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dc.contributor.authorYu, Xing
dc.contributor.authorKeitel, Claudia
dc.contributor.authorDijkstra, Feike A.
dc.date.accessioned2024-02-25T22:21:08Z
dc.date.available2024-02-25T22:21:08Z
dc.date.issued2023en_AU
dc.identifier.urihttps://hdl.handle.net/2123/32254
dc.description.abstractCalcium carbonate (CaCO3) is frequently used to ameliorate soil acidity in agricultural soils. An alternative is calcium hydroxide (Ca(OH)2), which is more soluble than CaCO3. However, the associated change in soil parameters remains unclear. We aimed to evaluate the different responses of available nitrogen (N) and phosphorus (P), microbial biomass carbon (C), N, and P (MBC, MBN, and MBP), and dissolved organic C and N (DOC and DON) to CaCO3 and Ca(OH)2. We amended an acidic soil (pH of 5.6) with CaCO3 or Ca(OH)2 at 5 different loadings of hydroxide (OH−, 0.025, 0.05, 0.1, 0.25, and 0.75 mmol g−1) in a 30-day incubation experiment. Both Ca(OH)2 and CaCO3 rapidly increased soil pH, but soil pH increased to 10 with the highest loading rate of Ca(OH)2, while soil pH levelled off at 7.5 with an OH− loading of 0.25 mmol g−1 as CaCO3. Higher ammonium and lower nitrate concentration with high OH− loading of Ca(OH)2 (>0.25 mmol g−1) suggests that nitrification was constrained under basic soil conditions, while adding CaCO3 showed the opposite results. Ca(OH)2 addition increased DOC and DON, along with MBC and MBN, suggesting that desorption of organic matter stimulated microbial growth. High OH− loading with CaCO3 reduced available P due to high P-fixation more than Ca(OH)2. Our study shows that while both Ca(OH)2 and CaCO3 can be used to ameliorate soil acidity, Ca(OH)2 may be able to reduce nitrification and thus N loss at high OH− loading and enhance available P more than CaCO3.en_AU
dc.language.isoenen_AU
dc.publisherSpringeren_AU
dc.relation.ispartofJournal of Soil Science and Plant Nutritionen_AU
dc.rightsCopyright All Rights Reserveden_AU
dc.subjectCalcium carbonateen_AU
dc.subjectCalcium hydroxideen_AU
dc.subjectLimingen_AU
dc.subjectNitrificationen_AU
dc.subjectOrganic matter desorptionen_AU
dc.subjectP-fixationen_AU
dc.titleAmeliorating soil acidity with calcium carbonate and calcium hydroxide: effects on carbon, nitrogen, and phosphorus dynamicsen_AU
dc.typeArticleen_AU
dc.subject.asrc410604en_AU
dc.identifier.doi10.1007/s42729-023-01400-6
dc.type.pubtypeAuthor accepted manuscripten_AU
dc.relation.arcDP190102262
usyd.facultySeS faculties schools::Faculty of Science::School of Life and Environmental Sciencesen_AU
usyd.citation.volume23en_AU
usyd.citation.spage5270en_AU
usyd.citation.epage5278en_AU
workflow.metadata.onlyNoen_AU


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