Method for converting artificial timber forest into ecological public welfare forest

Abstract

The invention discloses a method for converting an artificial timber forest into an ecological public welfare forest, which comprises the following steps of: comparing the diameter at breast height, crown breadth or / and tree height of object trees in the artificial timber forest to be converted with adjacent trees, screening, determining and marking the object trees to be cut; determining the forest cutting strength, and performing cutting; and then carrying out nursery stock complementary planting. The method disclosed by the invention is simple, convenient and easy to implement, the forest scale result is accurate, the forest land transformation effect is obvious by adopting the method, the transformed forest stand structure develops towards the multi-layer, different-age and mixed directions, the space structure of the forest stand is obviously optimized, the original site conditions are effectively improved, the mixed degree is increased, and the population isolation degree is greatly improved; the forest stand leaf area index is reduced, and the in-forest penetration rainfall is obviously increased; the thickness of the litter layer under the forest is reduced, the maximum water-holding capacity is reduced, and more moisture permeates into the soil layer and is stored by the forest; and under-forest species diversity, forest stand stability and health index are improved.

Description

technical field [0001] The invention relates to a method for adjusting or transforming a stand structure, in particular to a method for transforming a stand structure of an artificial timber forest, and belongs to the field of stand structure and restoration in forestry science. Background technique [0002] Most of the existing artificial timber forests originated from the "Northwest Region Planting and Grass Activities" that began in the 1980s. The artificial timber forests formed in accordance with the old "Afforestation Technical Regulations GB / 15776" are mostly pure forests of the same age. The forest stands are generally dense and equally spaced horizontally and vertically; these forest stands have made great contributions to increasing vegetation coverage and protecting and restoring the ecological environment for a long time. [0003] At the beginning of this century, after China’s forestry industry began classified management, a large area of ​​plantation and second...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of conversion from artificial timber forest to ecological public welfare forest in view of technical problems such as difficult measurement and complicated calculation of spatial structure parameters in the conversion process of existing artificial timber forest to ecological public welfare forest, which is not conducive to the specific operation of forestry practitioners at the grassroots level The method of the present invention can determine whether the felling of the object wood is by comparing the diameter at breast height, the crown width, and the height of the object wood and its adjacent trees in the forest land, the operation is simple, convenient and easy, and the forest tree inspection ruler investigation result is accurate; The forest land conversion effect of the method of the present invention is remarkable, and the forest stand structure after transformation gradually develops towards multilayer, different age, and mixed directions, and the forest stand space structure has been obviously optimized, and the original site conditions have been significantly improved; the mixed degree has increased, The degree of population isolation was greatly increased; the leaf area index of the stand decreased, which significantly increased the through-rainfall in the forest; the thickness of the litter layer under the forest decreased, and its maximum water holding capacity decreased, so that more water infiltrated into the soil layer and was stored by the forest; Increased understory species diversity, stand stability and health indices

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