Study On The Evaluation Of The Quality Of RS And GIS Based On The Plantation Of Pinus Tabulaeformis In Huanglong Mountain Forest Area

In this study,Huanglong mountain forest area was taken as the research area,Pinus Tabulaeformis plantation in this forest area was taken as the research object,and 57 pieces of standard land survey data,DEM and Landsat8 images were taken as data sources.By using the theory of quantificationⅠ,remote sensing vegetation index and GIS spatial analysis method,in support of GIS and remote sensing digital image processing system,to evaluate the site quality of Pinus Tabulaeformis plantation in the study area,and to give some related analysis in his opposition to the quality and quality of forest ecological,for fast evaluating the quality of using remote sensing technology provides.The following conclusions are obtained:（1）Tree height is an important result reflecting the growth health of Pinus Tabulaeformis,and the adequacy of soil water and nutrient content greatly affects the height of Pinus Tabulaeformis.Use SPSS 20.0 to screen the factors contribution rate of Pinus Tabulaeformis tree height,and based on the field investigation situation analysis,to extract the altitude,slope gradient,slope direction and four main factors identified as the dominant factor of Huang Long mountain forest of Pinus Tabulaeformis plantation site classification,the tree height as the dependent variable,the five main factors such as elevation as the independent variable by quantification theory equation model is established.（2）The application of the theory of quantificationⅠPinus Tabulaeformis plantation site quality evaluation model is set up equation:y=10.42556+0.723179X₁₁+2.868792X₂₁+2.696762X₂₂+2.645574X₂₄+0.468003X₃₂-1.747623X₃₃+0.75222X₄₁+0.071479X₄₂The model reached the significant level after test（P<0.05）.It can not only evaluate the growth status of bamboo forest,but also evaluate the production potential of forestless forest and predict the growth status of Pinus Tabulaeformis forest.（3）The site type map of Pinus Tabulaeformis plantation in Huanglong mountain forest area was obtained through the comprehensive analysis and research of the land classification map,administrative zoning map,slope,slope direction and elevation thematic map.It can be concluded from the figure that Pinus Tabulaeformis artificial forest land in Huanglong mountain forest region is mainly divided into 2 site type communities,8 site type groups and 72 site type areas,such as low elevation sunny slope steep slope,high elevation sunny slope steep slope,low elevation overhanging slope steep slope,low elevation overhanging slope steep slope,low elevation overhanging slope gentle slope.Among them,the site type is the mid-low elevation half-yang medium slope,which has the largest area,accounting for 3.86%of the total area of the study area,while the site type of high-altitude Yin xiashan steep slope has the smallest area,accounting for 0.05%of the forest area.（4）Huang Long mountain forest and Pinus Tabulaeformis artificial forest site quality grades are divided intoⅠ,Ⅱ,Ⅲthree levels.The distribution of Pinus Tabulaeformis plantation in forest region is reasonable.The evaluation results show that 96.93%of the forest area site quality evaluation is medium or above,indicating that the study area is suitable for Pinus Tabulaeformis plantation with reasonable distribution and good growth condition.Only a small number of Pinus Tabulaeformis forests are poor because of site conditions.From the existing conditions to predict forest types,forest site qualityⅠ,Ⅱarea there are still a lot of room to improve.（5）Through the analysis of image after pretreatment,respectively to extract the NDVI index,NDSI,humidity,temperature,and the normalized processing,finally get the ecological quality evaluation of value,it’s range is 0 to 1,and use it to evaluate the quality of forest ecosystem in the study area,the evaluation result,the study area of ecological quality evaluation of the highest value is 0.96,the lowest was 0.51.（6）The correlation analysis of forest ecological quality and site quality of Pinus Tabulaeformis plantation in Huanglong mountain forest area was carried out,and its R² was0.82.The results showed that the evaluation results of ecological quality of the study area calculated by ENVI could reflect the site quality of the forest area to a certain extent.The results of forest ecological quality can also be used to guide the planting of Pinus Tabulaeformis in Huanglong mountain forest area.