Afforestation Effect of Three Species of Seedlings Growing with Light Media in Net Container
A comparative trial of afforestation of annual and biennial container seedlings growing with light media and bare root seedlings in three different site types was conducted to study the differences in survival rate, preservation rate and seedling growth of three important afforestation species, Schima superba, Cyclobalanopsis glauca and Pinus elliottii. Result showed that the afforestation effect could be significantly improved by using the seedlings growing with light media in net container. The survival rate and preservation rate of different species of container seedlings were 27.6% -1421.8% higher than those of bare root seedlings in different types of sites (cutting blank, land under the canopy and biological fire belt). Seedling height, stem diameter at ground level, length of current-year tip and accumulated amount of dry matter of container seedlings of different species were 22.0% -86. 7% higher than those of bare root seedlings. The survival rates of the annual container seedlings of three species planted in February, May and September ranged from 93. 8% to 98.0% , 90.7% to 96.3% and 84.5% to 89.4% , respectively, all of which meet the demand for qualification rate of afforestation and ensured the possibility of afforestation all the year round. However, the survival rates of the annual bare root seedlings planted in May and September only reached 26%-53% and 10.4%-34.4% , respectively, which were much lower than the qualification rate of afforestation. The afforestation costs of the annual and biennial container seedlings of different species were 10.3%-18.4% and7.1%-14.4% lower than those of the bare root seedlings, respectively. It is concluded that afforestation with seedlings growing with light media in net container should be broadly popularized, for it has many advantages such as high survival rate, growth dominance and low cost.
NETL
NSTL
万方数据
维普
