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- W2090396952 abstract "Organic matter amendments have been proposed as a means to enhance soil carbon (C) stocks on degraded soils. However, only few data exist on rates of soil C sequestration or the fate of added C in grassland soils, which are generally thought to have high C storage potential. We measured changes in the amount of C and nitrogen (N) in soils and in the composition of soil organic matter (SOM) following a single application of composted organic matter in two annual grasslands from different bioclimatic zones (coastal and inland valley). There was a significant increase in bulk soil organic C content at the valley grassland, and a similar but non-significant trend at the coastal grassland. Physical fractionation of soil three years after organic matter amendment revealed increases in C and N in the free- and occluded light fractions in both the valley and coastal grasslands. Amendments resulted in a greater relative increase in the N stored in light soil fractions compared to C, leading to lower C:N ratios. Diffuse Reflectance Infrared Fourier Transform (DRIFT) spectroscopy showed an increase in the ratio of carboxyl and carbonyl functional groups to aliphatic methyl and methylene groups in the free- and occluded light fractions. These data show that the organic matter amendment was incorporated in the free light and occluded light fractions over three years. Our results indicate that a single application of compost to grassland soils can increase soil C and N storage in labile and physically protected pools over relatively short time periods and contribute to climate change mitigation." @default.
- W2090396952 created "2016-06-24" @default.
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- W2090396952 creator A5081018868 @default.
- W2090396952 date "2014-01-01" @default.
- W2090396952 modified "2023-10-10" @default.
- W2090396952 title "Impacts of organic matter amendments on carbon and nitrogen dynamics in grassland soils" @default.
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- W2090396952 doi "https://doi.org/10.1016/j.soilbio.2013.09.011" @default.
- W2090396952 hasPublicationYear "2014" @default.
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