| 2、Forest
soil physico-chemical property index |
Unit
|
Frequency
|
| (7)soil
physical property index |
|
|
| a)soil grain composition |
|
Once every 5 year
|
| b)soil bulk density |
g.cm-3
|
Once every 5 year
|
| c)soil porosity total,
capillary porosity, non-capillary porosity |
%
|
Once every 5 year
|
| (8)soil
chemical property index |
|
|
| a)soil pH-value |
--
|
annual
|
| b)soil cation exchange
capacity |
cmol×kg-1
|
annual
|
| c)Exchangeable Calcium、Magnesium |
cmol×kg-1
|
annual
|
| d)soil Exchangeable Potassium、Sodium |
cmol×kg-1
|
annual
|
| e)soil Exchangeable Acidity |
cmol×kg-1
|
annual
|
| f)soil salt-group |
cmol×kg-1
|
Once every 5 year
|
| g)carbonate |
cmol×kg-1
|
annual
|
| h)soil organic matter |
%
|
annual
|
i)soil water-solubility salt（saline-alkali soil
measure）total salt
CO32-
SO42-
Cl-
Ca2+
Mg2+
K+
Na+ |
%
|
annual
|
j)Soil Nitrogen
Total Nitrogen
Dissolved Nitrogen
|
%
mg×kg-1
mg×kg-1
|
annual
|
k)Soil Phosphorus
Total Phosphorus
Available Phosphorus |
%
mg×kg-1
mg×kg-1
|
annual
|
l)soil Potassium
Total Potassium
rapid available Potassium
slow available Potassium |
%
mg×kg-1
mg×kg-1
|
annual
|
m)Soil Magnesium
Total Magnesium
Available Magnesium |
%
mg×kg-1
mg×kg-1
|
Once every 5 year
|
n)Soil Calcium
Total Calcium
Available Calcium |
%
mg×kg-1
mg×kg-1
|
Once every 5 year
|
o)Soil Sulfur
Total Sulfur
Available Sulfur |
%
mg×kg-1
mg×kg-1
|
Once every 5 year
|
p)Soil Iron
Total Iron
Available Iron |
%
mg×kg-1
mg×kg-1
|
Once every 5 year
|
q)Soil boron
total boron
Available Boron |
%
mg×kg-1
mg×kg-1
|
Once every 5 year
|
r)Soil Zinc
Total Zinc
Available Zinc |
%
mg×kg-1
mg×kg-1
|
Once every 5 year
|
s)Soil Manganese
Total Manganese
Available Manganese |
%
mg×kg-1
mg×kg-1
|
Once every 5 year
|
t)Soil Molybdenum
Total Molybdenum
Available Molybdenum |
%
mg×kg-1
mg×kg-1
|
Once every 5 year
|
u)Soil Copper
Total Copper
Available Copper |
%
mg×kg-1
mg×kg-1
|
Once every 5 year
|
