Study On The Characteristics Of Vegetation Restoration In The Burned Area Of The Greater Xing'an Mountains

In this paper,the Burned areas in the forest area of the Greater Xing'an Mountains in Inner Mongolia are taken as research objects.The vegetation restoration of the burned areas of the Larix gmelinii forest under different fire disturbance intensity and different regeneration methods is studied to provide a theoretical basis for the forest restoration and reconstruction in this area.1.A certain intensity of fire disturbance during a period of time is conducive to the continuous renewal and restoration of plant species diversity in the forest community.After fire disturbance,the average DBH of tree species increased,and the DBH distribution frequencies of the forests were consistent with the Weibull distribution as a unimodal left-tilted distribution.The species diversity of vegetation after fire disturbance is closely related to the intensity and duration of the fire,and the plant species are the most at 10 years after the fire disturbance.The species diversity index of burned areas in different years has become more complicated due to changes in recovery time,and its diversity index generally increases first and then decreases.2.After 4 years of fire disturbance restoration,the soil bulk density showed an upward trend,and the soil water content decreased.With the increase in the year of restoration,the change range gradually reduced and returned to the level before the fire when the fire disturbance restoration 10 years.The impact of severe fire interference is the most serious,and the recovery time of severe fire interference samples is also longer than that of the other two intensity samples.The soil pH,total nitrogen,and total phosphorus recovered within 4-16 years after the fire disturbance,and with the increase of recovery time,the range of change gradually reduced.After 16 years of recovery,there is basically no significant difference between the soil chemical properties of the three-intensity fire disturbance plots and their control plots.3.After the fire disturbance,the forest stand formed by man-made disturbance has a large accumulation,and the growth of the stand is good after tending.The average DBH of the artificially renovated larch forest is higher than that of the naturally regenerated birch forest,indicating that the forest can be further nurtured and renewed after fire disturbance in the future.Perform parenting updates.Accelerating the progress of forestation in severely damaged areas will help accelerate the rapid development of forests towards top communities.