A rapid broad-leaf transformation method for degraded pine forests on East China Sea islands

Abstract

The invention discloses a rapid broad leaf transformation method for a degraded pine forest on islands of the East China Sea. In the pine forest with nematodosis hazard on the islands, continuous clearing of disease-infected wood of pine and tending are mainly adopted, artificial regeneration of broad-leaved trees is adopted, and broad leaf transformation and recovery of the degraded pine forest are realized. Due to the fact that potential plants and proper tending measures are difficult to find, a large quantity of depreciating tree species of broad leaf pioneers in the forest invade, the stand structure is simple, the quality is poor, updating is difficult and the protection effectiveness is poor. Zontal potential species as functional target edificators, sanitation cutting and tending,complementary planting of potential tree species, tending of young forests, density control, forest stand management and other techniques are adopted, the forest stand structures, the composition of tree species and the number of dominant trees of the degraded pine forest can be effectively improved, and zontal climax community succession of forests is remarkable promoted. By means of the method,the forest stand site conditions, the forest community quality and economic and ecological benefits are improved, and the method has broad application prospects in transformation of the degraded forests on the islands.

Description

technical field [0001] The invention relates to a broad-leaved transformation technology for degraded forests, in particular to a rapid broad-leaved transformation method for degenerated pine forests on islands in the East China Sea. Background technique [0002] The ecological environment of island shelterbelts in the East my country Sea region of China is fragile and afforestation is difficult. In the past 20 years, due to the outbreak of pine wood nematode, the island masson pine (Pinus massoniana) and black pine (Pinus thunbergii) forests have been wiped out, and most of the island pine forests have been completely degraded. At present, how to reverse the degradation trend of degraded masson pine and black pine shelterbelts, so that the ecological protection benefits of island forests will not be interrupted, has become a difficult point in the management of island shelterbelts. [0003] The use of traditional forestry theory and forestry techniques often restores slowl...

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Problems solved by technology

[0004] 1) The common practice is to perform sanitary felling, clearing and tending of all trees in the pine forest first, and then close the mountain for afforestation, and let it recover naturally. After the closure of the mountain, pests and diseases broke out again, the trees were damaged, a large number of positive depreciation species invaded, there were few native broad-leaved value-added species, the forest stand was barren, and the recovery was slow

[0005] 2) After adopting hygienic felling and tending in the degraded pine forest, the method of replanting and tending in small blocks or strips on the open space, due to improper selection of tree species and ineffective tending measures, a large number of sun-growing broad-leaved pioneer tree species invaded, resulting in replanting The preservation rate of young trees is low, the growth is slow, the renewal is difficult, the investment is large, and the effect is not good

[0006] Therefore, there are two key factors restricting the transformation and recovery of degraded pine forests after pine nematode damage. One is the lack of sufficient potential tree species in the succession stage of pine forest communities; the other is the lack of a set of scientific and systematic management techniques.

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