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百年桐,大戟科,油桐属,落叶小乔木,是三年桐的一个变种。为我省油桐属中的稀有树种,目前仅玉山县特有。笔者从1985年起进行了三年观察,发现它具有适应性强、寿命长、抗病虫能力强、容易繁殖、产量稳定等特点。一、垂直和水平分布百年桐在玉山的地理分布是:北纬28°58’—28°84’,东经118°02’—118°48’范围。适应向阳谷地、山沟、山脚、溪旁路边,海拔350米以下的低山丘陵。玉山县童坊乡后叶村海拔180米东南向山坳里的一株百年桐,已有82年的历史,现在长势仍然旺盛,树高11.5米,冠幅9.4米,枝下高1.5米,胸径38厘米,单株产油量1 2.2市斤。官溪乡黄坳村桑园煤矿对面山,海拔210米处
Centennial trees, Euphorbiaceae, Paulownia, deciduous tree, is a variant of three years Tong. Tung oil genus rare species in our province, only Yushan unique. The author conducted a three-year observation since 1985 and found that it has the characteristics of strong adaptability, long life, strong resistance to pests and diseases, easy breeding and stable yield. First, the vertical and horizontal distribution Centenotus in Yushan geographical distribution is: latitude 28 ° 58’-28 ° 84 ’, longitude 118 ° 02’-118 ° 48’ range. Adapt to the sun valley, ravine, foot of the footbridge, creek next to the road, 350 meters below sea level hilly. Yushan County Tongfang Township posterior leaf village 180 meters above sea level south-east to Colnacone 100 years, has 82 years of history, and now the growth is still strong, the height of 11.5 meters, 9.4 meters crown, 1.5 meters high branches, diameter 38 cm, yield per plant 2.2 2.2 kg. Guanxi Township Huang Au Village opposite the mines, 210 meters above sea level