云南松和华山松(以下简称“两松”),是我省荒山造林的主要树种,每年的造林面积大约占造林总面积的百分之七十左右。其造林方法原来各地多半是用种子直播。近年来,玉溪地区的许多地方,因为自然条件的变异,“两松”直播造林往往因鼠、雀大量偷食种子,普遍形成造林不见苗。例如:玉溪县洛河乡林业重点户白启高,一九八三年六月上旬在自留山块状整地直播云南松九十多亩,全部造林地只出苗 Pinus yunnanensis and Pinus armandii (hereinafter referred to as “Pinus sylvestris”) are the major tree species afforestation in the barren hills of our province. The annual afforestation area accounts for about 70% of the total afforestation area. The original afforestation method used to be mostly live on the seeds. In recent years, many places in Yuxi area, because of the variation of natural conditions, “two loose” live afforestation is often due to rats, birds a large number of stealing seeds, the general formation of afforestation is not seen seedlings. For example: Luhe Township, Yuxi County forestry key white Kaiqi high, in early June 1983 in the plots of soil self-retaining block live Yunnan ninety acres, all afforestation only seedlings