脐橙是常绿果树,但开春以后,如果频繁受寒潮侵袭,气温差异变化大,加之冬季又没有采用防冻保暖措施,就有可能造成春季大量落叶,影响脐橙树的营养积累和新梢抽发以及花芽的分化,造成树势衰弱、花而不实、坐果率极低等 Navel orange is an evergreen fruit tree, but after the spring, if frequently affected by the cold wave influx, large temperature changes, combined with the winter did not use anti-freezing measures, it is possible to cause a large number of leaves in the spring, affecting the navel orange tree nutrient accumulation and shoots aspiration and Differentiation of flower buds, resulting in weak bark, flowers and false, fruit set rate is very low