火炬松是我国引种成功的国外松树之一,但有关土壤物理性状对火炬松生长影响的报道却较少.因此,找出适宜火炬松生长的土壤条件,为科学地制订造林规划提供必要的依据,是十分必要的.试验地概况试验地点为东经118°27′—118°40′,北纬34°17′—34°40′的江苏省东海县李埝林场、西山林场、石湖林场和新沂县的踢球山林场.前两单位属低山丘陵地貌,后两单位为山前岗地.试验林地均较平缓,土壤质地为轻壤土和砂壤土.土壤PH值在6.0—6.5之间,有机质含量差别不大,为0.63—0.88%.年平均气温13.7℃;无霜期224天,年降水量860毫米,年蒸发量1694毫米,年平均相对湿度为71%,雨量58%集中在6、7、8三 Pinus taeda is one of the foreign pine trees introduced successfully in our country, but there are few reports on the effects of soil physical properties on the growth of Pinus taeda, therefore finding out the soil conditions suitable for the growth of Pinus taeda and providing the necessary basis for scientifically planning afforestation , It is very necessary to test the situation of the test site for the East longitude 118 ° 27’-118 ° 40 ’, north latitude 34 ° 17’-34 ° 40’ in Donghai County, Jiangsu Province, Li Zhu forest, Xishan Forest Farm, Yixian kickball Hill forest.The first two units belong to hilly landform, the latter two units for the hilltop posts.The experimental forest are relatively flat, the soil texture is light loam soil and sandy loam soil PH value between 6.0-6.5, The annual average temperature is 13.7 ℃, the frost-free period is 224 days, the annual precipitation is 860 mm, the annual evaporation is 1694 mm, the annual average relative humidity is 71% and the rainfall is 58% , 8 three