前言落叶松的造林问题近年来受到人们的重视。日本每年营造的落叶松林大约占造林总面积的六分之一,约为6万公顷。特别是在北海道、东北地区和内地的亚高山地带,由于找不到适当的树种来代替落叶松,落叶松的造林比重大大地增大。1957年以来落叶松的造林面积已超过柳杉而占第一位。由于落叶松具有育苗容易、苗木两年即可出圃、初期生长很快、3—4年 Foreword Larch afforestation issues in recent years by people’s attention. Japan larch forests each year to create about one-sixth of the total area of ​​afforestation, about 60,000 hectares. Especially in Hokkaido, northeastern China and the sub-alpine region of the hinterland, the proportion of larch afforestation has greatly increased due to the lack of proper tree species to replace larch. Since 1957, Larix afforestation area has surpassed Cryptomeria and occupies the first place. Due to larch seedling with easy, nursery stock can be two years, the initial rapid growth, 3-4 years