玉米 - Growth retardation
症状
Plant shows stunted growth. At severe deficiency necrotic zones develop at leaf margins and tips.
原因
Severe iron deficiency (left)
玉米 - Chlorosis
症状
Symptoms of iron deficiency start on younger leaves. Plants show chlorotic leaves with interveinal stripes. When the deficiency becomes severe the veins also become chlorotic and plant growth is stunted.
原因
Iron deficiency
Can be confused with manganese deficiency, but manganese deficiency is very rare in corn.
Magnesium deficient plants also show interveinal chlorosis, but the symptoms start on older leaves.
Iron deficiency vs. healthy plant使变得更糟
- High pH
- Water logged soils
- Calcareous soils
- High copper, manganese or zinc soils
铁很重要
- Healthy green foliage
- Improved yield and grain quality
