柑桔开花的着果率一般在2％～7％。笔者对本校园艺场20公顷桔园采取了保花保果措施,连年丰产稳产。其具体方法是:①修剪交叉枝、荫蔽枝和衰弱枝条,使树冠通风透光。②在花期对每株成年果树施尿素0.2～0.3公斤(对水沟施为好)。③控制春梢生长,只留取1/2～2/3的枝条,并且把夏梢 Citrus flowering fruit rate is generally 2% to 7%. The author of the horticultural field of 20 hectare orange garden to take measures to protect Paul fruit, Liannianfeng stable and stable production. The specific method is: ① pruning cross branches, shade branches and weak branches, so that the crown of light and light. ② In the flowering of each adult fruit tree urea 0.2 ~ 0.3 kg (good facilities for the ditch). ③ control spring shoot growth, leaving only 1/2 ~ 2/3 branches, and the summer tip