Casuarina Equisetifolia can not only grow, but also bloom after 5 years' introduction trial, the annual height growth reaches 46~170 cm, increment of DBH is 1.8~12.0 mm per year, average annual increment of ground diameter is 5.1~20.5 mm.
(5)By using of nutrition-bag of 10 cm×15 cm,seedlings grown in the soil contained 50% humus had average height of 23 2 cm and average ground diameter of 0 3 cm,which reached the standard of the best seedlings;
Adopting 6 transplanting densities(20cm×20cm,20cm×10cm,20cm×7.5cm,20cm×5.0cm,20cm×4.0cm,20cm×3.3cm) of seedling of Pinus sylvestris var.mongolica,the experimental results showed that the height growth of seedlings was not significantly different. The variation of ground diameter reached 1%.
Compared with those of CK, the height, basal diameter, number of lateral root, length of main root, aboveground fresh weight, underground fresh weight, total weight, length of primary lateral root of the seedlings treated with Pt microbial preparation increased by 23.1%, 8.7%, 23.1%, 21.0%, 25%, 33.3%, 26.7%, 49.2% respectively.
On this condition of increasing the products Of grape for two years, the seedling's high, basal diameter, range of crown, length of new shoot and side branch respectively increased 18.2～68.9%, 16.7～66.7%, 33.8～124.2%, 18.6～61.9% and 33.2～67.3% in the same field compared with check.
For four years' Chinese fir tree height increment was highter than control plots by 66.7 per cent and72.9 per cent, diameter at ground height increased by 98.9 per cent and 105.9 per cent respectively;
Ⅰ,Ⅱ and Ⅲ,were preliminarily categorized,among which seedlings with height≥18.5 cm and base diameter≥0.29 cm were clustered in the Class Ⅰ,seedlings with 15.5 cm≤height ≤18.5 cm and 0.24 cm≤base diameter≤0.29 cm were in Class Ⅱ,and seedlings with height ≤15.5 cm and base diameter≤0.24 cm were in Class Ⅲ.
In the ecotone betweenBetula emanii and alpine tundra, the number and diameter at ground level ofBetula ermanii in the plots were measured.
According to the correlation between diameter at ground level (DGL) and age, the diameter at ground level can represent age directly.
There exists a significant correlation between the diameter at ground surface (DGS) and DBH.
Among these traits, stem diameter at ground level appeared to be a good indicator of yield.
veitchii seedlings in soil or on logs), there was no significant difference in height or total root weight (sum of adventitious roots and primary roots), but diameter at ground level and number of TBS were significantly different.
The resulting InAs islands are coherently strained, and their base diameter varies from 20 nm to 90 nm.
In-stream large woody debris (LWD) in two segments of the river channel was investigated with base diameter, top diameter, length, and decay class.
Significant associations were found between markers and height increment, internode number, internode length, base diameter increment, base diameter after 9 years of growth, branch number, and leaf break.
Epitaxial islands of 30-40?nm in base diameter and 11?nm in height and having a density of about 6×1010?cm-2 were produced on (001) Si by molecular beam epitaxial growth of Si/Si0.5Ge0.5 layers with in situ implantation of 1-keV As+ ions.
The diameter of the wind-receptor hairs varies with the square root of the distance from the hair tip, i.e., the diameter rapidly increases with the distance from the tip and is asymptotic to the base diameter.