Building method for sweetgum and liriodendron mingled forest

Abstract

The present invention discloses a building method for a sweetgum and liriodendron mingled forest. The method comprises the following steps: collecting high-quality seeds of sweetgum and liriodendron from a natural mother forest to cultivate annual bare-rooted seedlings for building the forest; performing fostering in first two years after forestation, wherein the forestation mode is mixed forestation of sweetgum and liriodendron in a ratio of 1: 1, namely a row of sweetgum and a row of liriodendron; in an initial planting stage, controlling the density to be 2500-3333 plants / hm<2> and controlling the seedling distance to be 1.5*2.0 m; and after forest establishment, adjusting the density to be 2500 plants / m2 and controlling the seedling distance to be 2.0*2.0 m. The method provided by the invention can obviously improve the physical and chemical properties, and the soil fertility is improved; greening can be enriched and afforestation tree species are beautified, the production capacity of the forest is improved, various effects of the forest can be exerted, and the ecological balance is accelerated; the construction of a high-efficiency forest land production system can be accelerated, and the construction of the ecological system with virtuous circle can be further accelerated; and the method has economical and ecological benefits. The method is suitable for building the sweetgum and liriodendron mingled forest.

Description

technical field [0001] The invention relates to forestry, in particular to a method for creating a mixed forest of sweetgum and tulipifera. Background technique [0002] Plantation is an important part of the world's forest resources and plays a huge role in the restoration and reconstruction of the ecological environment and economic development. With the enhancement of my country's comprehensive national strength and the promotion of the importance of forestry ecological construction, the area of ​​planted forests has increased year by year, and has now become the country with the largest area of ​​planted forests in the world. However, the single species and stand structure of plantation forests in my country restricts the development of the benefits and service functions of plantation forests. Compared with coniferous species and pure forests, broad-leaved tree species or mixed forests have greater advantages in soil fertility maintenance, ecological benefits and enrich...

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Problems solved by technology

[0003] In order to further enrich and enrich the plantation of sweetgum sweetgum and Liriodendron chinensis, and to better exert the ecological and economic benefits, many scholars have carried out research: Yang Jinchang et al.’s preliminary research on the influence of different afforestation plant row spacing on the growth of sweetgum sweetgum young forests showed that the 4.5-year-old forest The DBH, HT, CW, etc. of afforestation tended to increase with the increase of row spacing, and the trunk shape showed a decreasing trend with the increase of row spacing, and different row spacing only had an effect on tree height (P2 It is advisable to control the density of medium-diameter timber at 2500 plants / hm 2 It is more suitable, stand density has a great influence on the growth of DBH, single trunk volume and standing stock volume of Liriodendron tulipiflora; Huang Yonglai's research on the function of fertilizing soil in mixed forests of different tree species shows that the improvement effect of sweetgum + Liriodendron tulipifera is the best , but there are few research reports on sweetgum + Liriodendron mixed forest, which limits the management of this type of forest to a certain extent

[0004] In the Chinese patent database, there is only one application involving mixed forestation methods, No. 200310111108X, "A Method for Sowing and Planting Afforestation by Mixing Pinus Simao Seeds and Crop Seeds" applied by the Xishuangbanna Tropical Botanical Garden of the Chinese Academy of Sciences. So far, there has been no application involving the creation of sweetgum sweetgum Application documents for mixed forest with tulip tree

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