Journal article
Sodium (Na) stimulates barley growth in potassium (K)-deficient soils by improved K uptake at low Na supply or by substitution of K at moderate Na supply
Journal of Soil Science and Plant Nutrition, Vol.21, pp.1520-1530
2021
Abstract
Sodium (Na) can alleviate potassium (K) limitations by either increasing K uptake or by substitution of K functions in plants, but there is limited information about the levels of soil Na and K at which these separate Na effects operate in cereals. Barley was grown in two sandy soils to assess plant growth and nutrient uptake responses with varying soil Na (5–95 mg kg−1) and K (30, 90 mg kg−1) treatments. Compared with very low Na (5 mg kg−1), low Na (35, 65 mg kg−1) enhanced barley tillering in low K soil (30 mg kg−1) up to 6 weeks after sowing (WAS). Low K with 95 mg Na kg−1 or adequate K (90 mg kg−1) with 65 mg Na kg−1 also produced more tillers at 6–7 WAS. Shoot dry weight of low K plants was significantly improved by low Na at 7 and 9 WAS and even by 95 mg Na kg−1 at 9 WAS. While low Na increased shoot K concentration and the K/Na ratio in low K plants, 95 mg Na kg−1 mainly increased shoot Na concentration at 7 and 9 WAS. By comparison, soil Na had less effect on shoot K concentration and dry weight of adequate K plants. Barley growth at low soil K was stimulated by increasing K uptake at low Na (35–65 mg Na kg−1), but mainly by Na substitution of K at 95 mg Na kg−1, i.e. the beneficial effect of Na on response of low K plants was attributed to two distinct mechanisms that operated at different soil Na levels.
Details
- Title
- Sodium (Na) stimulates barley growth in potassium (K)-deficient soils by improved K uptake at low Na supply or by substitution of K at moderate Na supply
- Authors/Creators
- M. Hussain (Author/Creator) - Murdoch UniversityQ. Ma (Author/Creator) - Murdoch UniversityR. Bell (Author/Creator) - Murdoch University
- Publication Details
- Journal of Soil Science and Plant Nutrition, Vol.21, pp.1520-1530
- Publisher
- Springer
- Identifiers
- 991005543797107891
- Copyright
- © Sociedad Chilena de la Ciencia del Suelo 2021
- Murdoch Affiliation
- School of Agricultural Sciences
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.4 Crop Science
- 3.4.49 Plant Stress Responses
- Web Of Science research areas
- Environmental Sciences
- Plant Sciences
- Soil Science
- ESI research areas
- Agricultural Sciences