| Chang Ning is the "Camellia oleifera township"and it is national Camellia oleifera demonstration forest base county (city).It has been the traditional industries of this city for a long time. Focusing on building "the first city of China Camellia oleifera Oil",the city has put the power of the whole city to develop Camellia oleifera industry and reached out to the world in order to let its oil fragrance spreads across the country especially in recent years.The article main appraised the health status of Camellia oleifera demonstration forest in Chang Ning,and analyzed the main influence factors which were soil ferlity,diseases and insect pests,forest structure,then aimed at these three main factors,we carried out the sduty of the key technology of health management of forest tending.The main conclusions of the study as following:l.The health status appraisal of rehabilitation of low-yielding Camellia oleifera demonstration forest in Chang NingRehabilitation of low-yielding Camellia oleifera demonstration forest of Chang Ning were evaluated with fuzzy comprehensive evaluation model.The evaluation result was2.9908,and the maxi membership degree was0.3833.The results indicated that the total health state of Camellia oleifera forest was between in health and sub-health.According to the standard classification of Camellia oleifera Forest Health and Ecological implications, we could see that the economic benefits of Camellia oleifera Forest was general,stand structure was basically intact, functional coordination was basically stable. From the grading point of view, this Camellia oleifera forest area in0.0323extent was very healthy,in0.2921extent was healthy,in0.3833extent was sub-healthy,in0.2766extent was unhealthy,in0.0236extent was sick. Based on the evaluation results, the major factors of the impacting of Chang Ning Camellia oleifera health Class D were larger stand density, low input-output efficiency.The pruning measures should be arranged in reason,that will reduce stand density and increase the rate of air and light woodland and improve input-output,and finally reach to aim of avoiding Camellia oleifera forest developed into sub-health state. 2.The influence on Chang Ning new Camellia oleifera afforestation and low producing demonstration forest’s plant pests by soil preparation and tending methods.The severe plant pests appeared in Changning Camellia oleifera forest are Camellia oleifera anthracnose, tea seed weevil, citrus grey weevil and citrus oblique ridge weevil. Camellia oleifera anthracnose and tea seed weevil The camellia anthracnose, tea seed oil tea camellia weevil main harm of mature forest, citrus, citrus oblique ridge weevil are as main harm new Camellia oleifera..Different methods of soil preparation has a great influence on diseases and insect pests of the new Camellia oleifera forest, the higher the specifications of soil preparation,the plant diseases and insect pests are more serious. The plots hazard ratio of Citrus grey weevils ordering: reclamation (35.3%)> reclamation and horizontal ladder (27.7%)> with Ken (11.9%)> point cultivation (5.4%)> digging (2.1%), the plots hazard ratio of citrus oblique ridge weevil ordering:reclamation (23.1%)> reclamation and horizontal ladder (17.6%)> with Ken (13.5%)> point cultivation6.1%)> digging (1.3%), this is because of the higher specifications of soil preparation causes serious destruction of Camellia oleifera forest vegetation,and then the object of diseases and insect pests can violate reduced, lead to Camellia oleifera forest pest occurred seriously. The plots hazard ratio of Camellia oleifera anthracnose in different tending mode:Did not tend(24.3%)> knife tend (17.2%)> Reclaim (5.6%). The plots hazard ratio of Camellia Camellia weevil:Did not tend(14.2%)> knife tend (7.8%)> Reclaim (3.9%).3.Effects of foresty technologies on new Camellia oleifera planting quality and soil ferlity status.Based on the research of the five ways of soil preparation which influence Camellia oleifera survival rate in three years in Chang Ning new Camellia oleifera planting,we carried out the studies of the statistics of Camellia oleifera survival rate in different soil preparation ways and the analysis of significance of the difference.The results showed that the highest survival rate was the upward thrust moat soil preparation,which reached to93.4%.There were significant differences with several other soil preparation ways(P<0.05).The lowest survival rate was the band recalmation soil preparation,which was71.4%.The highest Camellia oleifera average tree height was hole reclamation,which reached to63.6cm;the lowest was overall reclamation,which was38.2cm.Based on the different enzyme preparation of Camellia oleifera forest soil mode analysis:Urease activity was positively related to and the average tree height, specifications of soil preparation increases easily lead to soil erosion, and have Influence on physicochemical properties of soil. The high tending management level can improve the survival rate and growth of Camellia oleifera afforestation, under0.05of the significance levels soil interaction mode, tending management as well as the two on the survival rate and have great Influence to improve the average tree height.To strengthen forest tending measures can significantly improve the yield of Camellia oleifera. Changning Camellia oleifera forest plots:Reclaim of Camellia oleifera seed yield per plant (2.5kg)> knife tend on Camellia oleifera seed yield per plant (1.8kg)> not tend Camellia oleifera seed yield per plant (0.7kg). In the low change forest demonstration area, Crown grafting of Camellia oleifera seed yield per plant is2times of the comprehensive reconstruction and4times of conventional reconstruction.The yield increasing effect is very obvious. The highest Camellia oleifera average tree height was hole reclamation, which reached to63.6cm;the lowest was overall reclamation,which was38.2cm. |
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