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Effect on crops - Rice
Magnesium and sulphur
| Required for: |
Yield, starch content and quality (Improvement of nutritional value)
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| High deficiency risk: |
Mg: |
Acid soils, low-CEC soils, coarse-texured sandy soils with high percolation rates and leaching losses, leached, old acid sulphate soils with low base saturation
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S: |
Soils containing allophane, low organic matter status, sandy soils, highly weathered soils containing large amounts of Fe oxides
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| Deficiency symptoms: |
Mg: |
Yellow stripes on flag leaf, poor panicle development, unfilled spikelets
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S: |
Pale green plants, light green col-oured young leaves, stunted growth, delayed maturity, reduced N° of spikelets per panicle
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| Recommendations: |
For yields > 6 t/ha, 80 – 100 kg Kieserite/ha are recommended. On Mg poor soils, 1.5-2.0 times that amount is required. |
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Mg deficiency in rice expressed by yellow stripes on the flag leaf and poor panicle development.
S deficiency in rice often affects the young leaves. Plant growth is retarded.
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