Labile Organic Matter Fractions as Central Components of the Quality of Agricultural Soils: An Overview

Haynes, R. J.

doi:10.1016/s0065-2113(04)85005-3

Cited by 822 publications

(520 citation statements)

References 147 publications

Supporting

Mentioning

433

Contrasting

Unclassified

Order By: Relevance

“…Inorganic fertilizer addition may reduce N limitation for crop and weaken plant-microbial competition for N, therefore improving crop growths and affecting microorganisms by direct mineral nutrients input and indirect crop effects under BC-NPK treatment. This agrees with previous studies that showed that higher plant biomass usually induced higher SOM fractions contents (e.g., particulate organic matter, rhizodeposition), which could act as major sources and energy for microorganism (Haynes, 2005;Tian et al, 2013). Higher abundances of microbial groups under BC-NPK conditions coincide with higher aboveground biomass in our field study.…”

Section: Effects Of Biochar and Fertilizer Addition On Microbial Commsupporting

confidence: 92%

“…1) may be attributed to both the indirect BC effect and the synergistic effects of BC and fertilization. Because the C originating from litter and humus constitutes a significant proportion of DOM (Kalbitz et al, 2000; Haynes, 2005), the increase in the DOC and DON may be partly attributed to the higher plant biomass or the larger roots biomass and exudation after BC and fertilizer amendment. Indeed, the aboveground biomass was significantly higher after BC-NPK amendment than after the other three treatments (7996 kg ha − 1 vs. 5543, 5490, and 5623 kg ha −1 ).…”

Section: Effects Of Biochar and Fertilizer Addition On Organic Mattermentioning

confidence: 99%

“…Therefore, studying individual SOM fractions separated by physical and chemical methods is a more informative practice, especially for the study of nutrient cycling (von Lützow et al, 2007). SOM fractions have been suggested as more sensitive indicators of the effects of management practices and soil disturbance than the total SOM (Haynes, 2005). The addition of BC to soil can differentially affect individual SOM fractions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biochar affects soil organic matter cycling and microbial functions but does not alter microbial community structure in a paddy soil

Tian

Wang

Dippold

et al. 2016

Science of The Total Environment

227

View full text Add to dashboard Cite

Section: Effects Of Biochar and Fertilizer Addition On Microbial Commsupporting

confidence: 92%

Section: Effects Of Biochar and Fertilizer Addition On Organic Mattermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biochar affects soil organic matter cycling and microbial functions but does not alter microbial community structure in a paddy soil

Tian

Wang

Dippold

et al. 2016

Science of The Total Environment

227

View full text Add to dashboard Cite

“…This differentiation is particularly relevant for the C cycle, since for example the C fraction with the highest potential mobilization and transport capacity (i.e. POC due to its low density) is also a very labile fraction (Haynes, 2005). Thus, carbon erosion models should always consider the differential behaviour of sediment particles and SOC fractions when simulating erosion and transport processes.…”

Section: Introductionmentioning

confidence: 99%

Modelling a century of soil redistribution processes and carbon delivery from small watersheds using a multi-class sediment transport model

2017

View full text Add to dashboard Cite

Abstract.Over the last few decades, soil erosion and carbon redistribution modelling has received a lot of attention due to large uncertainties and conflicting results. For a physically based representation of event dynamics, coupled soil and carbon erosion models have been developed. However, there is a lack of research utilizing models which physically represent preferential erosion and transport of different carbon fractions (i.e. mineral bound carbon, carbon encapsulated by aggregates and particulate organic carbon). Furthermore, most of the models that have a high temporal resolution are applied to relatively short time series (< 10 yr −1 ), which might not cover the episodic nature of soil erosion. We applied the event-based multi-class sediment transport (MCST) model to a 100-year time series of rainfall observation. The study area was a small agricultural catchment (3 ha) located in the Belgium loess belt about 15 km southwest of Leuven, with a rolling topography of slopes up to 14 %. Our modelling analysis indicates (i) that interrill erosion is a selective process which entrains primary particles, while (ii) rill erosion is non-selective and entrains aggregates, (iii) that particulate organic matter is predominantly encapsulated in aggregates, and (iv) that the export enrichment in carbon is highest during events dominated by interrill erosion and decreases with event size.

show abstract

“…Its content is proportional to the quantity of microbial biomass in soil (Lovell and Jarvis 1998) and therefore it is an important factor of potential soil fertility. Many authors consider the higher content of the labile fraction of the soil carbon (SOC) as a feature of soil quality (Ghani et al 2003, Haynes 2005, Maia et al 2007). Unfortunately, it cannot be stated that it is a steady feature of quality.…”

mentioning

confidence: 99%

Relationships between quality and quantity of soil labile fraction of the soil carbon in Cambisols after liming during a 5-year period

Kolář¹,

Vaněk²,

Kužel³

et al. 2011

PLANT SOIL ENVIRON

View full text Add to dashboard Cite

The labile fraction of soil organic carbon (SOC) in terms of its quantity is a sensitive but dynamic indicator of the reactive agent in soils. If it is to be considered as a feature of soil quality, the value of its quantity should be completed by data on its quality. It can be expressed by the value of the rate constant of microbial oxidation k bio of this fraction or by data on chemical stability during hydrolysis or oxidation. If the quality of SOC labile fraction is not determined, at least the ratio of C MIC : C org should be given. The adjustment of soil acidity increases the microbial activity of soils, therefore the quantity of SOC labile fraction decreases and at the same time k bio decreases proportionately to the increasing stability of soil organic matters. During a 5-year period after the liming the soils acidify again and this process passes the faster the lesser their ion exchange capacity and buffering are. The quantity of the labile fraction of SOC raises again, its stability decreases and k bio raises again. The conversion pH value has secondary relevance.

show abstract

Labile Organic Matter Fractions as Central Components of the Quality of Agricultural Soils: An Overview

Cited by 822 publications

References 147 publications

Biochar affects soil organic matter cycling and microbial functions but does not alter microbial community structure in a paddy soil

Biochar affects soil organic matter cycling and microbial functions but does not alter microbial community structure in a paddy soil

Modelling a century of soil redistribution processes and carbon delivery from small watersheds using a multi-class sediment transport model

Relationships between quality and quantity of soil labile fraction of the soil carbon in Cambisols after liming during a 5-year period

Contact Info

Product

Resources

About