The results showed that the content of cobalt in plants of Wutai Mountain ranged from 0.09 mg/kg to 0.95 mg/kg, with an average content of 0.558 mg/kg, which can meet the requirement of ruminants. The cobalt content tended to increasing with raising elevation and it could be seen in each vegetation vertical zone and plant family, particularly in Leguminosae family which had a higher cobalt level than others.
3.The forest landscape was mainly distributed at the vertical zone of 300m-900m altitude, slope of 15°～45°, aspect of west, southeast, north, northeast, east and northwest. This was correlated closely with topography, vegetation type, species composition and the history of artificial disturbance.
5) In the eastern mountains of Northeast China,Betula ermanii forest is an important composition of vegetation vertical zone in mountains,and it is the timberline. The forest (WI is 20～15 ℃·month) is the zonal vegetation type,whereas the forest (WI >20 ℃·month) is the non-zonal vegetation type.
Although Mountain Altitudinal Belt Spectra Information System (1.0) has succeeded in digital integration of mountain altitudinal belt spectra, it has still deficiencies to be improved and perfected, including occasionally label illegibility, unchangeable color arrangement of altitudinal belts, dissatisfactory display of a great number of mountain altitudinal belt spectra.
The mountain-basin system(MBS) in the north of the Tianshan Mountains consists of mountain vegetation vertical belt system and concentric circular vegetation (geologic and geomorphic) system of desert basin.
The vertical zones of vegetation in Zhongtiao mountain are reanalysed based on the characteristics of present vegetation. The former zones are modified as: Platycladus orientalis forest zone (500～1000m)? Pinus-Quercus forest zone (800～1500m)?
Using the methods of quantitative classification and the analysis combining the ecological physiognomy and floristic composition, according to the altitudinal distribution of plant communities, four vertical zones of forest Vegetation may be discerned:1. The evergreen broad-leaf forest zone below 1900m;
Among the four vertical zones, the index of species number, number of individuals, species diversity index and evenness index are higher in the evergreen broadleafed forest belt than in other forest types.
By comparative study on several mountains of the plateau, two systems of the structure-type of the altitudinal belt are identified and nine groups are subdivided.
Both richness of life-form and total species richness in agiven altitudinal belt (gamma-diversity) peaked at intermediate elevations,while relative species richness of different life-form varied differently alongthe altitudinal gradient.
Any altitudinal belt should be an identical mountain ecosystem with a certain vertical range, spatial continuousness and distribution extent.
By constructing a special data structure for montane altitudinal belts, altitudinal belt data and graphs were digitally and dynamically associated.
In this altitudinal belt dripwaters were found to be undersaturated to slightly supersaturated with respect to calcite.
The effect of the humus content and composition, the humification intensity, and the pH on the paramagnetic activity of organic matter in soils of vertical zones of the Ubsu-Nur Depression was revealed.
Like other inland basins in arid regions, the natural vertical zones create special conditions for water resources transformation in the Urumqi River Basin.
Three vertical zones are described, characterised by fresh sideromelane at the top (zone 1), palagonite-smectite in the middle (zone 2), and zeolites at the bottom (zone 3).
Fluid migration is inferred from vertical zones of acoustic masking and acoustic pipes.
The total microbial community DNA of each of three vertical zones (top, middle and bottom) of a sediment core was extracted and the 16S rRNA genes were amplified by PCR, cloned and sequenced.