| State owned forest farm is the basic management unit of forestry ecological construction in China,which plays a key role in the process of forestry sustainable development.This thesis takes huangyugou sand control afforestation forest farm in Keshiketeng,Chifeng City,Inner Mongolia.Autonomous Region as the research object,analyzes the current situation,changes and characteristics of forest resources,analyzes and evaluates the forest management effect of the forest farm,and puts forward the countermeasures and measures for sustainable development of the forest farm through the statistical analysis of the second class data of forest resources in 1996 and 2016.The results are as follows:(1)The forest farm is dominated by shrubs,covering an area of 5580.5 hectares,accounting for 33.81% of the total area of the forest farm,and all of them have been included in the national key protective ecological public welfare forest,mainly for water conservation,wind and sand protection forest.The second is the uncultivated forest land with an area of 3800.7 hectares,accounting for 23.03%;the suitable forest land with an area of 3332.4 hectares,accounting for 20.19%;the existing forest land and open forest land with an area of 849.4 hectares,accounting for only 5.15%.The forest coverage rate was 38.6%,and the afforestation rate was 38.6%.(2)The structure of tree species is simple.The dominant tree species are poplar,elm,willow and larch.The age structure of middle-aged forest is the largest,with an area of 329.1 hectares,accounting for 41.58%,followed by young forest,with an area of230.9 hectares,accounting for 29.18%.The near mature forest is the second,and the mature forest is the least.The main shrubs are Caragana,Spiraea and Salix psammophila.(3)From 1996 to 2016,the area of woodland changed from 17763 hectares to16506 hectares,a decrease of 1257 hectares,mainly due to the land planning adjustment,land ownership and ownership confirmation.Arbor woodland,shrub woodland,unfinished woodland and non standing woodland all increased,of which,the net increase of shrub woodland was 57.96%;the net increase of woodland was 69.80%;the net increase of unfinished woodland was 69.80%.The net increase of forest land was 99.74%and the forest coverage rate was 21%,which indicated that the forest management effect of forest farm was remarkable.(4)The suitable sites of the forest farm can be divided into six site types.The area of mountain chernozem with gentle shade and middle slope was the most,accounting for48.42%;followed by mountain chernozem with gentle shade and middle slope,accounting for 21.75%.The forest land without standing trees can be divided into three site types,of which 15.29% is medium thick layer soil on gentle flat slope of dune mound,71.69% is middle layer grey cinnamon soil on sunny gentle slope,and 13.02% is middle layer grey cinnamon soil on shady gentle slope.The site quality is poor.According to the principle of suitable site and suitable tree,it is suitable to cultivate protective forest.Spruce,Pinus sylvestris var.mongolica and Ulmus pumila are selected as tree species.(5)Forest sustainable management countermeasures.According to the geographical location,natural conditions and the needs of regional sustainable development,the following management countermeasures and measures should be taken: scientific implementation of forest classification management,adjustment of tree species structure,improvement of forest quality,vigorous afforestation,development of reserve resource space;strengthening Closing Hillsides for afforestation,forest tending and restoration of degraded forests;actively striving for capital investment channels,improving infrastructure and improving forest quality Technical team level. |
PDF Full Text Request