摘要
为了找出影响飞播油松成苗的主要因素 ,采用随机抽样调查方法和机械抽样调查方法 ,对滦平县历年的飞播区进行了调查分析。结果表明 ,降水过程是影响飞播油松成苗的主要因素。
In order to find out the principle factors that affect the seedling stand percent of Chinese pine in air-seeding, a survey and analysis was carried out in Luanping county, using the methods of random sempling and mechanical sampling. The result shows that precipitation is the major factor that affects the seedling stand precent of Chinese pine in air-seeding.
出处
《河北林果研究》
2000年第3期232-235,共4页
Hebei Journal of Forestry and Orchard Research
关键词
降水过程
降水量
油松
成苗率
飞播造林
precipitation process
precipitation
Chinese pine
seedling rate
