Effects of soil amendments on fractions and stability of soil organic matter in saline-alkaline paddy.

Journal of Environmental Management
Lipeng WuXiujun Wang

Abstract

Soil amelioration is an effective practice to alleviate the adverse effects of soil salinization. However, increasing the fertility of salt-affected soils has been challenging, particularly in coastal saline-alkaline paddy soils. Here, we carried out a 45-day incubation experiment to evaluate the impacts of soil amendments on fractions and stability of soil organic matter (SOM) in a saline-alkaline paddy. The experiment simulates the flooding-draining practice and consists of CaCO3, gypsum and biochar amendments using different fertility soils. We measured dissolved organic carbon (DOC) and nitrogen (DON) in supernatant liquids, water-soluble cations, water extractable organic carbon (WEOC) and nitrogen (WEON), and microbial biomass carbon (MBC) and nitrogen (MBN) in soils after the incubation. Results showed that water soluble sodium (Na+) was significantly decreased under all amendments (by 17%-32%), except in high fertility soil. We found a significant decrease in DOC (by 36%-47%) under gypsum treatment, but in DON (by 18%-59%) under biochar treatment. However, there was no significant effect on DOC or DON under CaCO3 treatment. Gypsum treatment led to decreased WEOC content (by 0.067%-5.4%), but increased MBC (by 0.16%-44%)...Continue Reading

References

Jul 4, 2012·Journal of Environmental Quality·Kurt A SpokasKristine A Nichols
Sep 11, 2012·The Science of the Total Environment·Raj SetiaJo Smith
Dec 3, 2014·Journal of Environmental Management·Angela Joy EykelboshEduardo Guimarães Couto
Jan 1, 2018·The Science of the Total Environment· SaifullahRavi Naidu
Sep 1, 2019·The Science of the Total Environment·H Kate SchofieldMark F Fitzsimons

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Citations

Aug 17, 2021·Frontiers in Plant Science·Akinlolu Olalekan AkanmuBernard R Glick

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