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通过建立观测样地，研究广西陆川县湿地松工程林的生长过程和经济效益，基本情况是林分生长正常，投资项目可行，但经济效益不够理想．其主要原因是：（１）过林密度小，每公顷仅１６６７株，（２）投入偏低；导致林分单位面积蓄积量少，按林价计算的单位面积产值较低．
Through the establishment of observation plots to study the growth process and economic benefits of the Pinus elliottii plantations in Luchuan County of Guangxi Province, the basic situation is that the stand growth is normal and the investment projects are feasible, but the economic benefits are not ideal enough. The main reasons are as follows: (1) The density of over-forest is small, only 1667 plants per hectare. (2) The input is low; the volume per unit area of stand is low, and the output per unit area is lower according to forest price.