Effect of no-tillage and amendments on carbon lability in tropical soils

Nogueirol, Roberta Corrêa; Cerri, Carlos Eduardo Pellegrino; Silva, Wilson Tadeu Lopes da; Alleoni, Luís Reynaldo Ferracciú

doi:10.1016/j.still.2014.05.014

Cited by 13 publications

(6 citation statements)

References 36 publications

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“…Vieira et al (2007) found a positive relationship between the CMI and the physical, chemical and biological indicators of soil quality. Increases in CMI were also obtained in other studies as a result of practices such as the addition of organic matter via compost and sludge (Nogueirol et al, 2014), legume-based cropping systems and the addition of mineral N (Vieira et al, 2007), and green cane trash management (Blair et al, 1995).…”

Section: Carbon Management Indexsupporting

confidence: 66%

“…Furthermore, the magnitude of change in the labile organic carbon fraction was different from one to the other (Quanying et al, 2014). To resolve such issues, the carbon management index (CMI) has been used as a tool fort determining the state and rate of change in soil C of land use systems in an integrated manner (Blair et al, 1995;Nogueirol et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Relationships between labile soil organic carbon fractions under different soil management systems

Souza

Figueiredo

Sousa

2016

Sci. agric. (Piracicaba, Braz.)

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The study of labile carbon fractions (LCF) provides an understanding of the behavior of soil organic matter (SOM) under different soil management systems and cover crops. The aim of this study was to assess the effect of different soil management systems with respect to tillage, cover crop and phosphate fertilization on the amount of the LCF of SOM. Treatments consisted of conventional tillage (CT) and no-tillage (NT) with millet as the cover crop and a no-tillage system with velvet bean at two phosphorus dosages. Soil samples were collected and analyzed

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Section: Carbon Management Indexsupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Relationships between labile soil organic carbon fractions under different soil management systems

Souza

Figueiredo

Sousa

2016

Sci. agric. (Piracicaba, Braz.)

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“…The dynamic processes involved in the transformation of organic matter are highly sensitive to environmental conditions. In wet subtropical regions, organic matter decomposes at an annual rate of approximately 3.2%, over three times faster than in temperate zones (1.0%) (Nogueirol, Cerri, da Silva, & Alleoni, 2014). Changing from conventional tillage to zero-tillage alters the soil physical structure and influences the arrangement of solid particles (mineral and organic matter) and pores in which microbial decomposers, gases and soluble compounds are located (Mangalassery et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Long‐term zero‐tillage enhances the protection of soil carbon in tropical agriculture

Cooper

Sjögersten

Lark

et al. 2021

European J Soil Science

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Contrasting tillage strategies not only affect the stability and formation of soil aggregates but also modify the concentration and thermostability of soil organic matter associated with soil aggregates. Understanding the thermostability and carbon retention ability of aggregates under different tillage systems is essential to ascertain potential terrestrial carbon storage. We characterized the concentration and thermostability of soil organic carbon (SOC) within various aggregate size classes under both zero and conventional tillage using novel Rock-Eval pyrolysis. The nature of the pore systems was visualized and quantified by X-ray computed tomography to link soil structure to organic carbon preservation and thermostability. Soil samples were collected from experimental fields in Botucatu, Brazil, which had been under zero-tillage for 2, 15 and 31 years, and from adjacent fields under conventional tillage. Soils under zerotillage significantly increased pore connectivity whilst simultaneously decreasing interaggregate porosity, providing a potential physical mechanism for protection of SOC in the 0-20-cm soil layer. Changes in the soil physical characteristics associated with the adoption of zero-tillage resulted in improved aggregate formation compared to conventionally tilled soils, especially when implemented for at least 15 years. In addition, we identified a chemical change in composition of organic carbon to a more recalcitrant fraction following conversion to zero-tillage, suggesting aggregates were accumulating rather than mineralizing SOC. These data reveal profound effects of different tillage systems upon soil structural modification, with important implications for the potential of zero-tillage to increase carbon sequestration compared to conventional tillage.

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“…However, other studies detected only small differences in the chemical compositions of HS . For example, using 13 C cross-polarization/magic-angle spinning (CP/MAS) NMR, Nogueirol et al found that the HAs in tropical soils were structurally similar, irrespective of tillage systems or amendments (limestone, gypsum, compost, and sludge). Different humic fractions, such as HM and HA extracted from the surface horizon of the Bainsville soil, were also reported to have similar chemical compositions, as determined by CP/MAS NMR .…”

Section: Introductionmentioning

confidence: 99%

Demonstration of Chemical Distinction among Soil Humic Fractions Using Quantitative Solid-State¹³C NMR

Zhao

et al. 2019

J. Agric. Food Chem.

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Humic substances (HS) are vital to soil fertility and carbon sequestration. Using multiple cross-polarization/magic-angle spinning (multiCP/MAS) NMR combined with dipolar dephasing, we quantitatively characterized humic fractions, i.e., fulvic acid (FA), humic acid (HA), and humin (HM), isolated from two representative soils (upland and paddy soils) in China under six long-term (>20 years) fertilizer treatments. Results indicate that each humic fraction showed chemical distinction between the upland and paddy soils, especially with much greater aromaticity of upland HMs than of paddy HMs. Fertilizer treatment exerted greater influence on chemical natures of upland HS than of paddy HS, although the effect was less than that of soil type. Organic manure application especially decreased the percentages of aromatic C in the upland HAs and HMs compared with the control. We concluded that humic fractions responded in chemical nature to environmental conditions, i.e., soil type/cropping system/soil aeration and fertilizer treatments.

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Effect of no-tillage and amendments on carbon lability in tropical soils

Cited by 13 publications

References 36 publications

Relationships between labile soil organic carbon fractions under different soil management systems

Relationships between labile soil organic carbon fractions under different soil management systems

Long‐term zero‐tillage enhances the protection of soil carbon in tropical agriculture

Demonstration of Chemical Distinction among Soil Humic Fractions Using Quantitative Solid-State¹³C NMR

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Effect of no-tillage and amendments on carbon lability in tropical soils

Cited by 13 publications

References 36 publications

Relationships between labile soil organic carbon fractions under different soil management systems

Relationships between labile soil organic carbon fractions under different soil management systems

Long‐term zero‐tillage enhances the protection of soil carbon in tropical agriculture

Demonstration of Chemical Distinction among Soil Humic Fractions Using Quantitative Solid-State13C NMR

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Demonstration of Chemical Distinction among Soil Humic Fractions Using Quantitative Solid-State¹³C NMR