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胡桃楸直播造林成败的关键在于种子处理。本研究经两年实验观察证明,窖藏法和雪藏法处理的种子造林成活率可达85%以上。与此同时还对整地方法、造林技木、播种粒数、苗期抚育等主要技术环节进行了较为系统的研究,并提出一套行之有效的实施方法。本研究应用数量化理论分析研究了胡桃楸人工林的立地类型,并对各立地类型进行了生产力评价,确定出适宜胡桃楸生长的立地类型,作为造林时选地的依据;同时利用126株优势木冠幅直径和胸径实测数据,分析得出两者的回归关系,并据此推算出不同胸径时每公顷面积上应保留的林木适宜密度,作为抚育间伐时控制间伐强度的指标。
Juglans marsh livelihood success or failure of the key is the seed treatment. After two years of experimental observation, this study proved that the seed survival rate of seeds treated by cellar method and snow-covered method can reach more than 85%. At the same time, we also systematically studied the main techniques such as the method of site preparation, afforestation technique, seed sowing and seedling raising, and put forward a set of effective implementation methods. In this study, quantitative analysis was used to study the site types of Juglans mandshurica plantations. The productivity of each site type was evaluated, and the site types suitable for the growth of Juglans mansion were determined as the basis for selection of afforestation sites. At the same time, Wood crown diameter and diameter of the measured data, the analysis of the regression relationship between the two, and deduced therefrom at different heights per hectare of forest area should be retained appropriate density, as thinning control tending thinning index.