根据华南热作两院一九七八年开办四省(区)短期训练班“使用乙烯利新割制”的经验,我站于一九七九年开始,在站内选三个树位作生产性试验:第一个树位设在一九六三年定植的实生树Tjirl林区;第二个树位设在一九六三年定植的初级系比区(40个品系,多数为周内无性系);第三个树位设在一九六五年定植的肥料试验区(品系为RRIM600)。三个树位分别设对照树位。 According to the experience of two provinces (autonomous regions) short-term training courses entitled “Use of ethephon in the two systems” held by the two chambers in South China in 1978, I started from 1979 and selected three tree stations for production Sexual Testing: The first tree was in Tjirl forest, a tree planted in 1963; the second tree was in the primary plantation (19 strains, most of which was in week 1963) Clones). The third tree was set in a fertilizers pilot plant planted in 1965 (strain RRIM600). Three tree bits were set up control tree.