Effects of contrasting soil management regimes on total and labile soil organic carbon fractions in a loess soil in China

Yang, Xueyun; Ren, Weidong; Sun, Benhua; Zhang, Shulan

doi:10.1016/j.geoderma.2012.01.033

Cited by 226 publications

(155 citation statements)

References 50 publications

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“…This relates to the increased readily available mineral N which alone or synergistically resulted in enhanced growth of vegetation and subsequently increased C inputs to the soil. The contradiction in CMI of the present study compared to Blair et al [36] and Yang et al [37] are ascribed to the differences in the rate of application and organic material quality. Unlike the sole low-to-medium organic residues incorporation in the GS, the relatively high application rate with rich dairy manure as observed in Blair et al [36] and Yang et al [37] induced shifts in C dynamics as a percentage of total C and that subsequently increased the CMI.…”

Section: Fertilization Type On Soil Microbial Biomass Indicatorscontrasting

confidence: 95%

Impacts of Fertilization Type on Soil Microbial Biomass and Nutrient Availability in Two Agroecological Zones of Ghana

et al. 2017

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Abstract:The decline in soil productivity amidst efforts to increase crop yield in Sub Saharan Africa (SSA) has made it imperative to assess the current fertilization management approaches. This study was conducted in two agroecological zones (i.e., Guinea Savannah (GS) and Deciduous forest (DF)) of Ghana to evaluate how different fertilization schemes in the long term (>5 years) impacted the soil biochemical properties. Soil samples under four fertilization schemes (inorganic fertilizer only, low-to-medium organic residues only, inorganic fertilizers plus low-to-medium organic residues, and no fertilization) from 20 farmers' field were sampled from March to April 2015. Soil biochemical quality indicators were determined using standard procedures. Overall, the average chemical and microbial biomass contents for most indicators were significantly higher in DF compared to GS. Relative to the reference sites, soil quality improvement were observed under inorganic fertilization in both agroecologies in contrast to significant soil deterioration (26.5%) under sole organic residue application in GS. Furthermore, the results showed that increased inorganic fertilization rate alone or combination with organic residues improved soil quality relative to the reference. The present results suggest the need to raise the current fertilizer application rates, especially in GS in order to enhance optimum soil productivity.

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Section: Fertilization Type On Soil Microbial Biomass Indicatorscontrasting

confidence: 95%

Impacts of Fertilization Type on Soil Microbial Biomass and Nutrient Availability in Two Agroecological Zones of Ghana

et al. 2017

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“…TOC content was in a direct relationship with the content of individual labile fractions. Yang et al (2012) recorded a high positive correlation between TOC and C L (r = 0.901; P < 0.01) in soil and Xue et al (2013) also between TOC and HWEOC. In this case, a positive correlation between TOC and C L in soil aggregates with the contents of all studied labile fractions of carbon (C L , CWEOC, HWEOC) in soil was recorded (Table 3).…”

Section: Resultsmentioning

confidence: 92%

“…The positive influence of stabile components of SOM (like humus substances) on the quality of soil and soil aggregates is evident (Bartlová et al 2015). However, according to Yang et al (2012), the labile pools of carbon also significantly affect the quality of soil and moreover they can be used to monitor the changes in SOM in a shorter time period. The lability of SOM depends on its chemical recalcitrance and physical protection against microbial activity (Sil-doi: 10.17221/182/2015-SWR veria et al 2008.…”

mentioning

confidence: 99%

Labile forms of carbon and soil aggregates

Tobiašová¹,

Barančíková²,

Gömöryová³

et al. 2016

Soil & Water Res.

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Tobiašová E., Barančíková G., Gömöryová E., Makovníková J., Skalský R., Halas J., Koco Š., Tarasovičová Z., Takáč J., Špaňo M. Soil organic matter (SOM) plays an important role in the soil aggregation and vice versa, its incorporation into the soil aggregates is one of the mechanisms of soil organic carbon stabilization. In this study the influence of labile carbon fractions on the fractions of dry-sieved (DSA) and wet-sieved (WSA) macro-aggregates and the relationship between the content of total organic carbon (TOC) and its labile fractions in the soil and in the fractions of macro-aggregates were determined. The experiment included six soil types (Eutric Fluvisol, Mollic Fluvisol, Haplic Chernozem, Haplic Luvisol, Eutric Cambisol, Rendzic Leptosol) in four ecosystems (forest, meadow, urban, and agro-ecosystem). In the case of DSA, the contents of labile fractions of carbon, in particular cold water extractable organic carbon (CWEOC) and hot water extractable organic carbon (HWEOC), had a higher impact on the proportions of larger fractions of macro-aggregates (3-7 mm), while in the case of WSA, the impact of labile fractions of carbon, mainly labile carbon (C L ) oxidizable with KMnO 4 , was higher on the proportions of smaller fractions of aggregates (0.25-1 mm). The WSA size fraction of 0.5-1 mm seems an important indicator of changes in the ecosystems and its amounts were in a negative correlation with C L (r = -0.317; P < 0.05) and HWEOC (r = -0.356; P < 0.05). In the WSA and DSA size fractions 0.5-1 mm, the highest variability in the contents of TOC and C L was recorded in the forest ecosystem > meadow ecosystem > urban ecosystem > agro-ecosystem. The higher were the inputs of organic substances into the soil, the greater was the variability in their incorporation into the soil aggregates. The influence of the content of TOC and its labile forms on their contents in the DSA and WSA was different, and the contents of TOC and C L in the aggregates were more significantly affected by the C L content than by water soluble carbon. In the case of WSA fractions, their carbon content was more affected in the 1-2 mm than in 0.5-1 mm fraction.

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“…As reduções desses teores nos sistemas cultivados foram de 20, 35 e 35% (0-5 cm), 27, 50 e 50 % (5-10 cm), 40, 50 e 50% (10-20 cm), 25, 50 e 50% (20-40 cm) e 66, 66 e 33% (40-60 cm), respectivamente, para MAC + PAST, MAC e PAST. Considerando os três sistemas e uma média por profundidade, tem-se os percentuais de 31, 33, 51, 44 e 37%, para o COT e de 30, 42, 46, 42 e 55% para C L , respectivamente, para as camadas 0-5, 5-10, 10-20, 20-40 e 40-60 cm, indicando que não houve, conforme reportado em alguns estudos (Silva et al, 2011;Yang et al, 2012), maior sensibilidade do carbono lábil em relação ao carbono orgânico total.…”

Section: Resultsunclassified

“…Outros compartimentos também podem ser utilizados como eficientes indicadores de qualidade do solo, como o carbono lábil, sugerido por Blair et al (1995) e que engloba todos os compostos que podem ser prontamente oxidados pelo KMnO 4 , como o material húmico lábil e os polissacarídeos e ainda respondem por 5-30% do carbono orgânico total (Yang et al, 2012 ; areia, argila e silte: 310, 480 e 210 g kg -1 , respectivamente. Foram estudados três sistemas de uso do solo, além de uma área sob vegetação nativa de cerrado (VN), formada predominantemente por árvores de pequeno porte (até 3 m) e arbustos e utilizada como referência de um estado de equilíbrio: monocultivo de macaúba (MAC): área, inicialmente sob floresta nativa de cerrado e, a partir do ano de 1996, sob macaúba, com aplicação, por ocasião do plantio, de 2 t ha -1 de calcário dolomítico e sem histórico de adubação; monocultivo de pastagem bem manejada (PAST): área originalmente sob floresta nativa de cerrado e substituída, no ano de 1994, pela Brachiaria brizantha (1,5 UA ha -1 ; 4,4 Mg ha -1 de massa seca), com adoção de preparo convencional do solo, aplicação de 4 t ha -1 de calcário dolomítico, PRNT e, a cada quatro anos, de 20 kg de N, 100 kg de P 2 O 5 e 100 kg de K 2 O por hectare; consórcio de macaúba e pastagem (MAC + PAST): área inicialmente sob floresta nativa de cerrado e, a partir de 1996, sob Brachiaria brizantha (0,75 UA ha -1 ; 4,2 Mg ha -1 de massa seca) e com histórico de calagem e adubação similar ao sistema PAST.…”

Section: Introductionunclassified

Qualidade química do solo e dinâmica de carbono sob monocultivo e consórcio de macaúba e pastagem

Leite

Arruda

Costa³

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMONeste trabalho objetivou-se avaliar o efeito do monocultivo e do consórcio de macaúba e pastagem sobre a qualidade química e os compartimentos de carbono em Latossolo Vermelho-Amarelo no Cerrado Maranhense. Foram estudados quatro sistemas de uso do solo: macaúba, pastagem, macaúba consorciada com pastagem e vegetação nativa de cerrado. Nesses sistemas foram coletadas amostras de solo da superfície até 60 cm, para determinação dos atributos químicos e dos teores e estoques de carbono orgânico do solo. Os maiores valores de P, K, Ca e Mg foram observados nas áreas sob pastagem. Os estoques de carbono orgânico total e os teores de carbono lábil foram maiores no solo com vegetação nativa até 60 cm de profundidade, seguida pelo sistema macaúba associada com pastagem. Maiores valores de carbono da biomassa microbiana e de quociente microbiano foram observados no solo sob pastagem em todas as camadas. A presença da pastagem é importante no consórcio com macaubeiras pois aumenta os níveis de fertilidade do solo e os estoques de carbono favorecendo a melhoria da qualidade do solo nas condições do cerrado maranhense. Palavras-chave: cerrado, oleaginosas, agrofloresta, fertilidade do solo, matéria orgânica do soloChemical quality of soil and dynamics of carbon under monoculture and intercroping of acrocomia palm and pasture ABSTRACT This study aimed to evaluate the effects of the cultivation of acrocomia palm (Acrocomia aculeata) intercropped or not with pasture on the chemical quality and carbon pools of an Oxisol of the Savanna of Maranhão state. Four land use systems were studied: acrocomia, pasture, acrocomia intercropped with pasture and savanna native vegetation. Soil samples were collected up to 60 cm depth for determination of chemical attributes and soil organic carbon contents and stocks. The highest values of P, K, Ca and Mg were observed in the soil under pasture. Total organic carbon stocks and labile carbon content were higher under native vegetation up to 60 cm followed by acrocomia intercropped with pasture system. Higher values of microbial biomass carbon and microbial quotient were verified in the soil under pasture in all depths. Pasture is important to be intercropped with acrocomia since it increases the soil fertility levels and soil carbon stocks favoring the improvement of the soil quality in the Savanna of Maranhão state.

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Effects of contrasting soil management regimes on total and labile soil organic carbon fractions in a loess soil in China

Cited by 226 publications

References 50 publications

Impacts of Fertilization Type on Soil Microbial Biomass and Nutrient Availability in Two Agroecological Zones of Ghana

Impacts of Fertilization Type on Soil Microbial Biomass and Nutrient Availability in Two Agroecological Zones of Ghana

Labile forms of carbon and soil aggregates

Qualidade química do solo e dinâmica de carbono sob monocultivo e consórcio de macaúba e pastagem

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