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Lime application reduces potassium and nitrate leaching on sandy soils (Die Kalkanwendung reduziert das Auswaschen von Kalium und Nitrat auf sandigen Böden)

Motesharezadeh, B., Bell, R.W.ORCID: 0000-0002-7756-3755 and Ma, Q. (2021) Lime application reduces potassium and nitrate leaching on sandy soils (Die Kalkanwendung reduziert das Auswaschen von Kalium und Nitrat auf sandigen Böden). Journal für Kulturpflanzen, 73 (3-4). pp. 83-93.

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Abstract

Potassium (K) leaching is common in light-textured soils and reduces soil available K to plants. This study examined the effect of lime application and K rates (nil, 20, 60 kg K/ha) on K leaching and other leachate parameters of four sandy soils in Western Australia. Three out of four soils did not differ in K leaching between the rates of nil and 20 kg K/ha, whereas 60 kg K/ha increased K leaching in all four soils. For the Merredin soils, lime applica­tion markedly delayed K leaching at 60 kg K/ha, showing K leaching peak at 4.75 pore volume (PV) in the limed soil (pHCaCl2: 6.20) but at 3 PV in the non-limed soil (pHCaCl2: 4.50), and liming also reduced total amount of leached K and NO3. Similarly, the peak of K leaching occurred at 2–3 PV in the other two non-limed soils. Maximum leachate NO3 concentrations at 60 kg K/ha were 46 mg/L at 2 PV with lime versus 110 mg/L at 1.25 PV without lime, while the amount of leached NO3 from nil K soils was greater than from the K treated soils. The results suggest that liming of an acid sand can slow down and reduce K and NO3 leaching and have significant implication for K-fertilizer management on such soils.

Item Type: Journal Article
Murdoch Affiliation(s): College of Science, Health, Engineering and Education
Land Management Group
Publisher: Julius Kühn-Institut (JKI)
Copyright: © 2021 The Authors.
URI: http://researchrepository.murdoch.edu.au/id/eprint/60407
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