Zinc Zn Copper Cu Nickel Ni Molybdenum Mo, etc. more than 60 kinds.
1.1.1. Components组成 in plant body
plant body
water 10%-95%
dry matter 5%-90%
organic matter﹥90%
Mineral nutrition
The study of how plants absorb吸收 and translocate转运 and assimilate同化 mineral nutrients is called mineral nutrition矿质营 养.
Section 1
Essential mineral elements of plants
Dry
cineration
matter 6000C
C→ CO2 ↑ H、O →H2O↑
air N →NOx ↑
S → H2S 、 SO2↑
Ash element: A little N,multitude S,
ash all metal elements and
involatile nonmetals. Total about 60 species
Molybdenum Mo 16 kinds
1.2.1. Four criteria of essential elements
The elements, which meet the following five criteria标准, are termed as essential elements必需元素. 1. The plant is unable to complete a normal life cycle (germination萌发 maturation成熟) if it is deficient缺乏的.