| 5、Forest
community properties index |
Unit
|
Frequency
|
| (17)general
index |
|
|
| Average thickness of
litter layer |
mm
|
annual
|
| Natural regeneration(varieties
of tree、density、quantity and seedling height) |
mm
|
annual
|
| (18)forest
community structure index |
|
|
| Age |
year
|
Once every 5 year
|
| Origin |
year
|
Once every 5 year
|
| Average tree height |
m
|
Once every 5 year
|
| Average breast diameter |
cm
|
Once every 5 year
|
| Density |
sapling/hm2
|
Once every 5 year
|
| Composition |
--
|
Once every 5 year
|
| Quantity of animal and
plant |
--
|
Once every 5 year
|
| Closing degree |
--
|
Once every 5 year
|
| Leaf Area Index(LAI) |
--
|
Once every 5 year
|
| Average height of woodland
vegetation（subarbor、shrub、herbal） |
--
|
Once every 5 year
|
| Total covering |
--
|
Once every 5 year
|
| (19)forest
community productivity index |
|
|
| Height increment |
m
|
annual
|
| Breast diameter increment |
cm
|
annual
|
| arbor biomass（trunk、branch、leaf、fruit、flower、root） |
kg
|
annual
|
| Shrub layer、herbal layer
biomass |
kg
|
annual
|
| Wither |
kg
|
annual
|
| (20)forest
community nutrient index |
|
|
| C |
mg×dm-3
|
Once every 5 year
|
| N |
mg×dm-3
|
Once every 5 year
|
| P |
mg×dm-3
|
Once every 5 year
|
| K |
mg×dm-3
|
Once every 5 year
|
| Fe |
mg×dm-3
|
Once every 5 year
|
| Mn |
mg×dm-3
|
Once every 5 year
|
| Cu |
mg×dm-3
|
Once every 5 year
|
| Ca |
mg×dm-3
|
Once every 5 year
|
| Mg |
mg×dm-3
|
Once every 5 year
|
| Cd |
mg×dm-3
|
Once every 5 year
|
| Pb |
mg×dm-3
|
Once every 5 year
|
