一、改接良种 从选定良种结果树上直接选取枝条健壮、芽体饱满、枝龄两年生带短果枝的接穗.3月中、下旬对实生老树或呈半野生状态的银杏树枝接,一般采用劈接式插皮枝接,高接改换良种,增产效果十分显著。对20余年生的雄性银杏树,通过高接良种,3年能开花结果,对低产银杏树采用高接换冠多头枝接技术嫁接良种银杏,也能取得效果。 二、巧施花粉和高接雄株 巧施花粉应把握好四个环节:①注意花期观查,适时采集花粉,当雄花序由青转淡 First, then the elite varieties selected from the tree directly selected branches robust, bud full, biennial with short branches of the scion .In March, the end of the tree or semi-wild state of ginkgo tree branches, Split-type cuttings are generally used to connect the branches, high access to improved varieties, the yield effect is very significant. For 20-year-old male ginkgo trees, high yielding ginkgo trees can be obtained by grafting high-yielding seeds for three years and grafting elite ginkgo trees with low-yielding ginkgo trees by grafting. Second, clever pollination and pollination of male pollination should take good care of four aspects of pollen: ① pay attention to flowering check, timely collection of pollen, when the male inflorescences turn pale from green