Long-term fertilization alters chemical composition and stability of aggregate-associated organic carbon in a Chinese red soil: evidence from aggregate fractionation, C mineralization, and 13C NMR analyses

Mustafa, Adnan; Xu, Hong‐Guang; Shah, Syed Atizaz Ali; Abrar, Muhammad; Maitlo, Ali Akbar; Kubar, Kashif Ali; Saeed, Qudsia; Kamran, Muhammad; Naveed, Muhammad; Wang, Boren; Sun, Nan

doi:10.1007/s11368-021-02944-9

Cited by 33 publications

(18 citation statements)

References 65 publications

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“…The mineralization rate of organic C in >2 mm aggregate was also significantly higher across aggregate fractions in bio-fertilizer-treated soil. These results were in line with that of Mustafa et al [8], who recorded higher C mineralization per unit of organic C in macro-aggregate. Similarly, Kan et al [6] found that organic C in macro-aggregate was the main source of mineralized C, of which >2 mm aggregate contributed 38.2-43.6% to the cumulative mineralization.…”

Section: Mineralization Of Organic C In Aggregatessupporting

confidence: 93%

“…Studies have demonstrated that long-term fertilization significantly affected SOC stability in different aggregate fractions [7][8][9], and mineralization of organic C would vary Agriculture 2022, 12, 1001 2 of 14 with soil aggregates [6,10]. The mineralization of C in small aggregates was vulnerable to soil conditions in an experiment in which soil types concluded Alfisols, Inceptisols, Mollisols and Ultisols [11].…”

Section: Introductionmentioning

confidence: 99%

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Trichoderma Bio-Fertilizer Decreased C Mineralization in Aggregates on the Southern North China Plain

et al. 2022

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Trichoderma bio-fertilizer is widely used to improve soil fertility and carbon (C) sequestration, but the mechanism for increasing C accumulation remains unclear. In this study, effects of Trichoderma bio-fertilizer on the mineralization of aggregate-associated organic C were investigated in a field experiment with five treatments (bio-fertilizer substitute 0 (CF), 10% (BF10), 20% (BF20), 30% (BF30) and 50% (BF50) chemical fertilizer nitrogen (N)). Aggregate fractions collected by the dry sieving method were used to determine mineralization dynamics of aggregate-associated organic C. The microbial community across aggregate fractions was detected by the phospholipid fatty acid (PLFA) method. The results indicated that Trichoderma bio-fertilizer increased organic C stock across aggregate fractions and bulk soil compared with CF. Cumulative mineralization of aggregate-associated organic C increased with the increasing bio-fertilizer application rate. However, the proportion of organic mineralized C was lower in the BF20 treatment except for <0.053 mm aggregate. Moreover, the PLFAs and fungal PLFA/bacterial PLFA first increased and then decreased with increasing bio-fertilizer application rates. Compared with CF, the increases of bacteria PLFA in >2 mm aggregate were 79.7%, 130.0%, 141.0% and 148.5% in BF10, BF20, BF30 and BF50, respectively. Similarly, the PLFAs in 0.25–2, 0.053–0.25 and <0.053 mm aggregates showed a similar trend to that in >2 mm aggregate. Bio-fertilizer increased the value of fungi PLFA/bacteria PLFA but decreased G+ PLFA/G− PLFA, and BF20 shared the greatest changes. Therefore, appropriate Trichoderma bio-fertilizer application was beneficial to improving soil micro-environment and minimizing risks of soil degradation.

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Section: Mineralization Of Organic C In Aggregatessupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Trichoderma Bio-Fertilizer Decreased C Mineralization in Aggregates on the Southern North China Plain

et al. 2022

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“…One cannot ignore the fact that in aggregates >5.0 mm in size, the protection of SOC can be due to the limitation of oxygen status and a decrease in the availability of water, the geometry of pores that limit the activity of decomposers (Bhattacharyya et al, 2021; Feng et al, 2018; Nichols & Halvorson, 2013; Rani, 2021; Semenov & Kogut, 2015). The strength of bonds between clay minerals and organic matter is another mechanism for stabilizing soil organic carbon (Hernandez‐Soriano et al, 2018; Mustafa et al, 2021; Singh & Benbi, 2021). The high content of silt and clay fractions in monoculture soils (silt + clay 83%) compared with the soils of crop rotation and control (silt + clay 54% and 53%, respectively) also determined the high physical protection of SOC in soil aggregates and the lowest mineralization activity.…”

Section: Discussionmentioning

confidence: 99%

Section: Biomass and Activity Of Microbial Communities Under Conditio...mentioning

confidence: 99%

Impact of agricultural land use on distribution of microbial biomass and activity within soil aggregates

Vasilchenko

Galaktionova

Tret’yakov

et al. 2022

Soil Use and Management

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The presence of aggregates of various sizes in the soil is an important condition for soil carbon sequestration. In this system, microbial biomass is a key link. This work was devoted to the study of the influence of land use systems on the distribution of SOС, MB-SIR, microbial activity and eco-physiological indices (qCO 2 , QR, MB-SIR/SOС and qCO 2 /SOС) in relation to the size of soil aggregates. The distribution of SOС, MB-SIR and mineralization activity among the aggregates was heterogeneous. In the soil of crop rotation, high mineralization activity and MB-SIR were found in the aggregates 0.5-0.1 mm, in the monoculture soil in aggregates <0.1 mm and in the control soil in the aggregates 1-0.25 mm. There was a general trend towards a decrease in microbial activity, MB-SIR and SOС availability with an increase in aggregate size. In agricultural soils, microbial activity was determined by large aggregates (>5 mm), while in the control soil, by the aggregates 5-1 mm. Depending on the type of site and the size of aggregates, the differences in microbial metabolism were revealed. The qCO 2 and QR values decreased, and the MB-SIR/SOС and qCO 2 /SOС increased in the series: control soil > crop rotation > monoculture. In the control soil, the values of the ecophysiological indices decreased with decreasing aggregate size. And vice versa, in agricultural soils, these parameters were the highest in the microaggregates (<0.25 mm). The monoculture soil, in contrast to the control soil and crop rotation soil, turned out to be more energy efficient.

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“…The results of least significant difference (LSD) multiple comparisons showed that with the increase of successive planting generations, the peak area integrals at 2929, 3423, and 3620 cm1 were significantly higher in the T2 and T3 treatments than in the T0 and T1 (p < 0.05), and the corresponding functional groups were attributed to aliphatic and phenolic alcohols [52]. The increase in the content of these functional groups was significantly correlated with plant root uptake and metabolism [53], indicating that the interaction between plant roots and soil remained active after the multi-generational succession [54][55]. One study showed that these substances are toxic and have a certain inhibitory effect on the growth of shrubs and weeds [56].…”

Section: Changes In Soil Organic Componentsmentioning

confidence: 99%

Assessment of the effects of multigenerational succession on soil chemical environment, fertility and enzyme activity in Eucalyptus plantations using structural equation modeling

Tang

Zhao

Shi

et al. 2022

Preprint

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Eucalyptus is a short-rotation tree species widely used in tropical and subtropical regions around the world. However, the high-intensity management mode of multi-generational succession has also made eucalyptus planting controversial due to ecological and environmental problems, including soil degradation and declines in stand biomass. This paper aims to reveal the effects of multi-generational succession of eucalyptus on soil fertility, organic structure, and biological properties. Soil samples were collected from eucalyptus plantations of different stand ages (5, 11, 17, and 21 years old) in a typical area in south Asia; soil organic fraction structure and content characteristics were investigated using Fourier transform infrared (FTIR); and structural equation modeling was used to explore the direct and indirect influences of soil fertility, enzyme activity, and organic fraction on stand biomass. The results showed that the soil fertility and enzymatic activity indexes were significantly different (p < 0.05) in different stand age soils, with the exception of total potassium and cellulase. FTIR analysis showed that 11 infrared absorption peaks existed in the soils of this study area, attributed to silicates, aromatics, carbonate ions, sugars, esters and polysaccharides, aliphatic hydrocarbons, and phenolic alcohols. Combined with the results of peak area integration, the content of esters (1088, 1165 cm1), aromatics (1631 cm1), and phenolic alcohols (3423 cm1) was significantly higher in 17- and 21-year-old stand soils than in control soils. The results of the structural equation model showed that organic components were negatively related (p < 0.01) to enzyme activity and biomass fertility, with standardized coefficients of 0.53 and 0.49, respectively. In summary, we concluded that multi-generation succession of eucalyptus trees can change the structure of soil organic functional group composition and promote the enrichment of aromatic and phenolic alcohol functional groups. The results of the structural equation modeling established the relationships between stand age and soil fertility, organic fraction, enzyme activity, and biomass. The increase in aromatic and phenolic alcohol functional groups was the main change in the organic fraction of the soil. Such changes can directly inhibit the increase in eucalyptus biomass and indirectly negatively affect biomass by inhibiting enzyme activity, and the combination of these two inhibitory pathways could be the main reason for the decline in stand biomass after successive plantings of eucalyptus.

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Long-term fertilization alters chemical composition and stability of aggregate-associated organic carbon in a Chinese red soil: evidence from aggregate fractionation, C mineralization, and 13C NMR analyses

Cited by 33 publications

References 65 publications

Trichoderma Bio-Fertilizer Decreased C Mineralization in Aggregates on the Southern North China Plain

Trichoderma Bio-Fertilizer Decreased C Mineralization in Aggregates on the Southern North China Plain

Impact of agricultural land use on distribution of microbial biomass and activity within soil aggregates

Assessment of the effects of multigenerational succession on soil chemical environment, fertility and enzyme activity in Eucalyptus plantations using structural equation modeling

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