Impacts of Phosphogypsum, Soluble Fertilizer and Lime Amendment of Acid Soils on the Bioavailability of Phosphorus and Sulphur under Lucerne (Medicago sativa)

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Output type: Journal article

UM6P affiliated Publication?: Yes

Author list: Bouray, Moussa; Moir, Jim; Condron, Leo; Lehto, Niklas

Publisher: MDPI

Publication year: 2020

Journal: Plants (2223-7747)

Journal acronym: Plants

Volume number: 9

Issue number: 7

ISSN: 2223-7747

eISSN: 2223-7747

Languages: English (EN-GB)

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Legumes play critical dual roles in grazed grassland ecosystems; providing nitrogen inputs and high-quality feed for grazing livestock. However, many species fail to persist in acidic, low fertility soils. A glasshouse study was conducted to investigate the response of lucerne (Medicago sativa) to phosphogypsum (PG), lime and soluble P + S fertilizer (PS) application to two soils. Phosphorus and sulphur were applied through either PG (0, 1, 3 and 9 t ha(-1)) or P + S fertilizer at equivalent rates to PG. Both PG and PS were applied with or without lime, which was applied at 2 t ha(-1). Yield and nutrient uptake of the lucerne was measured, while the soil was analyzed for pH, Olsen P and exchangeable aluminum. Yield responses were significantly different between the two soils. Maximum yields and P and S uptakes were obtained under PG 9 t ha(-1) combined with lime. Exchangeable Al decreased in both soils under 1 ha(-1) of PG compared with the control. At the highest rate, Olsen P increased by 8 and 6 mg kg(-1) for PG and by 6 and 11 mg kg(-1) for PS compared with the control for Glenmore and Molesworth soils respectively. Phosphogypsum showed positive effects on P and S bioavailability.


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Last updated on 2022-16-01 at 23:18