推荐回答（2个）
刚投产的树一般营养生长较旺，需要环割来保果壮果。环割时间视结果量而定，如果花量不多，则应在盛花期环割；如花量较多，则应在落花后环割。环割暂时阻断了树体有机物质往根系运输，增加了小果的营养供应，可起到保果的作用。但是，当进入第2次生理落果时，环割后的愈伤组织已恢复正常，阻止有机物向下运输的作用已明显减弱，故生长较旺的树宜在5月下旬至6月初再环割1刀。但是否需要进一步环割，要视体的挂果情况灵活掌握。如果5月中下旬植株小果转绿正常，且挂果很多，则不需要二次环割。植物生长调节剂的应用用于保果壮果的植物生长调剂剂种类较多，如：920、2，4-D、芸薹素内酯等。在生产上，一定要谨慎小心，了解产地和使用方法后方可使用。沙糖桔保果壮果可在谢花后用，920，010-50毫升/升喷施，每7-10天1次，共2-3次。另外，在新梢老熟后，可用2，4-D10-30毫升/升保果，喷施2次。病虫害防治及时防治病虫害是沙糖桔保花保果的重要措施，如有疏忽，将会造成严重落果和生成残次果。在果实发育期，应加强对红蜘蛛、溃疡病、炭疽病等的防治。
疏梢控梢疏梢是指沙糖桔在现蕾和落花后，采用人工摘除的办法，摘除相当多的营养春梢和落花的无果营养枝，以减少春梢伸长和转绿时浪费树体的营养物质。树梢时不宜全部摘完，留少量待一定的时候放秋梢用。控梢是指结果树在5月中旬至6月下旬生理落果期间抽发的夏梢，通过人工抹芽控梢的方法抹除，达到减少养分消耗、有效地防止落果的目的的技术措施。在控梢工作中，劳动力充足、肥水条件好的可以考虑放1次夏梢。放梢应选择在6月下旬至7月初进行。如果放得早，则会影响落果；放得迟，又会影响秋梢的抽生。在放夏梢期间，要增加肥水的施用和加强新梢病虫害的防治。据观察，放1次夏梢，尤其是初挂果的植株，有利于果实防日灼和健壮秋梢的抽生。定期摇花在华南地区，早春雨水较多，往往沙糖桔开花后的花瓣和花丝粘附在小果上，影响小果的光合作用。通过定期摇花，增加小果接受光照和减少病虫害的滋生，能促进果园立体结果。摇花一般从盛花开始，每5-7天摇花1次，保果效果很好。
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