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CC BY-NC-ND V4.0, Open Access
Journal article
Long-term rundown of plant-available potassium in Western Australia requires a re-evaluation of potassium management for grain production: A review
Crop and Pasture Science, Vol.73(9), pp.981-996
2022
Appears in Open Access via Read & Publish Agreements
Abstract
Abstract
Negative potassium (K) balances on farmlands globally are widespread because fertiliser K input is often less than losses (leaching) and removal of K in hay, straw and grain, which leads to a rundown of plant-available K. When soil K reserves are not large and the plant-available K pools are not well buffered, the risk of K rundown in soils is high. In the south-west of Western Australia, soil K rundown, particularly by continuous cropping or in systems where a large portion of crop biomass is removed, is increasing the prevalence of crop K deficiency even on soils where K was not previously a limiting factor for crop yields. While fertiliser K is required for adequate supply of plant-available K, maximising K use efficiency is also important for cropping profitability and sustainability in dryland agriculture. Plant K uptake and use efficiency can be affected by soil types, crop species and sequences, seasonal conditions, and K management. In water-limited environments, crop K nutrition, especially root access to subsoil K, plays a crucial role in promoting root growth, regulating plant water relations and alleviating biotic and abiotic stresses. Optimised use of both soil and fertiliser K is increasingly necessary to sustain crop yields under stressed conditions in the context of K rundown in soils.
Details
- Title
- Long-term rundown of plant-available potassium in Western Australia requires a re-evaluation of potassium management for grain production: A review
- Authors/Creators
- Q. Ma (Author/Creator)R. Bell (Author/Creator)C. Scanlan (Author/Creator)A. Neuhaus (Author/Creator)
- Publication Details
- Crop and Pasture Science, Vol.73(9), pp.981-996
- Publisher
- CSIRO Publishing
- Identifiers
- 991005541013007891
- Copyright
- © 2022 The Authors.
- Murdoch Affiliation
- SoilsWest; Centre for Sustainable Farming Systems
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.45 Soil Science
- 3.45.473 Soil Phosphorus Dynamics
- Web Of Science research areas
- Agriculture, Multidisciplinary
- ESI research areas
- Agricultural Sciences