Chapter 14 Micronutrient elements General Characteristics
Micronutrient elements Chapter 14 General Characteristics
Micronutrients in Soils and Crops Nutrient Soil Content(kg/ha) Corn Removal (kg/ha) Boron (B) 22-225 0.07 Copper (Cu) 2-450 0.06 Iron(Fe) 11,200-224,000 0.12 Manganese(Mn) 112-11.200 0.09 Molybdenum (Mo) 1-8 0.03 inc(Zn) 22-675 0.17
Nutrient Soil Content (kg/ha) Corn Removal (kg/ha) Boron (B) 22-225 0.07 Copper (Cu) 2-450 0.06 Iron (Fe) 11,200 – 224,000 0.12 Manganese (Mn) 112-11,200 0.09 Molybdenum (Mo) 1-8 0.03 Zinc (Zn) 22-675 0.17 Micronutrients in Soils and Crops
General Characteristics A. Micronutrients are required by all plants but in smaller amounts compared to the macronutrients Deficiencies of micronutrients can reduce growth just as much as deficiencies of macronutrients Remember the“ Law of the minimum
• A. Micronutrients are required by all plants but in smaller amounts compared to the macronutrients. • Deficiencies of micronutrients can reduce growth just as much as deficiencies of macronutrients. Remember the “Law of the Minimum”. General Characteristics
General Characteristics b The amount of micronutrient that is needed by the plant can have a narrow ange. If the amount of micronutrient is too high, it is possible for toxicity to occur Available forms 1. Cations: Fe2+ Fe3+. Mn2+ Zn2+ Cu2+ 2. Anions: MoO42, Ch- 3. Neutral: H3 BO3
B The amount of micronutrient that is needed by the plant can have a narrow range. If the amount of micronutrient is too high, it is possible for toxicity to occur. Available forms 1. Cations: Fe2+, Fe3+, Mn2+, Zn2+, Cu2+ 2. Anions: MoO4 2- , Cl- 3. Neutral: H3BO3 General Characteristics
Micronutrient function in plants 1. Enzymes and coenzymes a) Structural component of enzymes b) Involved in the activation and regulation of enzymes Oxidation and reduction reactions Micronutrients are involved in electron transport
Micronutrient function in plants 1. Enzymes and coenzymes a) Structural component of enzymes b) Involved in the activation and regulation of enzymes 2. Oxidation and reduction reactions Micronutrients are involved in electron transport