Study on the Characteristics of Woody Debris Reserves in Hanshan Secondary Forest Area in Inner Mongolia

According to the distribution gradient of the average annual precipitation in Hanshan secondary forest area from low to high, this paper uses Saihanwula, Hanshan and Qingshan as experimental sites to explore the characteristics of woody debris(referred to as WD) reserves. The study found that the WD reserve of Saihanwula broad-leaved forest is (128.88±32.13) m³/hm², and Hanshan and Qingshan are relatively low. The reserves of Hanshan secondary forest area mainly exist in the form of fallen and standing trees, and it is preliminarily concluded that the accumulation of WD is mainly due to forest death under the background of high drought. According to the survey of WD reserves, it is found that Saihanwula is mainly of large diameter, and Hanshan and Qingshan are mainly of medium and small diameter. The study found that the reserves of WD are not only affected by altitude, but also comprehensively affected by factors such as annual average precipitation. In the future, WD will have many positive effects on the material circulation, regeneration and restoration of the ecosystem, and soil and water conservation. However, the distribution of such high reserves of WD in semi-arid areas should have a negative impact on forest ecosystem fire prevention and control, forest disease and insect pest control, forest health, forest death and other management aspects. It should be paid attention to. According to research, corresponding management measures should be formulated, so as to realize the sustainable development of forestry.