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华山松是云南省主要造林树种一,历年来多采用直播和“百日苗”植苗(?)林。1976年,梁王山林场在实践中探索(?)一种“双月苗”植苗造林方法,与直播造林(?)“百日苗”造林相比,造林成活率显著提高(?)而造林成本却大幅度下降。现将有关情况(?)报如下: 一、“双月苗”造林的兴(?) 梁王山林场地处海拔2,20-2,800米的高寒山区,年均气温12℃;年降雨量约1,100毫米,6-10月的降雨量占总降雨量的80%左右,干湿季分明。这里的(?)地条件适宜华山松生长。1974年以前,该场营造华山松一直采用直播方法。因种子被鼠、(?)大量偷食;发芽出土
Huashan pine is the main afforestation tree species in Yunnan Province, over the years the use of direct seeding and “Hundred Days seedling” seedlings (?) Forest. In 1976, Liangwangshan Forest Farm explored (?) A bimonthly seedling afforestation method in practice. Compared with direct seeding afforestation (?) “Hundred Days seedling” afforestation, afforestation survival rate significantly increased (?) And afforestation The cost has dropped significantly. The relevant information (?) Is reported as follows: I. “Bimonthly” Afforestation Xing (?) Liangwangshan forest farm is located in an area of 2,20-2,800 meters above sea level in the alpine region, with an average annual temperature of 12 ℃; annual rainfall of about 1,100 Mm, June-October rainfall accounts for about 80% of the total rainfall, dry and wet season clear. Here? (?) Conditions suitable for the growth of Pinus armandii. Before 1974, the site to create Huashan pine has been using live methods. Due to the seeds by rats, (?) Large number of stealing food; sprouted unearthed