Long-term fertilisation reveals close associations between soil organic carbon composition and microbial traits at aggregate scales

Duan, Yan; Lin, Chunye; Zhang, Jiabao; Li, Daming; Han, Xianpei; Zhu, Bo; Li, Yan; Zhao, Bin; Huang, Ping

doi:10.1016/j.agee.2020.107169

Cited by 49 publications

(18 citation statements)

References 70 publications

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“…Wang et al (2016) and Zheng et al (2021) found that the conversion of wasteland to orchard can alter the quantity and quality of C resource inputs, and subsequently affect SOC composition and lability through soil microbial community. Our results (Figure 5) confirmed these findings and revealed that bacterial community, rather than fungal community, could influence SOC quality/lability (as indicated by the values of LI) through microbial functions (i.e., enzymes; Guo et al, 2018;Duan et al, 2021). In accordance with previous studies (Hu et al, 2021;Lyu et al, 2021), we also found that with an increase in soil depths, the SOC stocks and their lability/quality decreased gradually (Tables 1, 2).…”

Section: Variations In Soil Extracellular Enzyme Activitiessupporting

confidence: 91%

Successive walnut plantations alter soil carbon quantity and quality by modifying microbial communities and enzyme activities

et al. 2022

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Knowledge of the spatial–temporal variations of soil organic carbon (SOC) quantity and quality and its microbial regulation mechanisms is essential for long-term SOC sequestration in agroecosystems; nevertheless, this information is lacking in the process of walnut plantations. Here, we used the modified Walkley-Black method, phospholipid fatty acid analysis, and micro-plate enzyme technique to analyze the evolution of SOC stocks and quality/lability as well as microbial communities and enzyme activities at different soil depths in walnut plantations with a chronosequence of 0-, 7-, 14-, and 21-years in the Eastern Taihang Mountains, China. The results indicated that long-term walnut plantations (14-and 21-years) enhanced SOC stocks, improved SOC quality/lability (as indicated by the lability index), and promoted microbial growth and activities (i.e., hydrolase and oxidase activities) in the 0–40 cm soil layers. Besides, these above-mentioned SOC-and microbial-related indices (except for oxidase activities) decreased with increasing soil depths, while oxidase activities were higher in deeper soils (40–60 cm) than in other soils (0–40 cm). The partial least squares path model also revealed that walnut plantation ages and soil depths had positive and negative effects on microbial attributes (e.g., enzyme activities, fungal and bacterial communities), respectively. Meanwhile, the SOC stocks were closely related to the fungal community; meanwhile, the bacterial community affected SOC quality/liability by regulating enzyme activities. Comprehensively, long-term walnut plantations were conducive to increasing SOC stocks and quality through altering microbial communities and activities in the East Taihang Mountains in Hebei, China.

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Section: Variations In Soil Extracellular Enzyme Activitiessupporting

confidence: 91%

Successive walnut plantations alter soil carbon quantity and quality by modifying microbial communities and enzyme activities

et al. 2022

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“…Blanco-Moure et al (2016) revealed that the long persistence of MSC outside and within microaggregates constitutes about 80% of the total SOC, making this fraction of particular interest in SOC sequestration. However, some previous studies found that organic manure had no or very little effect on aggregateassociated MSC (Duan et al, 2021;Yu et al, 2012;Zhao et al, 2020). Though SOC turnover and sequestration are closely associated with those microbial or physical carbon fractions (e.g.…”

Section: Introductionmentioning

confidence: 93%

“…Cell envelope fragments and the by-products produced during microbial degradation are able to form intimate associations with soil minerals and then be incorporated into aggregates, for example coarse intra-particulate organic carbon (coarse iPOC; Rasse et al, 2005). The labile fractions, such as microbial biomass carbon (MBC) and intra-particulate organic carbon (iPOC), are very sensitive to fertilizer application, and the carbon contents in these fractions have generally been found to be greater in soils receiving organic manure compared to soils receiving mineral fertilizer or unamended soils (Duan et al, 2021;Modak et al, 2020). Meanwhile, as coarse iPOC decomposes into finer organic carbon, it becomes physically and/or chemically stabilized within the soil mineral component as mineral-incorporated organic carbon (MSC) (Blanco-Moure et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Soil organic carbon fractions and its association with water‐stable aggregates under different fertilization management practices

Zhao

Gao

et al. 2021

Soil Use and Management

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Agricultural soil organic carbon (SOC) plays a critical role in soil ecosystems, and SOC sequestration is a key ecosystem service. This study investigated the SOC fractions, including mineral-incorporated organic carbon (MSC), intraparticulate organic carbon (iPOC) and microbial biomass carbon (MBC), in bulk soil and water-stable aggregates, as influenced by soil fertilization managements, using three treatments: no fertilizer (CK), chemical fertilizer (FR) and organic manure (OM). Fertilizer application significantly increased SOC content and its fractions (MSC, iPOC and MBC) compared to CK, and the effect of organic manure amendment had more impact on the SOC accumulation than chemical fertilizer. Macroaggregate (>250 μm)associated SOC, MSC and iPOC (including fine and coarse iPOC) increased by 22%-283%, 18%-84% and 45%-232%, respectively, in FR and OM treatments compared with CK. In addition, the iPOC:MSC ratio values (%) within all size aggregates were all increased in the FR (about 84%-183%) and OM (about 103%-230%) treatments compared to CK (about 65%-146%).Meanwhile, MBC:SOC ratio values were the highest (about 2.16%-3.07%) in small macroaggregates (250-2000 μm), but decreased sharply (about 2%-2.35%) in large macroaggregates (>2000 μm) in different treatments. Our findings suggested that macroaggregates were the main sites of carbon sequestration and that carbon became more unstable with the increase of SOC in aggregates. Furthermore, the microbial biomass showed obvious differentiation characteristics in macroaggregates (>250 μm). Specifically, small macroaggregates (250-2000 μm) contained more microbial biomass, and large macroaggregates (>2000 μm) were inclined to inhibit microbial activity.

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“…Long-term winter cultivation of MV signi cantly (p < 0.05) increased the content of SOC in > 5 mm, 2-5 mm and < 0.25mm aggregates compared with winter fallow treatment (Yang et al 2014). The combined application of manure and NPK fertilizer consistently increased the SOC content in 0.25-2 mm and 0.053-0.25 mm aggregates, compared to NPK fertilizer (Duan et al 2021). SOC concentrations of 0.25-2 mm and 0.053-0.25 mm under chemical fertilizer reduced by MV were 18.0% and 11.2% higher than control treatment (Kamran et al 2021).…”

Section: Introductionmentioning

confidence: 84%

Effects of substitution of chemical fertilizer by Chinese milk vetch on distribution and composition of aggregates-associated organic carbon fractions in paddy soils

Nie

Geng

et al. 2022

Plant Soil

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Green manure plays a key role in reducing chemical fertilizer applications and increasing soil organic carbon (SOC) stock. The effects of chemical fertilizer substitution by Chinese milk vetch (MV) on the distribution and composition of organic carbon fractions in macroaggregates and microaggregates and SOC stability mechanism were investigated in a paddy soil in southern China. A 11-year (2008-2018) eld experiment was conducted, including no fertilizer (CK), 100% NPK fertilizer (F100), MV with different percentages of chemical fertilizer (MV + F100, MV + F80, MV + F60 and MV + F40). The soil was separated into distinct organic carbon fractions using aggregate density fractionation and SOC chemical structure was analyzed by fourier-transform infrared and nuclear magnetic resonance. Methods ResultsChemical fertilizer substitution by MV increased SOC contents in the bulk soil by 9.07% (MV + F80), 5.08% (MV + F60), 17.93% (MV + F40) compared to F100. Organic carbon fraction mainly existed in mSOC, accounting for 70.28-83.70% and 69.43-83.97% of the relative mass of macroaggregates and microaggregates, respectively. Compared to F100, aromatic C increased by 11.59% and 29.06% under MV + F60 within mSOC in macroaggregates and microaggregates. Within the mSOC in macroaggregates, compared to CK, MV + F80 and MV + F60 promoted the proportion of alkyl C by 9.61% and 6.69%, and decreased the content of O-alkyl C by 14.10% and 11.03%, respectively, which correspondingly increased alkyl C/O-alkyl C ratio. ConclusionsSubstitution of chemical fertilizer by MV (especially MV + F80 and MV + F60) improved the stability of SOC via increasing recalcitrant structure in mSOC, and was conducive to the sequestration of SOC in paddy soils.

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Long-term fertilisation reveals close associations between soil organic carbon composition and microbial traits at aggregate scales

Cited by 49 publications

References 70 publications

Successive walnut plantations alter soil carbon quantity and quality by modifying microbial communities and enzyme activities

Successive walnut plantations alter soil carbon quantity and quality by modifying microbial communities and enzyme activities

Soil organic carbon fractions and its association with water‐stable aggregates under different fertilization management practices

Effects of substitution of chemical fertilizer by Chinese milk vetch on distribution and composition of aggregates-associated organic carbon fractions in paddy soils

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