为解决火炬松种子来源困难问题,同时也为火炬松类型划分和生产优良种子提供依据,我们采用每木调查、普查与定位观测相结合等办法,连续五年对幼龄火炬松花果进行了观察。我所引种火炬松于1975年2月造林,栽植772株,保存700株。苗木系自育的1年 In order to solve the problem of the source of seed of Pinus taeda and provide the basis for the classification and production of excellent seeds of Pinus taeda at the same time, we observed the young torch pine flower for five years in a row by using the method of combining wood survey, census and positioning observation. . I introduced the introduction of loblolly pine in February 1975 afforestation, planted 772, save 700. Nursery stocking 1 year