Analysis Of Forest Resources Change And Forest Ecological Function In Hailar District

Forest resources are the material carrier for the forest to play the ecological function.It is of great significance and role to accurately grasp the status and change of forest resources and to evaluate the ecological function of the forest.This paper,based on the image of SPOT5 in 2011 and 2015,establishes the interpretation of woodland,and obtains the data and changes of forest resources in different periods through field verification.Evaluation of ecological function.The results showed that the forest resources in Hailar were 8629hm,22.18%,0.88%of the sparse woodland 342hm,11.45%in the shrub forest land,11.45%in the shrub forest land,6.55%in the unplanted woodland,0.44%in the nursery,and 0.44%in the nursery,and 15.62%in the forest land 6077hm,and 24.23%in the forest land 9424hm,24.23%;24.23%;production of 24.23%;production.The auxiliary woodland 7253hm accounted for 18.65%;the canopy density was 0.2-0.3 area 342hm,accounting for 3.96%,0.3-0.4 area 4807hm,accounted for 55.71%,0.4-0.5 area 1670hm,accounting for 19.35%,0.5-0.6 area 829hm,9.61%,0.6-0.7 area 495hm,5.74%,0.7-0.8 area 5.02%;0.8 more area than 5.02%.Compared to 0.61%,the area of the area under the average diameter of 6cm was 4569hm2,accounting for 52.95%;the area of 6-10cm was 1915hm,accounting for 22.19%;the area of12-16cm was 1800hm,accounting for 20.86%;the area 290hm of 18-22cm was 3.36%;the area of 24-28cm was 55hm,accounting for 0.64%.According to the data comparison,the change of forest resources in Hailar area was as follows:compared with 2011,the forest land area decreased by 2221hm,the reduction ratio was 20.47%,the area of shrub and woodland decreased by 1785hm,and the proportion decreased by 28.60%;the area of forest forestland reduced 2168hm,decreased by 45.97%,and the nursery area increased by 111 HM.The increase ratio is 188.14%,the area of forest forest land is increased by 5579hm,the increase ratio is 1122.54%,the area of Yilin is increased by 655hm,the increase ratio is 7.47%;the area of the auxiliary forest land increases by 7253hm;the area of the different canopy density in 2011 and 2015 increases with the increase of the canopy density,and the main canopy density distribution of the stand.The interval is 0.2-0.4,accounting for 78.59%and 59.67%,respectively,but the two periods are different.The maximum distribution range of the canopy density in 2011 is 0.2-0.344.30%,the maximum distribution of the canopy density in 2015 is 0.3-0.4,accounting for55.71%,and the transfer relation of the average chest diameter in 2011 and 2015 is larger.The variations of 6-10cm and 12-16cm intervals were 1553 HM and 1198 Hm2,accounting for 51.19%and 39.49%of the total variation respectively.The change is mainly the average DBH of the stand in the two intervals,and the largest change rate is 18-22cm interval,the change rate is 574.42%.In 2015,the ecological function grade is"good"forest area 5178hm,which occupies60%of the forest area;the ecological function grade is"middle"forest area 3451hm~2,and occupies 40%of the forest area.Therefore,the ecological function is"good"forest,and the ecological function"middle"forest occupies less area,without the ecological function grade"The forest in the 5 different age groups is the same as that in 2011.The ecological function of the young forest is 3451 HM,which accounts for 56%of the area of the young forest,the natural forest area is 840 HM,the ecological function grade is the same as"middle",the ecological function index is 0.78,the plantation area is 8488 HM,and the ecological function grade is The area of"good"is the largest,with a total of 5877 HM,accounting for 69%of the total plantation area.The ecological function index in 2015 was higher than that in 2011,and the results of the evaluation were all"good",but due to the great proportion of plantation and more of the same age forest,the effect failed to achieve the ideal ecological function of protecting wind and fixing sand and water conservation.The natural forest can be promoted by natural forest,the regeneration rate of natural forest is added,the coniferous tree species can be replanted to change the community structure,and the natural succession process of the pioneer species can be accelerated.