四季柚环剥促花保果技术四季柚幼树具有旺长特性，若幼树阶段长期偏施氮肥和管理不善，易造成树冠枝叶稠密，不结果或少结果。我场对徒长空怀树进行了环剥促花试验。１９９３年１０月１７日对一株８年生无花旺长树进行环剥，翌年株产四季柚８６个，产量９５ｋｇ。１９９５... Four grapefruit ring to promote flower and fruit preservation technology Four grapefruit young tree has a long character, if the young tree stage long-term nitrogen fertilizer and poor management, can easily lead to crown dense branches, no result or less results. My field of Akira sky Huai tree girdling flowers test. On October 17, 1993, an 8-year-old flowerless tree was girdled, and 86 plants of Siji grapefruit were produced the following year with a yield of 95kg. 1995 ...