为开创柑桔名牌,提高优质果比例,自1993年以来,我区将劣质柑桔高换良种1800万株,其中纽荷尔脐橙占700万株.但是,高换纽荷尔脐橙后,存在座果率低,恢复产量慢,丰产性不稳定等问题.对此,区果品办于1997年开始,在几个区县实施统一技术方案,比较几个实用的处理技术对提高纽荷尔脐橙座果率的效应.现将两年来的试验总结如下: To create a citrus brand, improve the proportion of high-quality fruit, since 1993, my area will be poor for high-quality citrus 18 million seed, of which Newhall navel oranges account for 7000000. However, high for Newhall navel, there Fruit yield is low, slow recovery yield, high yield instability and other issues.To this end, the District Office of Fruit began in 1997, in a few districts and counties to implement a unified technical program, a few more practical treatment technology to improve Newhall navel orange The effect of fruit rate is now summed up in two years as follows: