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我县油桐栽培历史悠久,在长期自然选择和人工选择的共同作用下,导致油桐历代分化,形成了桐林类型、品种混杂,桐株之间结实量差异大。由于长期以来,管理粗放,改造更新工作跟不上,造成老弱残林多,产量低而不稳,一般平均亩产桐油7～12斤左右。为了挖掘老桐林的增产潜力,提高产量,探索老桐林改造更新的方法,我们的设想如下:
Tung tung cultivation in our county has a long history, under the combined effect of long-term natural selection and manual selection, the differentiation of tung oil trees has been led to the formation of the Tonglin type and the varieties are mixed. The tillage between tung strains is quite different. For a long time, extensive management, renovation and updating work can not keep up, resulting in the old and the weak residual forest, low and unstable output, the average yield of tung oil about 7 to 12 pounds. In order to tap the growth potential of Laotonglin, increase production and explore the method of transformation and regeneration of Laotonglin, our tentative plan is as follows: