大部分果树都具有两性花,但多数是自花不实,也有些虽能自花结实,但座果率很低,若单独栽植而又不进行人工辅助授粉,产量降低,甚至会出现只开花不结果的现象,所以在建园时必须配合栽植其他品种做为主栽品种的授粉树,才能保证果树的丰产、稳产。优良的授粉树应具备以下条件:1.能适应当地的自然条件,抗寒、抗病力强;2.花期与主栽品种一致或基本一致;3.具有大量的花粉和花量,年年 Most fruit trees have bisexual flowers, but most are self-programable, while others are self-pruned, but have low fruit-setting rates. If planted alone without artificial pollination, yields are reduced and even flowering occurs Ineffective phenomenon, so in the construction of the park must be planted with other varieties as the main species of the pollination tree, in order to ensure the high yield of fruit trees, stable yield. Excellent pollination trees should have the following conditions: 1. To adapt to the local natural conditions, cold, disease resistance and strong; 2 flowering and main cultivars consistent or basically the same; 3. With a large number of pollen and flowering, annual