1987年3月,广西国营博白林场从邻县购回大批以土柠檬为砧木的红心橙苗木,分别定植于云飞、马子分场新辟果园。1988年在云飞分场发现有零星的红心橙叶脉发黄、生长缓慢的植株。1989年秋冬,上述两果园均出现叶脉发黄或全叶发黄的植株,个别株死亡。1990年春夏以后,这些植株不如正常株抽梢长叶,9—11月橙果成熟前后出现更多 In March 1987, a large number of red heart orange trees planted with soil lemon as rootstock were purchased from neighboring counties by Guangxi State-owned Bobai Forest Farm. They were planted in Yunfei and Ma Zi, respectively, to create a new orchard. In 1988 Yunfei points found scattered sporadic red heart orange vein yellow, slow-growing plants. Fall and winter of 1989, the two orchards were yellow or yellow leaves of all plants, individual strains died. After the spring and summer of 1990, these plants are not as good as the normal plant shoot long leaves, orange fruit before and after September-November mature more