前言随着柑桔生产成本的提高,为了在建园初期就获得最高利润,必须采用高密栽植方法。然而密植树采用乔化砧,在栽植后10年左右,由于对光、土壤,水分和营养的竞争,通常会导致单位面积产量下降(Boswell等,1970)。光穿透性差也会延缓果实成熟和果皮着色,减少维C含量和果实体积。在高度密植的果园,定植不到10年,管理就可能困难 Preface With the increase of the cost of citrus production, in order to obtain the highest profit in the early days of the park, we must adopt the high-density planting method. However, the densely populated trees use Qiao anvil, which typically results in a decrease in yield per unit area due to competition for light, soil, moisture and nutrients 10 years after planting (Boswell et al., 1970). Poor light penetration also delays fruit ripening and peel coloring, reducing vitamin C content and fruit volume. In highly enclosed orchards, planting less than 10 years, management can be difficult