原山东农学院林学系教授、系主任程跻云先生,现年93岁,退居上海,仍关心着山东的林业事业。近日写信给山东林学会,呼吁广大林人、教育者都来宣传植树造林,保护益鸟、保护环境。本刊节录一部分并加题目刊登于此,以便于齐鲁林人了解老一辈林学家的心声。 Former Shandong Agricultural College Professor of Forestry, Department Director Mr. Cheng Jiunun, now 93 years old, relegated to Shanghai, still concerned about the forestry in Shandong. Recently wrote a letter to the Shandong Institute of Forestry, called on all forest people, educators have to promote afforestation, protecting the benefits of birds, protecting the environment. The journal excerpts a section and adds the title published here, in order to facilitate the Qilu Lin people understand the feelings of the older generation of forest scientists.