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油桐(Alertes fordii Hems)是我区主要经济林木,建国卅年来,平均每年生产桐油2150万斤,占全国的十分之一。但全区油桐生产水平仍然很低,其重要的技术原因是良莠混染,单产低,产量不稳。据1979年在万县龙驹区四个生产队的6596株,8—20年生桐树实测,平均单株产籽2.43斤;其中单株结果在100个以下的占62％,100～200果的占24％,200果以上的仅占14％,还有2％的植株不结果。单株结果量的年间变化也极显著,有3.1％的植
Tung (Alertes fordii Hems) is the main economic forest in our region. Since the founding of New China, the average annual production of tung oil is 21.5 million kilograms, accounting for one tenth of the national total. However, the production of tung oil in the whole region is still very low. The important technical reason is that it is mixed with good and bad quality, with low yield and unstable output. According to the survey of 6596 plants and 8-20 year-old Tung trees in four production teams in Longju District, Wan County in 1979, the average seedling yield per plant was 2.43 kg; among them, the results of single plants below 62% and 100-200% Accounted for 24%, only over 14% of 200 fruit, and 2% of the plants did not result. The year-by-year variation of single fruit yield was also significant with 3.1% of the plantations