Main micronutrient deficiencies worldwide
• Iron • Zinc • Iodine - not essential for plants • Selenium - not essential for plants • Vitamin A - not essential for plants
Micronutrient deficiency in 190 soils worldwide
Macronutrients can also be deficient in foods
Malformation in children due to insufficient Calcium in diets.
一般认为不可再利
苹
用,但也有研究表明
果
有一定程度的移动性。
黄
缺 Fe 时,幼叶发黄,
叶
如华北地区果树的
病
“黄叶病”。
Iron (Fe) Deficiency Symptoms
1
2
3
4
A
B
1-Piggyback Plant, 2- Petunia, 3-Silver Maple, 4-Rose (A-normal, B-Fe-deficient)
1.01
6
碳
C
CO2
12.01
45
氧
O
O2,H2O
16.00
45
氮
N
NO3-,NH4+
14.01
1.5
钾
K
K+
39.10
1.0
钙 镁 磷 硫 微量元素 氯 铁 硼 锰 锌 铜 镍 钼
Ca