油桐是我国重要的特用经济树种之一。桐油在我国工、农业生产建设中是不可缺少的物资。千年桐是我区栽培油桐的一种,主要分布于桂南。它比三年桐生长旺盛,单株产量高,结果寿命长,无枯萎病。但直播造林往往有半数以上为不结果的雄株,影响了单位面积产量。在毛主席关于“有了优良品种,即不增加劳动力、肥料,也可获得较多的收成”的教导指引下,自1965 Tung is one of the important special economic species in our country. Tung oil in our country workers, agricultural production is an indispensable material. Millennium Tong is a species of tung oil cultivation in our district, mainly distributed in Guinan. It grows stronger than the three years Tong, high yield per plant, the results of long life, no blight. However, afforestation in live broadcast often has more than half as male fruit trees, affecting the yield per unit area. Under the guidance of Chairman Mao on the guidance that “with excellent varieties, that is, without more labor and fertilizers, more crops can be obtained,” since 1965