Rice seedlings stall: acid, cold, toxins, burn — separate them
A stalled rice seedling is not always ‘needs more urea’.
- After green-up the rice sits.
- Cold, ferrous toxicity, acid, low P, seed-furrow burn — split them.
- Water temperature, rusty water, root colour first.
- Nitrogen shortage still has white roots; toxicity and chill have poor roots.
- Disease has spreading lesions; stalled seedlings are often the whole field or the low spots.
- Don’t greet every stall with urea; don’t double compound on black roots.
- Dry the field / drain: Follow the growth stage and the station. Give the roots air first
- Name what you see before you feed.
- If leaves, roots and the surface disagree, stop.
What you see in the field
After green-up the rice sits. Cold, ferrous toxicity, acid, low P, seed-furrow burn — split them. Water temperature, rusty water, root colour first.First the leaf position: new or old, even yellow or between the veins. If that does not match, do not fertilise yet. Pull one plant and read whether the roots are white, brown or foul.
Tap to enlarge. The caption says what to photograph. Missing field photos are marked as to-be-added.
Why it looks like this
The field looks like this because the root cannot take water or nutrients the usual way. Fix the soil condition first — drainage, salt, acidity, compaction or a salt of fertiliser — then a thin feed. Rates live in the range on this page; confirm with a local station and the label.
Easy to mix up
Looks like “Nitrogen shortage”
Nitrogen shortage still has white roots; toxicity and chill have poor roots.
Looks like “Disease”
Disease has spreading lesions; stalled seedlings are often the whole field or the low spots.
Do this / don’t do that
- 1Compare the worst plants with a neighbour ridge. Photograph whole plant, close-up and soil surface before you add fertiliser.
- 2Match roots, leaves and the soil surface to this guide. If they do not line up, do not copy a bag count.
- 3Use the rate range on this page only as a range. Confirm with a local station and the product label.
Don’t do this first
- Don’t greet every stall with urea; don’t double compound on black roots.
Rate range
Dry the field / drain
Follow the growth stage and the station
Give the roots air first.
Phosphate fertiliser
Cold stall: band it from a soil test
Not every stalled seedling is short of phosphorus.
These are ranges. Confirm with your local extension station and the product label.
When you see After green-up the rice sits. Cold, test. Take soil from the bad patch and from a greener neighbour, separately.
Lesson video
2026-03-19 · Li Zeyu · For learning. Serious damage: local agronomist or a soil test.
For learning only. Fertiliser and pesticide decisions need a local agronomist and a soil test.
Not sure? Photograph the field to identify the problem