Research On Forest Quality Evaluation And Improvement Countermeasures Of Wu'nuer Forestry Bureau

Based on the theory of sustainable development and near-natural tending,the evaluation method of forest resource quality index,which has been tested and revised many times by the forest resource survey center of inner mongolia forestry monitoring and planning institute,based on the data of forest resource inventory from 1996 to 2018,and based on the ecological index of forest quality and ecological index,based on the data of forest resource inventory from 1996 to 2018.This paper makes a comprehensive evaluation on the forest quality of the forestry bureau of Wu Nu er,and compares and analyzes the changes of forest resources quality in recent years.At the same time,four different typical stands of the forestry bureau were analyzed by means of typical plot investigation and location observation,which were based on tree species importance,mean and average tree height,stand accumulation,density,coniferous and broad-leaved ratio,individual level distribution pattern,stand competition and stand diversity.The results show that:(1)The quality of forest resources in Urn Er Forestry Bureau is good,the forest area is 172591.3hm2,the forest coverage rate reaches 76.67%,and the forestry construction and forest protection have achieved initial success.Betula platyphylla and Larix gmelinii are the most dominant species in the forest,with an area ratio of 6:4 between the two species and a reasonable structure.The forest ecological function is in full play,with 99.81%of the forest area with complete structure or relatively complete structure,96.96%of the forest area in healthy condition and only 0.04%of the affected forest area,which is in Grade I,and the biological and ecological indicators of forest resources are highly evaluated.(2)Larix gmelinii plays a very important role in community succession.From the early stage of succession to the top,the proportion of larix gmelinii in stands is higher and higher,and the species such as birch and spruce appear less in the stands of Larix gmelinii in the forestry bureau of Unuel.(3)The xingan larch in the stand has always been in the dominant competitive state,the natural xingan larch pure forest has the room which can be transformed,and the proportion of the coniferous and broad-leaved ratio of the natural xingan larch middle-aged forest and the over-maturing forest is more balanced.Shrubs are closely related to canopy density,the greater the canopy density,the less shrub;herb is under the influence of stand density,the higher the density,the better the growth.Therefore,it is suggested that the quality of the forest can reduce the density of stand,improve the habitat of trees,remove inferior trees and shorten the period of forest cultivation.Adjust the proportion of mixed forests,cultivate forests in a targeted way,and focus on the cultivation and cultivation of native tree species to further improve forest quality.