Nutrient Deficiency Symptoms in Rice - Louisiana Agricultural ...
Nutrient Deficiency Symptoms in Rice - Louisiana Agricultural ...
Nutrient Deficiency Symptoms in Rice - Louisiana Agricultural ...
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<strong>Nutrient</strong> <strong>Deficiency</strong><strong>Symptoms</strong> <strong>in</strong> <strong>Rice</strong><strong>Louisiana</strong> <strong>Agricultural</strong> Technology& Management ConferenceFebruary 7, 2008Johnny Saichuk
Common Foliar <strong>Symptoms</strong> of<strong>Nutrient</strong> Deficiencies <strong>in</strong> <strong>Rice</strong>•Uniform chlorosis• Interve<strong>in</strong>al chlorosis•Necrotic spots• Bronz<strong>in</strong>g• Tip chlorosis or necrosis
Behavior of Common<strong>Nutrient</strong>s <strong>in</strong> <strong>Rice</strong>Mobile ElementsNitrogenPhosphorusPotassiumMagnesiumImmobile ElementsCalciumIronManganeseZ<strong>in</strong>cSulfur
Influence of <strong>Nutrient</strong> Mobility• Mobile <strong>Nutrient</strong>son Symptomolgy– <strong>Deficiency</strong> symptoms appear <strong>in</strong> oldest (lower)leaves first– <strong>Nutrient</strong> moves to youngest leaf – s<strong>in</strong>k• Immobile <strong>Nutrient</strong>s– <strong>Deficiency</strong> symptoms appear <strong>in</strong> youngest(upper) leaves first– <strong>Nutrient</strong> becomes part of plant compound
Phosphorus <strong>Deficiency</strong>
Interve<strong>in</strong>alchlorotic andnecroticspots
Potassium deficiency (orlate season sulfurdeficiency)
Youngestleavesaffectedmost
Potassium deficiency<strong>in</strong>duced by hydrogensulfide toxicity
Bronz<strong>in</strong>gFoliar necrosis
Z<strong>in</strong>cdeficiency
Chlorosis of youngestleaves worst
Uniformfoliarchlorosis
Calcium deficiency
Interve<strong>in</strong>al ChlorosisLeaf ve<strong>in</strong>schlorosis
<strong>Symptoms</strong>worst <strong>in</strong>oldestleaves
Magnesiumdeficiency
Diffuse<strong>in</strong>terve<strong>in</strong>alchlorosis
<strong>Symptoms</strong>worst <strong>in</strong>youngestleaves
Manganesedeficiency
Very dist<strong>in</strong>ct<strong>in</strong>terve<strong>in</strong>al chlorosis
Both young and oldleaves affected
Newpath Injury
Foliar symptoms alonecan be very mislead<strong>in</strong>g<strong>in</strong> diagnos<strong>in</strong>g nutrientdeficiencies
To confirm nutrientdeficiencies <strong>in</strong> the field• Apply nutrient to a markedarea <strong>in</strong> the field and follow up• Take tissue samples• Take soil samples
<strong>Rice</strong> grown<strong>in</strong> high salt<strong>in</strong>greenhouse
Johnny SaichukLSU AgCenter337-788-7547337-849-6253jsaichuk@agcenter.lsu.eduwww.lsuagcenter.com/en/crops_livestock/crops/rice
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