板栗系异花授粉植物,其有性繁殖后代单株间产量和品质悬殊,且种性混杂,良莠不齐,低产树仅产6—8斤,果实成熟期亦不一致,甚至还有仅结刺苞不长栗子的“公树”。实行多头高接换种,接后产量可成倍增加,其高接方法如下: 1.多头高接换种法:采用枝干直径3—4 Chestnut cross-pollination of plants, their sexual reproduction offspring yield and quality differences, and the species mixed, good and bad, low-yielding tree only 6-8 kg, the fruit is not the same period of maturity, and even only prickly Chestnut’s “public tree.” The implementation of long high exchange rate, then the yield can be multiplied, the high access methods are as follows: 1. Long high exchange method: the branch diameter of 3-4