表1-1正常生长的植株中营养元素的平均含量( Stout,PR.) 元素 干物质中的含量 相当于钼原 amol/ g μgg %子数的倍数 0.001 0.1 Cl 0.10 6.0 100 0.30 20 300 M 50 1000 B 2.0 20 2000 Fe 2.0 100 2000 eIsP 100 3000 30 0.1 30000 60 0.2 60000 80 0.2 80000 Ca 125 0.5 125000 250 250000 KNOCH 1000 1.5 1000000 30000 45 30000000 40000 45 40000000 60000 6000000
表1-1 正常生长的植株中营养元素的平均含量（Stout，P.R.） 元素 干物质中的含量 相当于钼原 μmol/g μg/g % 子数的倍数 Mo 0.001 0.1 1 Cu 0.10 6.0 100 Zn 0.30 20 300 Mn 1.0 50 1000 B 2.0 20 2000 Fe 2.0 100 2000 CI 3.0 100 3000 S 30 0.1 30000 P 60 0.2 60000 Mg 80 0.2 80000 Ca 125 0.5 125000 K 250 1.0 250000 N 1000 1.5 1000000 O 30000 45 30000000 C 40000 45 40000000 H 60000 6 60000000
MINERAL NUTRIENTS (mainly obtained from soil) Macronutrients K Ca Mg P s Si kg DV 15 Micronutrients Cl Fe b Mn Na Zn Cu Ni Mo mg/kg DW 10010020 10 20 60.10.1
Concentrations of essential elements in leaves sugar ane rIc corn Soybean macronutrients Nitrogen 2.5 4.0 Potassium 1.0 1.9 Phosphorus 0.05 0.25 Magnesium 0.1 0.1 0.25 0.25 Sulfur 0.1 0.1 0.2 0.25 Calc ium 0.1 0.15 0.15 0.15 micronutrients ppm Iron 10 70 15 50 Chlor ine 20 25 Manganese 20 20 15 20 Zinc 10 10 15 20 Boron 3 10 20 Copper 5 10 Silicon Molybdenum 0.1 0.1 Data, represent the lowest concentrations found in recently matured leaves of healthy plants Higher levels are commonly found
Concentrations of essential elements in leaves sugarcane rice corn Soybean macronutrients % Nitrogen 1.5 2.5 3.0 4.0 Potassium 2.2 1.0 1.9 1.7 Phosphorus 0.05 0.1 0,25 0.26 Magnesium 0.1 0.1 0.25 0.25 Sulfur 0.1 0.1 0.2 0.25 Calc ium 0.1 0.15 0.15 0.15 micronutrients ppm Iron 10 70 15 50 Chlorine 20 25 Manganese 20 20 15 20 Zinc 10 10 15 20 Boron 1 3 10 20 Copper 2 5 5 10 Silicon 5 Molybdenum <0.1 <0.1 0.1 0.7 Data, represent the lowest concentrations found in recently matured leaves of healthy plants. Higher levels are commonly found