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火炬松(Pinus taeda L.)引入汉中地区16年来生长良好,比马尾松树高生长大42.8%,胸径生长大57.8%,材积生长大256%,干形较直,病虫害较少,已正常开花结实,采种育成第二代苗木。
Pinus taeda L. was introduced into Hanzhong area for 16 years and grew well. It grew 42.8% higher than Pinus massoniana, its DBH grew 57.8% and its volume grew 256%. Its dry stem shape was relatively straight with fewer pests and diseases and had normal flowering and fruiting , Seed breeding into second-generation seedlings.