Impact of conservation practices on soil aggregation and the carbon management index after seven years of maize–wheat cropping system in the Indian Himalayas

Ghosh, B. N.; Meena, Vijay Singh; Alam, N. M.; Dogra, Pradeep; Bhattacharyya, Ranjan; Sharma, N. K.; Mishra, P. K.

doi:10.1016/j.agee.2015.09.038

Cited by 129 publications

(51 citation statements)

References 37 publications

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“…Moreover, the close relationship of these C indices with physical, chemical and biological soil properties confirms their usefulness as soil quality indicators, as well as their high sensitivity to soil changes due to management systems. Few studies have examined the relationship of CMI, SR-TOC and SR-LF with crop yield (Ghosh et al, 2016;Vieira et al, 2007). In this work, we found a poor relationship (p > 0.17) between soil C indices and maize yield (average of five crop seasons, 2001-2005) ( Table 6).…”

Section: Carbon Stratification Ratiomentioning

confidence: 62%

Carbon indices to assess quality of management systems in a Subtropical Acrisol

Zanatta

Vieira

Briedis

et al. 2019

Sci. agric. (Piracicaba, Braz.)

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Management systems to improve soil quality are essential for agricultural and environmental sustainability. We assessed the quality of soil management systems applied to a subtropical Acrisol in terms of the carbon management index (CMI), the stratification ratio for total organic carbon (SR-TOC) and light fraction of organic matter (SR-LF). In addition, we examined their relationship to chemical, physical and biological soil quality indicators, as well as to maize yield. The study was conducted on a long-term experiment (18 years) in southern Brazil involving two different systems [no tillage (NT) and conventional tillage (CT)], two cropping systems [black oat/maize (O/M) and black oat + vetch/maize + cowpea (OV/MC)] and two nitrogen fertilizer rates for maize (0 and 180 kg ha-1). Based on the three indices, the best managements for soil quality comprised NT (50-212 % better than CT), legume cover crops (10-47 % better than O/M) and N fertilization (8-33 % better than no fertilizer). All three indices proved accurate to assess the impact of soil management systems, especially SR-LF, which showed increased sensitivity and close relationships with chemical, physical and biological soil quality indicators. On the other hand, a poor relationship was observed between soil C indices and maize yield, which was improved only by legume cover crops and N fertilization. The results showed that the association of no-till system to an abundant supply of crop residues is key to ensure high soil quality and crop yields in humid subtropical regions.

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Section: Carbon Stratification Ratiomentioning

confidence: 62%

Carbon indices to assess quality of management systems in a Subtropical Acrisol

Zanatta

Vieira

Briedis

et al. 2019

Sci. agric. (Piracicaba, Braz.)

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“…LOC was determined by using 333 mmol L −1 KMnO 4 Oxidation Method, and measured by the spectrophotometric of 565 nm wave length 65 . The total SOC was considered as equal to the total soil carbon because the measured inorganic carbon (carbonates) contents of the samples were almost nil 66 . Carbon Management Index (CMI) was calculated using the procedure outlined below 65 , 66 , using the no-reclamation forest soil as reference sample: …”

Section: Methodsmentioning

confidence: 99%

Variation of soil organic carbon and physical properties in relation to land uses in the Yellow River Delta, China

Jiao

et al. 2020

Sci Rep

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Soil physical properties and soil organic carbon (SOC) are considered as important factors of soil quality. Arable land, grassland, and forest land coexist in the saline-alkali reclamation area of the Yellow River Delta (YRD), China. Such different land uses strongly influence the services of ecosystem to induce soil degradation and carbon loss. The objective of this study is to evaluate the variation of soil texture, aggregates stability, and soil carbon affected by land uses. For each land use unit, we collected soil samples from five replicated plots from “S” shape soil profiles to the depth of 50 cm (0–5, 5–10, 10–20, 20–30, and 30–50 cm). The results showed that the grassland had the lowest overall sand content of 39.98–59.34% in the top 50 cm soil profile. The content of soil aggregates > 0.25 mm (R0.25), mean weight diameter and geometric mean diameter were significantly higher in grassland than those of the arable and forest land. R0.25, aggregate stability in arable land in the top 30 cm were higher than that of forest land, but lower in the soil profile below 20 cm, likely due to different root distribution and agricultural practices. The carbon management index (CMI) was considered as the most effective indicator of soil quality. The overall SOC content and CMI in arable land were almost the lowest among three land use types. In combination with SOC, CMI and soil physical properties, we argued that alfalfa grassland had the advantage to promote soil quality compared with arable land and forest land. This result shed light on the variations of soil properties influenced by land uses and the importance to conduct proper land use for the long-term sustainability of the saline-alkali reclamation region.

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“…The greatest AAGR of aggregate C concentration was observed in the 0.053-0.25 mm fraction (8.8%) under NT. One reason for this result could be that when the ability of particulate organic carbon to be a nucleation site for the formation of new aggregates was restricted in the steady aggregation state under notillage (Bossuyt et al 2004;Rabbi et al 2015;Song et al 2016), hydrolysable organic carbon probably became the major carbon source and was adsorbed or preserved by microaggregates (Ochoa et al 2009;Ghosh et al 2016). However, the higher AAGR of aggregate C concentration in microaggregates is probably due to multiple factors and needs to be further investigated, especially under NT.…”

Section: Aggregate-associated C Concentration Within Aggregate Fractionsmentioning

confidence: 99%

Inter-annual changes in the aggregate-size distribution and associated carbon of soil and their effects on the straw-derived carbon incorporation under long-term no-tillage

Yin

Zhao

Yan

et al. 2018

Journal of Integrative Agriculture

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Converting from conventional tillage to no-tillage influences the soil aggregate-size distribution and thus soil organic carbon (SOC) stabilization. However, the dynamics of soil aggregation and the straw-derived carbon(C) incorporation within aggregate fractions are not well understood. An experiment was established in 2004 to test the effects of two treatments, no-tillage with residue (NT) and conventional tillage without residue (CT), on the soil aggregate-size distribution and SOC stabilization in a continuous maize (Zea mays L.) cropping system located in the semiarid region of northern China. Soil samples were collected from the 0-10 cm layer in 2008, 2010 and 2015, and were separated into four aggregate-size classes (>2, 0.25-2, 0.053-0.25, and <0.053 mm) by wet-sieving. In each year, NT soil had a higher proportion of macroaggregates (i.e., >2 and 0.25-2 mm) and associated SOC concentration compared with CT. Additionally, to compare straw-derived C incorporation within NT and CT aggregate fractions, 13 C-labeled straw was incubated with intact NT and CT soils. After 90 days, the highest proportion of 13 C-labeled straw-derived C was observed in the >2 mm fraction, and this proportion was lower in NT than that in CT soil. Overall, we conclude that long-term continuous NT increased the proportion of macroaggregates and the C concentration within macroaggregates, and the physical protection provided by NT is beneficial for soil C sequestration in the continuous maize cropping system in semiarid regions of northern China.

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Impact of conservation practices on soil aggregation and the carbon management index after seven years of maize–wheat cropping system in the Indian Himalayas

Cited by 129 publications

References 37 publications

Carbon indices to assess quality of management systems in a Subtropical Acrisol

Carbon indices to assess quality of management systems in a Subtropical Acrisol

Variation of soil organic carbon and physical properties in relation to land uses in the Yellow River Delta, China

Inter-annual changes in the aggregate-size distribution and associated carbon of soil and their effects on the straw-derived carbon incorporation under long-term no-tillage

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