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钻天柳(Chosenia macrolepis (Turcz·)Kom)因冬季枝条变为红色,故有“红梢柳”之称。树干通直,树高达30m,胸径1m以上。生长快、树型美观,是东北地区耐寒、速生、美化环境的优良乡土树种。但用常规育苗方法繁殖困难,硬枝扦插难以生根。为了探索提高扦插成活的方法,自1981年开始进行钻天柳硬枝扦插育苗试验,其中倒插穗材生根后再移植正插,取得了良好的效果。一、试验地基本情况试验地设在本所苗圃,年均气温6.2℃,年降水量850—900mm,无霜期平均为138天。土壤为砂壤土,前茬为白榆播种育苗地。
Chosenia macrolepis (Turcz.) Kom) is known as “red shimmering willow” because winter branches turn red. Trunk straight, the tree up to 30m, diameter more than 1m. Grow fast, beautiful tree, is the Northeast cold, fast growing, landscaping fine native tree species. However, breeding methods using conventional breeding difficulties, difficult to root hardwood cutting. In order to explore ways to improve the survival of cuttings, since 1981, the experiment of hardwood cutting propagation was carried out, in which the inserted cuttings were rooted and then transplanted, with good results achieved. First, the basic conditions of the experimental site located in the nursery, with an average annual temperature of 6.2 ℃, the annual precipitation 850-900mm, an average of 138 days frost-free period. The soil is sandy loam and the former crop is planted with elm seeds.