Method for improving afforestation quality of Alnus formosana

Abstract

The invention discloses a method for improving the afforestation quality of Alnus formosana. The method includes the steps of: bud seedling cultivation, seedling cultivation in light substrate containers, forest land clearing and land preparation, seedling planting for afforestation, seedling checking and complementary planting and young forest cultivation, wherein two-stage seedling cultivation is adopted, roots of bud seedlings are trimmed before transplanting is conducted, and seedling cultivation by using the light substrate containers and root pruning by air are adopted, so that growth ofmain roots is inhibited, multi-level lateral roots are promoted to grow so as to form a large number of root balls, and the stress resistance is strong; when the seedlings grow to a height of 15-20 cm, the seedlings can be taken out from the containers and used for afforestation, the period of seedling cultivation is shortened, the production cost is saved, the production efficiency is improved,and large-scale, specialized and industrialized production is achieved; the seedlings has a small transpiration area, a high water content is maintained in the seedling bodies and substrates, and theseedlings with bags are transplanted, so that no damage to the roots is caused, growth begins as soon as the seedlings is transplanted in soil, no recovery periods is achieved, and the survival rate of afforestation is 95% or above; the seedlings have no mechanical damage, obvious apical dominance and rapid growth, and is beneficial to cultivation of trunks, so that high-quality, fast-growing andhigh-yield forests are cultivated.

Description

technical field [0001] The invention belongs to the technical field of silviculture and relates to a method for improving the quality of afforestation of alder alder in Taiwan. Background technique [0002] Taiwan alder (Alnus formosana), also known as Shuikezai, Taiwan alder, and Shuiliuke, is a large deciduous tree belonging to the birch family Alnus genus, with a height of more than 20m and a diameter at breast height of 30cm. Originally produced in Taiwan, China, it is naturally distributed in flat land, foothills, river valleys, streamsides and collapsed land at an altitude of 200-3000m. It likes light, likes water and humidity resistance, and is resistant to barrenness. Water conservation tree species. Taiwan alder has a well-developed root system, and the symbiotic Actinomycetes frankii can fix molecular nitrogen in the air and enhance the fertility of forest land. It is an important pioneer tree species for afforestation. Taiwan alder grows fast, has a straight ste...

AI Technical Summary

Problems solved by technology

The height of one-year-old seedlings is 80-150 cm. In order to reduce the transpiration area of ​​seedlings and maintain the water balance in the body, bare-root seedlings are used for afforestation during production. .Journal of Fujian Forestry University, 1995,15(2):112~117; Wang Jinxi et al. Ecobiological characteristics and prospect of introduction and promotion of alder alder in Taiwan[J].Sichuan Forestry Science and Technology,2000,21(4):16~19. ), truncated height 40cm (Wang Jinxi et al. Taiwan alder ecological biological characteristics and introduction and cultivation techniques [J]. Sichuan Forestry Science and Technology, 2004, 25(1): 36~41.), truncated height 60cm (Yang Xiaojian. Taiwan Research on alder sowing and seedling raising technology system [D]. Sichuan Agricultural University, 2007: 6.), the cut-off height does not exceed 1 / 4 of the seedling height (Shuai Shucheng et al. Taiwan alder afforestation technology [J]. Sichuan Forestry Science and Technology, 2012, 33(1):40~42.), there are different opinions and no conclusions, and it is difficult to guarantee the quality of afforestation