六盘山华北落叶松无性系种子园现状分析及低产改良关键技术探讨

Clonal Seed Orchard of Larix Principis-rupprechtii Mayr.in Liupan Mountain Current Situation Analysis and Key Technology of Low-Yield Improvement

通过对六盘山华北落叶松(Larix Principis-rupprechtii Mayr.)无性系种子园经营现状的研究,对引种选优和子代苗期测定结果进行总结评价,分析了目前造成种子园低产的原因和存在的问题,提出要完善子代测定工作,营建子代测定林,改良筹建六盘山华北落叶松1.5代无性系种子园;并采取疏伐改造,人工辅助授粉,加强土壤管理,严防落叶松叶蜂等关键技术措施进行低产改良。

Based on the survey of existing condition of clonal seed orchard of Larix Principis-rupprechtii Mayr.in Liupan Mountain,the paper summarized and evaluated the results of excellent seeds selection and determination of seedling stage of the filial generation.The causes of low-yield seeds and the existing problems were also analyzed.It was suggested that the determination of filial generation should be perfected,tree woods for determination of filial generation be planted,and clonal seed orchard of Larix Principis-rupprechtii Mayr.in Liupan Mountain for 1.5 generation be constructed.The key technologies as thinning,artificial supplementary pollination,strengthening soil management should be implemented,as well as control of larch sawfly.