笔者根据自己所管辖的长城企业集团属下的八一稀土矿桔园低改的经验，认为深耕改士和增施磷肥是减轻柑桔高温异常落果，获得丰产稳产的基础。1．狠抓以深耕或扩穴压埋有机肥为中心的土壤管理工作。扩穴深度50～60厘米，每株桔树分层压埋杂草、垃圾肥50公斤（撒石灰0．5公斤）、 Based on the experience of the low-tech transformation of the 81 rare earth mine orange and orange garden under the jurisdiction of the Great Wall Enterprise Group under its jurisdiction, the author believes that cultivating and applying phosphate fertilizer is the basis for alleviating the abnormal fruit drop at high temperature and attaining high and stable yield. 1. Pay close attention to deep plowing or expanding pressure buried organic fertilizer as the center of soil management. Expand the depth of the hole 50 to 60 cm, each stratified embedded orange weeds, waste fertilizer 50 kg (lime 0.5 kg),