油桐一般生长至20年左右即开始逐渐衰退,结果数量减少。为了促进油润生长、增加结实量,湖南古丈县断龙山公社泽禾溪大队林(?),进行了关于老龄油桐截枝抚育的工作。抚育方法是将老树主干的2—3次分枝以上的枝条全部伐除(但每一轮枝上要留下2—3尺长的枝条。如图一)。在第二次抚育时则只保留第一次抚 Tung usually grow to 20 years or so began to gradually decline, reducing the number of results. In order to promote the growth of oil-bearing and increase the seed-setting capacity, Lin Ze (?), Zehe Creek Commune, Longshan Mountain, Guzhang County, Hunan Province, carried out the work of cutting old branches of Tung Oil Tree. The method of tending is to completely remove 2-3 branches above the trunk of the old tree (but leave 2-3 feet of branches on each branch). In the second tending only keep the first time caress