Study on Comprehensive Evaluation and Density Selection of Casuarina equisetifolia Plantation

The characteristics of wind-proof, fast -growing and high -yield of Casuarina equisetifolia plantations with densities of 1 667, 2 500, 3 333, 5 000, 6 667, 8 333 and 10 000 tree/hm² respectively were evaluated by the method of polygonal decision.The results showed that the wind -proof, fast -growing and high -yield characteristics of the stands decreased along with the increment of plantation densities.Among the seven different densities studied for Casuarina equisetifolia, the best results of wind -resistance and high -yield properties were demonstrated by the stand with density of 2 500 tree/hm², whereas the stand with density of 1 667 tree/hm² showed the fastest growing speed and it produced the second to the best of characteristics of wind -resistance and high -yield.The comprehensive evaluation index value of the stand with density of 1 667 tree/hm²was the highest and that of the stand with 2 500 tree/hm² was the second.It was suggested that the rational plantation densities of Casuarina equisetifolia in sandy soil should be around 1 667 tree/hm² to 2 500 tree/hm².