What it does

When plants experience drought, it has less ability to extract nutrients from the soil.

Why and where it occurs

Water stress is a problem in rainfed areas with poor rainfall distribution or within irrigated areas with poor water delivery. Permeable soils (i.e., high infiltration rates) and soils with low moisture retention increase the probability of water stress. Poorly leveled fields often result in patches of higher soil with water stress.

How to identify

Rice fields affected by drought or water stress have:

• Stunted plants
• Rolled leaves
• Delayed flowering
• Burned tip
• Naturally drying (senescence) of leaves
• Whitehead (but the tiller will still be attached to the stem)

Drought symptoms can be confused with N deficiency and high spots in the field. To confirm the cause of problem, check the field and/or ask farmer about weather conditions. Also check for high spots in field or soil cracking.

How to manage

• Reduce water stress.
  Ensure fields are well leveled, choose an appropriate cultivar (see note) and planting date that increases the probability of moisture being available during the critical flowering period.
• When possible, identify periods of probable moisture stress, and avoid these periods

Learn more

View full fact sheet:
Drought on IRRI Rice Knowledge Bank