火炬松是美国种植最广泛的松树,它的天然分布区虽然接近田纳西州南部边界的阿巴拉契亚山西部,但它还是向北几百英里森林区域内的主要造林树种。冬季,在火炬松天然分布区北部和更靠北的人工林中叶子普遍变黄,这种变黄在其它南部松林中通常与早期矿物质缺乏有关。火炬松林中的林地条件低劣,林业工作者认为在冬季这种现象很正常,因此,能否将火炬松冬季的叶子变黄做为国内高山地区火炬松营养含量的 It is one of the most widely grown pine trees in the United States. Although its natural distribution is close to western Appalachia in the southern border of Tennessee, it is also a major afforestation species in the hundreds of miles north of the forest. In winter, leaves generally yellow in northern Pinus armandi and more northerly plantations, which are often associated with earlier mineral deficiencies in other southern pine forests. In the Pinus tabulaeformis forest, the woodland conditions are poor, and the forestry workers think this phenomenon is normal in winter. Therefore, it is possible to turn the winter lobular leaves of Pinus taeda into the nutrition content of the domestic mountainous area of ​​Pinus taeda