Long-Term Effects of Inorganic and Organic Amendments on Organic Carbon in a Paddy Soil of the Taihu Lake Region, China

Combining organic farming and biogas production from agricultural feedstocks has been suggested as a way of achieving carbon (C) neutrality in Europe. However, as the long-term effects of C removal for methane production on soil organic carbon (SOC) are unclear, organic farmers in particular have questioned whether farm biogas production will have a positive effect on soil fertility. Eight years of data from an organic long-term field trial involving digestate fertilisation and various crop rotations (CRs) with differing proportions of clover-grass leys were used to calculate C inputs based on the CANDY model, and these modelled changes compared with measured changes in SOC content (SOCc) over the same period. Measured SOCc increased by nearly 20% over the eight years. Digestate fertilisation significantly increased SOCc. Fertilised plots with the highest proportion of clover-grass in the CR had the highest SOCc. The C inputs from clover-grass leys, even if they only made up 25% of the CR, were high enough to increase SOCc, even with the removal of all aboveground biomass and without fertilisation. Our results show that biogas production based on clover-grass leys could be an important part of sustainable farming, improving or maintaining SOCc and improving nutrient flows, particularly in organic farming, while simultaneously providing renewable energy.

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Long-Term Effects of Organic Amendments on Soil Fertility

Sustainable Agriculture Volume 2 ◽

10.1007/978-94-007-0394-0_34 ◽

2011 ◽

pp. 761-786 ◽

Cited By ~ 27

Author(s):

Mariangela Diacono ◽

Francesco Montemurro

Keyword(s):

Soil Fertility ◽

Organic Amendments ◽

Long Term Effects

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Erratum: The Effects of Long-Term Application of Organic Amendments on Soil Organic Carbon Accumulation

Soil Science Society of America Journal ◽

10.2136/sssaj2012.0306er2 ◽

2015 ◽

Vol 79 (3) ◽

pp. 973-973

Author(s):

Jinling Li ◽

Gregory K. Evanylo

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Organic Amendments ◽

Carbon Accumulation

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Dissolved Inorganic and Organic Carbon in an Ephemeral Fresh Water Stream in Southern Arizona

Radiocarbon ◽

10.1017/rdc.2019.46 ◽

2019 ◽

Vol 61 (5) ◽

pp. 1531-1539

Author(s):

A J Timothy Jull ◽

George S Burr ◽

Alexander G Leonard ◽

Jamie Fitzgerald ◽

Li Cheng ◽

...

Keyword(s):

Organic Carbon ◽

Term Study ◽

Water Stream ◽

Long Term Study ◽

Preliminary Information ◽

Stream System ◽

Pima County ◽

End Members ◽

Inorganic And Organic

ABSTRACTWe report on an initial long-term study of dissolved inorganic and organic carbon (DIC) from Sabino Creek, located in Sabino Canyon, Pima County, Arizona. The purpose of this study was to monitor changes in dissolved radiocarbon (14C) with time and to understand the processes contributing to these variations. Our results span the period 2009–2016 and show a mixing trend between dissolved inorganic and organic carbon modern end-members with an older component. This study provides preliminary information for more detailed research on recycling of organic components in this stream system.

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