橡胶树经过30~40年割胶后,产量会降到一个很不经济的水平,这时应当进行更新种植。1、橡胶树更新的参考标准是1)林段产量低于当地平均产量的60%。2)有效割株不足每亩15株或少于定植株数的50%。2、更新前的强割1)增加割线 Rubber trees after 30 to 40 years after tapping, the output will be reduced to a very uneconomical level, then should be updated planting. 1, The reference standard for rubber tree renewal is 1) The yield in the forest section is lower than 60% of the local average output. 2) Less than 15 effective plants or less than 50% of the planted plants. 2, before the strong cut 1) increase secant