一、座果脐橙树花多,然而与其它甜橙品种比较座果率就相当低。Erickson等(1960)在加州研究了22年生的华脐和伏令夏橙的开花和座果。华盛顿脐橙树每株有198,693朵花蕾,而伏令夏橙为73,095朵花蕾,华脐和伏令夏橙开花前落蕾分别为48.5%和 First, the fruit Navel orange tree flowers, however, compared with other varieties of sweet orange fruit rate is quite low. Erickson et al. (1960) studied the flowering and locum of 22-year-old Chinese umbilical and volt summer orange in California. There were 198,693 flower buds per plant in Washington navel orange trees and 73,095 flower buds in summer, while the flower buds before flowering in Hua na and Vladimir flowers were 48.5% and