国营大悟县李园林场地处大别山西延余脉南麓,属杉木分布北缘。总面积24339亩。从七十年代初,开展了较大面积的杉木速生丰产试验研究。结果表明,集约经营使3500多亩杉木林分材积生长量达到或超过了杉木北带速生丰产指标,大部分幼林长势旺盛,取得了明显的经济效益. State-owned Dawu County Liyuan Forest Farm is located in the southern foot of the western extension of the Dabie Mountains, a distribution of fir north edge. The total area of ​​24339 acres. From the early seventies, a large area of ​​fir fast-growing experiment was carried out. The results showed that intensive management made the volume growth of 3500 mu of Chinese fir forest reach or exceed the fast growing index of northern fir belt, and most of the young forest grew vigorously with obvious economic benefits.