Factors controlling accumulation and decomposition of organic carbon in humus horizons of Andosols

Miyazawa, Makoto; Takahashi, Tadashi; Sato, Takashi; Kanno, H.; Nanzyo, Masami

doi:10.1007/s00374-013-0792-8

Cited by 27 publications

(10 citation statements)

References 23 publications

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“…(Takahashi et al, 2012). (Takahashi et al, 2006a), as was later verified in a laboratory incubation (Miyazawa et al, 2013). These results are consistent with field studies that demonstrated a marked decrease in Al p and SOM contents of Ap horizons in Andosols following cultivation and liming (Saigusa et al, 1988;Verde et al, 2005).…”

Section: Organic Carbon Accumulation In Andosolssupporting

confidence: 86%

Nature, properties and function of aluminum–humus complexes in volcanic soils

2016

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Andosols (or Andisols) possess several distinctive properties that are rarely found in other groups of soils. These properties are largely due to the dominance of short-range-ordered minerals (allophane, imogolite and ferrihydrite) and/or metal-humus complexes (Al/Fe-humus complexes) in their colloidal fraction. While several papers have extensively reviewed the nature and properties of short-range-ordered minerals, there is no comprehensive review of the genesis, characteristics and management implications of Al-humus complexes, the dominant form of active Al in non-allophanic Andosols. In this review, we survey the chemical characteristics of Al-humus complexes and discuss the pedogenic environment favoring their formation in non-allophanic Andosols. The role of Al-humus complexes in carbon cycling and soil organic carbon accumulation is emphasized as an important mechanism controlling organic dynamics in Andosols. While non-allophanic Andosols share many common properties with allophanic Andosols, they display several distinct characteristics associated with Al-humus complexes, such as strong acidity and high exchangeable Al content that impair agricultural productivity due to Al phytotoxicity. Thus, we focus on the role of Al-humus complexes in regulating aqueous Al 3+ solubility and release/retention kinetics, Al phytotoxicity, phosphorus dynamics, and suppression of soil-borne diseases. Knowledge of these soil properties as related to Al-humus complexes is necessary to develop effective soil management practices to assure sustainable agricultural productivity in non-allophanic Andosols. Finally, future research needs are identified concerning the role of Al-humus complexes in regulating soil biogeochemical processes.

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Section: Organic Carbon Accumulation In Andosolssupporting

confidence: 86%

Nature, properties and function of aluminum–humus complexes in volcanic soils

2016

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“…A Repeated Measures Analysis also showed that the main effect of the aglime on CO 2 emission rates was also short-lived, lasting for less than six days (data not shown). Other researchers, who utilized 13 C tracer technology, such as Dumale et al [6] and Miyazawa et al [40], also reported that aglime CO 2 emissions were short-lived, which suggests that the aglime solubility is greatly enhanced in acid soils. Nevertheless, cumulative emissions from the limed soils in this study were 270 mg CO 2 -C kg −1 ODS h −1 greater than in the non-limed soils.…”

Section: Organic Residue-aglime Effectsmentioning

confidence: 98%

Organic Residues and Ammonium Effects on CO2 Emissions and Soil Quality Indicators in Limed Acid Tropical Soils

2019

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Aglime (agricultural lime), commonly applied to acid soils to increase the soil pH and productivity, may lead to the release of CO2 into the atmosphere or to carbon (C) sequestration, although the processes involved are not fully understood. As large acreages of arable land are limed annually, exploring soil management practices that reduce aglime-induced CO2 emissions from acid soils while maintaining or improving the soil quality is paramount to mitigating the effects of global climate change. This study, therefore, assessed the effects of organic residues and ammonium on CO2 emissions and soil quality indicators in two limed soils. Two contrasting acid soils (Nariva series, Mollic Fluvaquents and Piarco series, Typic Kanhaplaquults) were amended with varying combinations of aglime (0% and 0.2% w/w CaCO3), organic residue (0% and 5% w/w biochar or poultry litter), and NH4-N (0% and 0.02% w/w) and were incubated in 300 mL glass jars for 31 days. The sampling for CO2 was performed on 11 occasions over the course of the incubation, while soil sampling was conducted at the end. The results indicate that aglime application significantly (p < 0.05) increased the cumulative CO2 emissions in all cases except with the addition of poultry litter. Alternatively, ammonium did not regulate the effect of aglime on CO2 emissions, which was l because of the low rate at which it was applied in comparison to aglime. The results also showed that poultry litter significantly (p < 0.05) increased the soil electrical conductivity (EC), available nitrogen (N), and pH, especially in the Piarco soil, while the hardwood biochar had little to no effect on the soil properties. Our findings indicate the potential for utilizing poultry litter to reduce the impact of aglime on CO2 emissions while improving the soil quality. Further studies utilizing 13C to trace aglime CO2 emissions are, however, required to identify the mechanism(s) that contributed to this reduction in the emissions.

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“…The microorganisms might have adapted to temperatures lower than 30 • C, and their activity in this temperature range might have been enhanced by phosphate addition. Several studies have reported that soil C and N mineralization is limited by the phosphate availability in highly weathered tropical soils with high phosphate-fixing capacity [20,21] and in cool, temperate soils rich in organic content, such as Andosols [9,[22][23][24]. These studies did not refer to temperature dependency of the mineralization.…”

Section: Discussionmentioning

confidence: 99%

“…The present study indicates that the effect of intensive fertilizer management on organic matter decomposition should be investigated more systematically and extensively, as well as being reflected in sustainable soil management. Several studies have reported that soil C and N mineralization is limited by the phosphate availability in highly weathered tropical soils with high phosphate-fixing capacity [20,21] and in cool, temperate soils rich in organic content, such as Andosols [9,[22][23][24]. These studies did not refer to temperature dependency of the mineralization.…”

Section: Discussionmentioning

confidence: 99%

“…The effects of liming and heavy application of phosphate on soil C and N mineralization in allophanic Andosols were investigated under different temperature regimes. Liming led highly humified organic matter to more decomposable [16,17,24] and increased the easily degradable fraction of organic matter, and as a result, the microbial communities that proliferated using these fractions became more active with the application of high amounts of phosphate. In contrast, in the non-liming treatment, phosphate increased soil N mineralization at lower temperatures.…”

Section: Discussionmentioning

confidence: 99%

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Liming and Phosphate Application Influence Soil Carbon and Nitrogen Mineralization Differently in Response to Temperature Regimes in Allophanic Andosols

et al. 2022

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Andosols are characterized by high organic matter content and play a significant role in carbon storage. However, they have low phosphorus fertility because of the high phosphate-fixing capacity of active aluminum. For agricultural use of Andosols, it is necessary to ameliorate its poor phosphorus fertility by applying lime and high doses of phosphate fertilizers. The objective of the present study was to clarify how such soil amendments affect the mineralization of soil organic carbon (C) and nitrogen (N) in allophanic Andosols under different temperature regimes. The soil was treated using combinations of liming and heavy phosphate application, followed by incubation under different temperature conditions. The N mineralization and the soil CO2 evolution rate were measured periodically. The patterns of N mineralization were analyzed by fitting them to first-order kinetics. Liming increased C and N mineralization irrespective of temperature, and the increase was further enhanced by phosphate application. Kinetic analysis of the N mineralization curve indicated lowering of the activation energy of N mineralization reactions with phosphate application, suggesting that P application may accelerate N mineralization at lower temperatures. These findings provide a basis for developing soil management strategies to reduce the loss of soil organic matter.

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Factors controlling accumulation and decomposition of organic carbon in humus horizons of Andosols

Cited by 27 publications

References 23 publications

Nature, properties and function of aluminum–humus complexes in volcanic soils

Nature, properties and function of aluminum–humus complexes in volcanic soils

Organic Residues and Ammonium Effects on CO2 Emissions and Soil Quality Indicators in Limed Acid Tropical Soils

Liming and Phosphate Application Influence Soil Carbon and Nitrogen Mineralization Differently in Response to Temperature Regimes in Allophanic Andosols

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