| The ancient cypress group of the Huangdi Mausoleum is an important part of the Huangdi Mausoleum.It is an excellent tree germplasm resource that cannot be replicated.It has extremely high scientific value for studying the restoration of forest vegetation and geographical change of vegetation in the loess area.Previous studies on the protection of the ancient P.orientalis of the Yellow Emperor’s Mausoleum have been carried out.The ancient P.orientalis in the temple has also been thoroughly tested by the tree radar,but no systematic non-destructive testing and research has been carried out on the mountain cypress group after the mausoleum.The purpose of this study is to use TRU tree radar to carry out non-destructive testing on the ancient P.orientalis group in Houshan of Huangdi Mausoleum and the seven-star cypress group in Dongshi Lion Village of Tianzhuang Town,Huangling County,in order to explore the law of empty rot of Quercus chinensis.It provides a powerful theoretical basis for the support and reinforcement of the hollow rot cypress of Huangling ancient P.orientalis group,the protection of ancient cypress group and the investigation of the safety hidden danger of the scenic spot.The main conclusions are as follows:1.The 140 ancient P.orientalis trees tested had different degrees of air rot,and the ancient P.orientalis was divided according to the level of empty rot.There were 23 species of P.orientalis in the second grade,accounting for 16.43% of the total P.orientalis,accounting for 80% of the total;4 grades of rot of ancient P.orientalis,accounting for 3.57% of the total,the average empty rot rate of the cypress is 32.67%,and the whole belongs to the grade III moderate rot.The results of the 140 ancient P.orientalis can be used to estimate the current status of the empty rot of the ancient cypress group in Huangling,which provides a data basis for the subsequent study of the ancient cypress rot of Huangling.2.Data obtained by sampling the core of the tree through the growth cone,using the linear model,logarithmic model,parabolic model,cubic curve model,power function model,exponential model,logistic model to fit the model of the diameter and age of the oriental P.orientalis,the results show: the ancient cypress breast diameter and The optimal model of the age equation is the power function relationship model.Through the study of ancient P.orientalis rot and age,the general process of the ancient P.orientalis rot is revealed: with the increase of age,the xylem of the ancient P.orientalis trunk is dense to loose,and then loose to rot and lose vitality.The process of forming a void under dissolution and the sapwood decay.3.Within the height range of detection,the degree of empty rot of the P.orientalis trunk was negatively correlated with the height of the trunk.The lower the height of the trunk,the more serious the degree of rot.4.The empty rot of the ancient P.orientalis trunk is related to the site conditions.Controlling the same age class,the slope degree of the ancient side cedar is lower than that of the sunny slope in the different slope directions;in the same slope direction and different slope positions,the yin and sun slopes are the lowest level of the lower slope,and the upper slope position The degree of air rot is the highest,and the overall performance is that the degree of rot of the ancient P.orientalis is higher than that of the mid-slope,and the degree of cypress cypress in the middle slope is higher than that of the lower slope.5.The empty rot of the lateral P.orientalis of the ancient P.orientalis can aggravate the empty rot corresponding to the height of the main trunk,and the large stalk of the ancient P.orientalis is positively correlated with the corresponding main trunk air rot. |
