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思茅松(Pinus kesiya Royle ex Gord. var. langbianensis (A. Chev.) Gaussen)为云南西南部主要针叶树种。林地面积为115万ha,占全省林地总面积的11％;蓄积量为1269.2万m~3,占全省总蓄积量的10％。其中中幼龄林约占45％,现正处于林木分化时期,急待抚育间伐。为此,我们在思茅松分布区的景东、镇远、普洱、墨江、思茅等地做了一些调查研究工作,现将初步结果报道如下。
Pinus kesiya Royle ex Gord. Var. Langbianensis (A. Chev.) Gaussen is the dominant conifer species in southwestern Yunnan. The forest land area is 1.15 million ha, accounting for 11% of the total forest land area in the province. The stock volume is 12,692,000 m 3, accounting for 10% of the total reserve in the province. Among them, young and middle-aged forest accounts for about 45%, and is now in the period of tree differentiation, and it is urgent to cultivate thinning. For this reason, we did some research work in Jingdong, Zhenyuan, Pu’er, Mojiang and Simao areas in the distribution area of Simao pine, and the preliminary results are reported as follows.