Study On Restoration Technology Of Ancient Pagoda Tree In Xianyang City

Ancient and famous trees are witnesses and companions of historical development.They are rare and irreplaceable forest germplasm resources and live historical and cultural heritage.They are representatives of native tree species and the basis for the development and utilization of famous trees in the region.The important cultural elements of the development of culture and spiritual civilization are the brand propagandists who create and consolidate the national civilized cities,and the load-bearing framework for the establishment of a national forest city in Xianyang.It is also the ecological foundation for the integrated development of Xi'an and Xian.It carries the important significance of tourism,culture,ecology and economic development in the region.The status quo of ancient and famous trees in Shaanxi Province is not optimistic.Most of the trees have a poor living environment and there is no need for effective rescue and protection measures(Deng Zhiting,2014).At present,Xianyang City needs more attention to protect ancient and famous trees in the rapid development.In combination with the actual situation,the basic facilities protection of the ancient and famous trees in this area is currently carried out.In the course of the investigation,the following conclusions are summarized:1.The variation coefficient of nutrient elements in the leaves of experimental ancient eucalyptus leaves is greater than the coefficient of variation of reusable nutrients.The content of N,P and K in the leaves of ancient eucalyptus was lower than that of adult eucalyptus,while the content of Ca and Fe in ancient eucalyptus was larger than that of adult eucalyptus.Most of the nutrients in the leaves of ancient eucalyptus have related links and effects,which have synergistic effects and antagonistic effects,and there is no correlation between few elements.2.The average nutrient content of ancient eucalyptus and adult eucalyptus in different experimental sites showed that the soil nutrient content of most ancient eucalyptus trees was lower than that of adult eucalyptus soil.There is a synergistic effect between N and available nitrogen in the soil nutrient of ancient eucalyptus,P has no correlation with available phosphorus,and K has a negative correlation with available potassium.There is a positive correlation between organic matter and most elements,indicating that soil organic matter is improved.To increase the content of most effective nutrients in the soil;there is an antagonistic effect between exchangeable calcium and most elements.3.A simple correlation analysis between the nutrient element content of the leaves of ancient eucalyptus and soil nutrients showed that available nitrogen,available phosphorus,available potassium,exchangeable calcium,available iron,available manganese,effective zinc,water-soluble boron and leaves in the soil.The corresponding N,P,K,Ca,Fe,Mn,Zn,B are positively correlated;the exchangeable magnesium and available copper in the soil are negatively correlated with the corresponding Mg and Cu in the leaves.It can be seen that the lack of N,P,K,Ca,Fe,Mn,Zn and B in the leaves has a direct constraint on the lower content of the corresponding effective elements in the soil.The lack of Mg and Cu in the leaves is not because The lack of corresponding effective elements in the soil may be affected by other factors such as soil compaction and soil aeration.High soil compaction and poor soil aeration will lead to a decline in the tree potential of ancient eucalyptus and adult eucalyptus,and a decrease in nutrient content in leaves.The sudden deterioration of site environmental conditions has a greater impact on ancient eucalyptus than on adult eucalyptus.4.In the case of deteriorating the soil site environment on the side of the ancient banyan tree,the movable nutrient elements can participate in the circulation and transfer to other required organs in the tree body,so that the leaves on both sides of the ancient banyan tree are N,P,K.The Mg content is kept at a certain balance.The redistribution and transport of this nutrient element in the plant is self-regulating for the adjustment of the ancient eucalyptus to poor environmental conditions.Therefore,in the case where the movable nutrients of the leaves on both sides of the ancient banyan tree are kept at a certain balance,the content of the elements that cannot participate in the circulation has an important correlation with the tree potential on both sides of the ancient banyan tree.5.Adult eucalyptus trees that grow in the soil environment with poor environmental conditions can still maintain a relatively good tree potential,but the growth potential is lower than that of adult eucalyptus with good site conditions.6.The nutrient content of the leaves of ancient eucalyptus was determined as a reference.Comparing the content of nutrient elements in the leaves of ancient eucalyptus with the initial reference standard,it was found that most of the senescent eucalyptus leaves had the lack of nutrient elements,and the well-developed leaves of ancient eucalyptus also had the lack of individual nutrient elements.7.Application of dry fertilization method for formula fertilization,nutrient solution produced by the manufacturer and nutrient solution prepared by the manufacturer.Both nutrient solutions can effectively improve the nutrient content of the leaves of ancient eucalyptus in a short time.In terms of application effect,the application of the nutrient solution formulated on the basis of nutritional diagnosis of ancient eucalyptus is better.