张掖地区华北落叶松苗期生长规律的研究

在物候观测、播种育苗及样地观测的基础上，研究了华北黎叶松苗木生长规律以及不同环境因子下幼苗的生长馈况，结果表明，塑料大物、塑料薄膜、土温室育苗都是行之有效的科技措施，华北露叶松属阳性材种，除当年播种苗需遮荫外，以后各个生育期需要在全日照条件下生长发育。此研究为加速苗木培育提供了理论依据和可行措施。

Research on seedling growth of Larix principis-rupprechtii in Zhangye

On the base of observation at biotemperature, raising seedling and the investigation for plot, have studied the growth rhythm of Larix principis-rupprechtii and environment factor of influencing growth , and thinks plastics shed, plastics film .hothouse all are feasible measures for raising seedling. Larix principis-rupprechtii belongs positive species , in its first year, who need shade , afterword, do not . This study provides theory basis and feasible measure for quickly raising seedling.