Symptoms
Dark brown to reddish spots appear on the slightly chlorotic young leaf. Older leaves show a bronze tint starting from the leaf margins while the midrib remains green for a longer time. With ongoing deficiency the complete leaf blade turns bronze to brown.
Stunted, uneven growth. Under severe Zn deficiency, tillering decreases or may even stop.
Reasons
Zinc Deficiency (Hudda disease - Pakistan, Khaira disease - India).
Rice is sensitive to Zn deficiency; it is the most widespread micronutrient disorder in rice.
Zinc availibility decreases after flooding. Zn deficiency can be caused by many factors, e.g.:
- High pH (formation of Zn(OH)2)
- Precipitation of ZnS in anaerobic conditions.
- High HCO3- concentration
- Formation of Zn-phosphates following large applications of P fertilizer.
- Excessive liming.
Symptoms
Dark brown to reddish spots appear on the slightly chlorotic young leaf. Older leaves show a bronze tint starting from the leaf margins while the midrib remains green for a longer time. With ongoing deficiency the complete leaf blade turns bronze to brown.
Stunted, uneven growth. Under severe Zn deficiency, tillering decreases or may even stop.
Reasons
Zinc Deficiency (Hudda disease - Pakistan, Khaira disease - India).
Rice is sensitive to Zn deficiency; it is the most widespread micronutrient disorder in rice.
Zinc availibility decreases after flooding. Zn deficiency can be caused by many factors, e.g.:
- High pH (formation of Zn(OH)2)
- Precipitation of ZnS in anaerobic conditions.
- High HCO3- concentration
- Formation of Zn-phosphates following large applications of P fertilizer.
- Excessive liming.
Symptoms
Dark brown to reddish spots appear on the slightly chlorotic young leaf. Older leaves show a bronze tint starting from the leaf margins while the midrib remains green for a longer time. With ongoing deficiency the complete leaf blade turns bronze to brown.
Stunted, uneven growth. Under severe Zn deficiency, tillering decreases or may even stop.
Reasons
Zinc Deficiency (Hudda disease - Pakistan, Khaira disease - India).
Rice is sensitive to Zn deficiency; it is the most widespread micronutrient disorder in rice.
Zinc availibility decreases after flooding. Zn deficiency can be caused by many factors, e.g.:
- High pH (formation of Zn(OH)2)
- Precipitation of ZnS in anaerobic conditions.
- High HCO3- concentration
- Formation of Zn-phosphates following large applications of P fertilizer.
- Excessive liming.
Symptoms
Dark brown to reddish spots appear on the slightly chlorotic young leaf. Older leaves show a bronze tint starting from the leaf margins while the midrib remains green for a longer time. With ongoing deficiency the complete leaf blade turns bronze to brown.
Stunted, uneven growth. Under severe Zn deficiency, tillering decreases or may even stop.
Reasons
Zinc Deficiency (Hudda disease - Pakistan, Khaira disease - India).
Rice is sensitive to Zn deficiency; it is the most widespread micronutrient disorder in rice.
Zinc availibility decreases after flooding. Zn deficiency can be caused by many factors, e.g.:
- High pH (formation of Zn(OH)2)
- Precipitation of ZnS in anaerobic conditions.
- High HCO3- concentration
- Formation of Zn-phosphates following large applications of P fertilizer.
- Excessive liming.
Symptoms
Dark brown to reddish spots appear on the slightly chlorotic young leaf. Older leaves show a bronze tint starting from the leaf margins while the midrib remains green for a longer time. With ongoing deficiency the complete leaf blade turns bronze to brown.
Stunted, uneven growth. Under severe Zn deficiency, tillering decreases or may even stop.
Reasons
Zinc Deficiency (Hudda disease - Pakistan, Khaira disease - India).
Rice is sensitive to Zn deficiency; it is the most widespread micronutrient disorder in rice.
Zinc availibility decreases after flooding. Zn deficiency can be caused by many factors, e.g.:
- High pH (formation of Zn(OH)2)
- Precipitation of ZnS in anaerobic conditions.
- High HCO3- concentration
- Formation of Zn-phosphates following large applications of P fertilizer.
- Excessive liming.
Symptoms
Dark brown to reddish spots appear on the slightly chlorotic young leaf. Older leaves show a bronze tint starting from the leaf margins while the midrib remains green for a longer time. With ongoing deficiency the complete leaf blade turns bronze to brown.
Stunted, uneven growth. Under severe Zn deficiency, tillering decreases or may even stop.
Reasons
Zinc Deficiency (Hudda disease - Pakistan, Khaira disease - India).
Rice is sensitive to Zn deficiency; it is the most widespread micronutrient disorder in rice.
Zinc availibility decreases after flooding. Zn deficiency can be caused by many factors, e.g.:
- High pH (formation of Zn(OH)2)
- Precipitation of ZnS in anaerobic conditions.
- High HCO3- concentration
- Formation of Zn-phosphates following large applications of P fertilizer.
- Excessive liming.
Symptoms
Dark brown to reddish spots appear on the slightly chlorotic young leaf. Older leaves show a bronze tint starting from the leaf margins while the midrib remains green for a longer time. With ongoing deficiency the complete leaf blade turns bronze to brown.
Stunted, uneven growth. Under severe Zn deficiency, tillering decreases or may even stop.
Reasons
Zinc Deficiency (Hudda disease - Pakistan, Khaira disease - India).
Rice is sensitive to Zn deficiency; it is the most widespread micronutrient disorder in rice.
Zinc availibility decreases after flooding. Zn deficiency can be caused by many factors, e.g.:
- High pH (formation of Zn(OH)2)
- Precipitation of ZnS in anaerobic conditions.
- High HCO3- concentration
- Formation of Zn-phosphates following large applications of P fertilizer.
- Excessive liming.
Asia and Oceania
