Study On The Reformation Models Of Casuarina Equisetifolia Plantation In The Daodong Forestry Farm In Hainan Province

With the improvement of living standards, the protection of the forest, the environment, social and cultural functions are becoming more and more important. To reduce the ecological risk, people began calling for sustainable forestry, emphasis on biodiversity conservation, near natural forest management arises at the historic moment. People on the different mode of operation of the forest have a deeper understanding of different results, so how to run the forest to meet future demand attaches great importance to the problem, close to the natural forest management gradually become people’s choices.In hainan island east forest farm of casuarina degradation plantation forests replanting native tree species and rare tree species as the research object, put forward the close to nature management pattern cad, in island east forest undergrowth casuarina native tree species and rare species of three kinds of transformation patterns,, put forward the island east forest afforestation of casuarina forests to carry out health management three replanting of near natural transformation model, according to test data contrast analysis of the three kinds of modes, under artificial casuarina degradation mid-maturation forest planting casuarina, neem, qiongya haitang, big leaf acacia, press 5:1:1:the proportion of 1 strip replanting,Model 2: under artificial mid-maturation forest casuarina degradation replanting mother, duck feet wood, big neem leaf acacia, Africa, according to the proportion of 1 strip replanting;Model 3:under artificial mid-maturation forest casuarina degradation replanting hainan chrysanthemum pear, loquat, qiongya haitang, wooden duck feet, according to the::the proportion of 1 strip replanting.After afforestation effect after investigation and comparative analysis, After afforestation effect after investigation and comparative analysis, the main draw the following conclusions.Under analyzing the three modes of growth, and growth of three modes comparison analysis shows that the growth difference Fvalue model of mode 2> mode 1> mode 3, therefore, in the growth of the three mode to mode 2, the most reasonable mode 2. Optimal health management mode.With comparing the analysis model of the accumulation of the accumulation of various tree species, stand and stand accumulation increment, the model of two different tree species and forest accumulation are the biggest in the three patterns, and each quarter accumulation delta is the most balanced and reasonable, the variance analysis results are significant or extremely significant level, so the model can be thought of the optimal in three patterns of health management mode.Comprehensive analysis of the results showed that the three kinds of replanting afforestation pattern formation casuarina mixed forest can effectively improve the horizontal and vertical structure of forest stand, can adjust the canopy light environment, increase under the canopy scattering light proportion for the lower vegetation growth provide effective illumination conditions; At the same time can increase the degree of species diversity and forest near nature.In the design of three test mode, in order to model the effect of the two for optimal, can more effectively improve the growth of forest stand, stand close to the natural operation of health management mode. Provide data support for the development of forest farm, at the same time under the same conditions of forests provide a scientific basis for the development of economic.