论文部分内容阅读
华北落叶松是我国特有树种,天然分布在山西中、北部和河北北部海拔1,600-2,700米的较高山地。它具有生长快、材质好、耐腐性强等特点,为优良的建筑和桥梁用材,是华北高海拔地区主要造林树种之一。在毛主席革命教育路线指引下,我们走出校门,到生产第一线实行开门办学,向工人和贫下中农学习,根据当前落叶松育苗中的问题,在朔县薛家庄林场进行调查研究。
Larix principis-rupprechtii is endemic to China. It is naturally found in the high mountains of 1,600-2,700 meters above sea level in northern, central and northern Hebei and Hebei. It has the characteristics of fast growing, good material and strong corrosion resistance. It is one of the main afforestation species in northern China at high altitude. Under the guidance of Chairman Mao’s revolutionary education, we stepped out of our school gate to the front line of production to open the door for schools and to learn from workers and poor and middle peasants. Based on the current problems of larch seedling raising, we conducted a survey in Xuejiazhuang Forestry Farm in Shuo County.