杉木“小老头”是指生势不、良,未老先衰,难于成材的杉木。但是由于对杉木“小老头”的看法不尽一致,其鉴别的标准也不一样。一般认为属于第三类林则称之为“小老头杉”。根据省林勘队1974年在西江林区的调查,生长指标为;十三年以上的杉木林分,每亩蓄积量在2.7立米以下,每亩年平 Fir “” little old man “refers to the prosperous, good, not old before the first decline, difficult to become useful fir. However, due to the different opinions on Cunningham, ”the old man“, the standard of identification is different. Generally believed that belongs to the third type of forest is called ”old man cedar ". According to the survey conducted by the provincial forestry prospecting team in the Xijiang Forest District in 1974, the growth index is: Chinese fir stands of more than thirteen years have the reserves below 2.7 cubic meters per mu;