Carbon and nitrogen content in granulometric fractions of organic matter in soil aggregates under no-tillage and conventional tillage planting systems for onions

Santos, Luiz Henrique dos; Loss, Arcângelo; Canton, Ludiana; Souza, Monique; Ferreira, Guilherme Wilbert; Kürtz, Claudinei; Brunetto, Gustavo; Lourenzi, Cledimar Rogério; Lovato, Paulo Emílio; Comin, Jucinei José

doi:10.4067/s0718-34292018005002001

Cited by 5 publications

(7 citation statements)

References 13 publications

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“…There were no differences in POC and POCst between most managed and reference areas at all layers, with the exception of 0.05-0.10 m layer in O40G1, where POC and POCst were significantly higher than values at the reference areas (Table 3). These results indicate increased carbon fraction and stock due to the addition of high volume of crop residues with a low C/N ratio (Mattei et al, 2018;Piano et al, 2017;Piano et al, 2019), climatic factors (Gonçalves et al, 2011), and preservation of soil structure (Santos et al, 2018). .55 b Note: Values with the same lowercase letters in the columns are not significantly different from the reference values using Dunnett test at a 5% probability level.…”

Section: Total Organic Carbon Physical Granulometric Fractions and mentioning

confidence: 85%

“…As such, to obtain higher MOC levels, higher POC levels and greater activity of soil microbes are essential. Therefore, the evaluated management systems may have contributed to the recovery of MOC due to the higher POC levels observed in this study (Santos et al, 2018).…”

Section: Total Organic Carbon Physical Granulometric Fractions and mentioning

confidence: 87%

“…According to previous studies (Rossi et al, 2012a;2012b;Santos et al, 2018), MOC, unlike COP, is less sensitive to changes related to soil management systems, particularly short-term changes, indicating the need for longer production cycles to verify the real contribution of carbon levels to this fraction. Loss et al (2014) reported a negative linear correlation between the formation of physical granulometric fractions.…”

Section: Total Organic Carbon Physical Granulometric Fractions and mentioning

confidence: 95%

“…At deep soil layers, however, there were no differences in MOC and MOCst between the managed and haying areas. Differences in MOC and MOCst between the managed areas and forest may be related to the greater stability of and shorter time to recover this fraction (Santos et al, 2018). This is due to the substitution of native vegetation by conventional agricultural production systems, removal of aboveground residues, movement and excessive soil preparation with mechanical breakdown of aggregates, and low deposition of crop residues, all of which contribute to carbon loss over the years (Lima et al, 2015).…”

Section: Total Organic Carbon Physical Granulometric Fractions and mentioning

confidence: 99%

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Chemical Properties and Physical Fractions of Organic Matter in Oxisols Under Integrated Agricultural Production Systems

Rego¹,

Oliveira²,

Piano³

et al. 2020

Rev. Agric. Neotrop.

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The main cause of decreased soil fertility and soil organic matter content is intensive crop farming with inadequate management. This study aimed to evaluate soil chemical properties, total organic carbon content, physical granulometric fractions (particulate organic carbon and mineral-associated organic carbon), carbon stocks, and carbon management indices of oxisols in different integrated agricultural production systems (IAPSs) with reference to values in a haymaking area and native forest. The experiments were performed using completely randomized design, considering nine differently managed areas, including seven IAPSs and two reference areas (haymaking area and native forest); four soil samples from the 0.00-0.05, 0.05-0.10, and 0.10-0.20 m layers were randomly collected from each area and the abovementioned variables were evaluated. The results showed no differences in variables between the managed and reference areas, indicating the maintenance of fertility and carbon fractions. Therefore, the tested management strategies promote beneficial modifications of soil properties. Producers should adopt different IAPS management strategies for soil preservation.

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Section: Total Organic Carbon Physical Granulometric Fractions and mentioning

confidence: 85%

Section: Total Organic Carbon Physical Granulometric Fractions and mentioning

confidence: 87%

Section: Total Organic Carbon Physical Granulometric Fractions and mentioning

confidence: 95%

Section: Total Organic Carbon Physical Granulometric Fractions and mentioning

confidence: 99%

See 2 more Smart Citations

Chemical Properties and Physical Fractions of Organic Matter in Oxisols Under Integrated Agricultural Production Systems

Rego¹,

Oliveira²,

Piano³

et al. 2020

Rev. Agric. Neotrop.

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“…The lower MON contents found in aggregates of the 0-5 and 10-20 cm layers in T1 and T7, and of the 5-10 cm layer in T1 may be due to the contribution of this nutrient to the two treatments only by soil mineral fertilization and residues of natural vegetation. In addition, T7 also presented breaking of the soil structure, which made the previously protected MON in aggregates able to be consumed by microorganisms or lost in the environment (Santos et al, 2018a).…”

Section: Mon In Bulk Soil and Macroaggregatesmentioning

confidence: 99%

Combinations of Plant Species for Rotation With Onion Crops: Effects on the Light Fraction, Carbon, and Nitrogen Contents in Granulometric Fractions of the Soil Organic Matter

Giumbelli¹,

Loss²,

Kürtz³

et al. 2021

JAS

Self Cite

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The conversion of conventional tillage system (CTS) into no-tillage system (NTS) for onion crops with use of soil cover crops increases carbon and nitrogen contents in the soil aggregates. The objective of this work was to evaluate the effects of combinations of different plant species and soil management systems using rotation with soil cover crops for onion crops on the light organic matter (LOM), carbon (C), and nitrogen (N) contents in the organic matter granulometric fractions in soil macroaggregates and bulk soil. A nine-year experiment (2007-2016) was conducted using the treatments (T): maize-onion in NTS (T1); soil cover crops (winter)-onion in NTS(T2); maize-winter grasses-onion in NTS (T3); velvet bean-onion in NTS (T4); millet-soil cover crops (winter)-onion in NTS (T5); velvet bean-rye-onion in NTS (T6); maize-onion in CTS (T7); intercropped soil cover crops (summer)-onion in NTS (T8). C and N contents in the LOM, particulate organic C and N (POC and PON), and mineral- associated C and N (MOC and MON) were evaluated in soil macroaggregates (8.0 to 2.0 mm) and bulk soil (<2.0 mm) from the 0–5 cm, 5–10 cm, and 10–20 cm layers. High diversity and combinations of plant species in T2-T6, and T8 resulted in higher POC and MON contents in aggregates, and higher MOC and PON contents in bulk soil, when compared to T1 and T7. T2 was a better option to increase LOM and POC contents in aggregates (0-5 cm). The evaluation of POC (0–5 cm), PON, and MON (0-10 cm) contents in soil aggregates showed more significant differences between the treatments than the contents found in bulk soil. The onion crops under NTS combined with use of rotations with soil cover crops were more efficient to improve the evaluated soil attributes than those under CTS.

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Aggregation and dynamics of soil organic matter under different management systems in the Brazilian Cerrado

et al. 2021

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The objectives of this study were to evaluate the stability of aggregates, and quantify the contents and stocks of total organic carbon (TOC), and granulometric and humic fractions of soil organic matter (SOM). Four management systems were evaluated: (1) a no-tillage system (NTS) implemented 5 years ago (NTS5); (2) NTS implemented 17 years ago (NTS17); (3) conventional tillage system (CTS) implemented 20 years ago (CTS20); and (4) native Cerrado vegetation. For each system, five undeformed and five deformed soil samples were collected from the 0.00–0.05, 0.05–0.10, 0.10–0.20, and 0.20–0.40 m layers. The weighted mean diameter (WMD), TOC, stock of carbon (StockC), organic carbon particulate (OCp), organic carbon associated with minerals (OCam), stock of OCp, stock of OCam, carbon stock index, carbon management index (CMI), organic carbon in the fulvic acid fraction (FAF), humic acid fraction (HAF), and humin fraction were quantified. The WMD and CMI values increased as the soil management intensity decreased. The adoption of the NTS increased the WMD and the contents, stocks, and proportions of TOC in the more labile granulometric and humic (FAF/HAF) fractions of the SOM. The WMD, CMI, granulometric and chemical fractionation of the SOM were more efficient than the TOC and StockC in identifying the differences between the management systems. Due to the higher contents of the more labile fractions of SOM, the granulometric and chemical fractionation of SOM in the NTS5 and NTS17 systems had higher values of WMD and CMI than the CTS20 system.

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Carbon and nitrogen content in granulometric fractions of organic matter in soil aggregates under no-tillage and conventional tillage planting systems for onions

Abstract: Contenido de carbono y nitrógeno en fracciones granulométricas de materia orgánica en agregados de suelo sin labranza y sistemas convencionales de siembra para cebollas

Cited by 5 publications

References 13 publications

Chemical Properties and Physical Fractions of Organic Matter in Oxisols Under Integrated Agricultural Production Systems

Chemical Properties and Physical Fractions of Organic Matter in Oxisols Under Integrated Agricultural Production Systems

Combinations of Plant Species for Rotation With Onion Crops: Effects on the Light Fraction, Carbon, and Nitrogen Contents in Granulometric Fractions of the Soil Organic Matter

Aggregation and dynamics of soil organic matter under different management systems in the Brazilian Cerrado

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