds et al, 2017 ). The role of biochemical recalcitrance attains particular importance under conditions where physical protection is necessarily less important, such as in organic soils, in the litter layer or in soils with limited mineral protective capacity like sandy soils.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, data from different geographical locations were collected to justify CQT by demonstrating a common negative correlation between Q 10 (Fierer et al, 2006 ) or activation energy (Craine et al, 2010 ) and the carbon quality index that was defined as the respiration rate at a reference temperature. Despite concern about the analysis raised previously (Reichstein et al, 2005 ), ongoing studies continue to frequently apply reasoning based on the CQT hypothesis to interpret temperature responses of soil carbon decomposition (Ghosh et al, 2020 ; Li et al, 2017 ; Liu et al, 2022 ; Yang et al, 2022 ; Yanni et al, 2020 ). It is thus warranted to reappraise the validity of experimental tests of the CQT hypothesis.…”

Section: Introductionmentioning

confidence: 99%

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The carbon‐quality temperature hypothesis: Fact or artefact?

Liang

Kirschbaum

Arcus

et al. 2022

Global Change Biology

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“…The positive correlation between clay, OM, and CEC reflect a typical soil dynamic in which clay and OM interact to form aggregates. In the aggregate structure, clay and OM are less exposed to water erosion (Zhu et al, 2022), and OM is less susceptible to rapid mineralization (Liu et al, 2022). This is particularly relevant in the Amazon, which experiences intense rainfall and high temperatures.…”

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confidence: 99%

Fertility and carbon stock in pasture and forest environments in the Southern Amazon

Silva,

S. Oliveira-Júnior

et al. 2024

Rev. bras. eng. agríc. ambient.

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Inadequate management of pasture soils in the Amazon has resulted in a predominance of degraded pastures. Considering the natural characteristics of this region can favor more appropriate strategies for sustainability, the objective of this study was to evaluate the differences in the chemical and physical attributes of pasture and forest soils in the Southern Amazon and to identify the most sensitive attributes of their fertility. Additionally, this study suggests appropriate management practices for sustainable pastures. Soil samples from the 0 to 0.20 m layer were analyzed to determine pH, exchangeable bases (calcium, magnesium, and potassium), exchangeable aluminum, potential acidity, phosphorus, organic carbon, bulk density, and texture. Pasture soils had a higher pH, calcium content, and bulk density than forest soils. However, the pasture soils had lower phosphorus and organic matter content. The soil organic carbon stocks were also lower in pasture soils, with levels 0.8 to 12 Mg ha-1 lower than in forest soils. The fertility attributes most sensitive to soil management in these pastures were phosphorus, pH, organic carbon, and bulk density. The lack of nutrients and soil and water conservation practices have contributed to the degradation of these pastures. Therefore, the recommended management for these pastures should aim to improve the organic matter content, reduce compaction, and replenish and cycle nutrients.

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Evaluation of carbon mineralization and its temperature sensitivity in different soil aggregates and moisture regimes: A 21-year tillage experiment

Cited by 12 publications

References 57 publications

Subsoiling tillage enhances wheat productivity, soil carbon and available nutrients status in dryland fields

Subsoiling tillage enhances wheat productivity, soil carbon and available nutrients status in dryland fields

The carbon‐quality temperature hypothesis: Fact or artefact?

Fertility and carbon stock in pasture and forest environments in the Southern Amazon

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