Effects Of Different Forest Management Patterns On Stand Structure And Ecological Characteristics In Wangyedian Experimental Forest Farm, Chifeng

Forest management is the eternal theme of modem forestry construction, strengthen forest management work is important for improving the quality of forest, changing forestry development, development of sustainable forestry and ecological forestry, to address climate change and promote green growth. Therefore, depth study of related technologies of forest management, detailed management mode and through long-term comparative analysis of operating results establish best forest management model in line with the different types of forest management has important scientific and practical significance.This study of artificial (Pinus tabulaeformis Carr.), (Larix principis-rupprechtii Mayr)and the Natural secondary forest in Inner Mongolia Wangyedian foresty and survey the three management patterns of nearly natural operation, routine operation and undisturbed operation modes. Analyse the influence results of different forest management for forest ecological characteristics and thus to determine the kind of forest management pattern to achieve the best ecological benefits and provide theoretical support for the Wangyedian foresay forest management. The results showed that:(1) The average DBH and stand basal area basically were shown:Nearly Natural Management> no interference management>General management, average tree stand high are:nearly natural management> general management> interference-free operation. Diameter distribution and tree height distribution of three forest management patterns are general showing category normally distributed, that ends less number of trees in the middle high. Diameter class distribution of three kinds of natural secondary forest management mode were shown inverted " J" type, that is the number of trees at a stage more trails, with diameter class increase, the number of trees decreases.(2) The terms of biomass:understory vegetation biomass per unit area of three operating modes shown nearly natural management is superior to conventional business operations and non-interference, which is more conducive to the formation of near-natural management of forest vegetation diversity, and more in favor of the construction of the ecological environment.(3) Richness and evenness of herbaceous vegetation under nearly natural management of Pinus tabulaeformis are below the undisturbed operation and routine operations, but middle-aged forest and young forest is opposite. Comparison the artificial Pinus tabulaeformis forest and artificial Larix principis-rupprechtii at different ages order the results of abundance index were have a opposite trend. Pielou’s evenness index of nearly natural management pattern were higher than routine management pattern and no interference management. The of law natural secondary forest generally as follows: human disturbance intensity increases, the richness showed a decreasing trend.(4) The litter water-holding capacity of three forest stands under different forest management pattern were consistent in the law, which is routine management nearly natural operation> operate without interference. Litters storing capacity with increasing intensity increases forest stands interference(5) The physical properties for three forest stands of different forest management models were with the greater the degree of human disturbance the soil bulk density greater and lower soil moisture content, that is comparison the routine management pattern the nearly natural operation and operate without interference pattern are more conducive to the formation of soil organic matter.In summary,near natural forest management pattern is more conducive to improving stand structure and ecological functions and the nearly natural forest management is effective management measures.