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橡胶砧木对接穗的生长与产量有明显的影响,如PB5/51作砧木使接穗在开割时的茎围与可割率分别增长5％与20％,单株平均产量增长20％(与Tjirl相比)。国内测定材料认为初生代无性系侨植42—67的实生砧木的一般作用比用PB5/51、RRIM600与PB86等的较优,这是我国现有自选的一个优良砧木无性系。初生代无性系侨值42—67的实生母树表现生势旺盛与高产,其表现与国外提出选择砧木的标准“生势旺盛与高产”是一致的。笔者认为选择优良砧木的标准是:先选择生势旺盛与高产的砧木母树;后在繁育砧木苗时,选择生长优势的壮苗作砧木。为提高我国垦区橡胶生产产量与增加经济效益,今后应重视与注意选用砧木。
Rubber rootstocks had significant effects on the growth and yield of scion. For example, PB5 / 51 as rootstock increased the stems and cuttings of scion at cutting by 5% and 20%, respectively, and the average yield per plant increased by 20% (compared with Tjirl compared to). The domestic test material that the primary generation of clonal 42-67 planting rootstocks than the general use of PB5 / 51, RRIM600 and PB86 and other better, which is an optional rootstock clonal in China. The virgin mother tree of the newborn clonal overseas Chinese value of 42-67 showed strong potential and high yield. Its performance was consistent with the standard of selecting rootstocks from other countries. I believe that the criteria for selecting good rootstocks are as follows: First, select the strong and high-yielding rootstocks and mother trees; after breeding rootstocks, select the growth-dominant seedlings as rootstocks. In order to improve the output of rubber production and increase the economic benefits of reclamation area in our country, we should attach importance to and pay attention to the selection of rootstock in the future.