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对远离校株的83株结果大树进行了人工授粉试验。方法是：干4月22～28日（日均气温18C以上），大部分花序由青转黄、花粉囊尚未开裂时，采集雄花序，然后摊放在白纸上，置20C左右的通风干燥室内晾干，每天翻动2～3次，经2～3天花药便自然开裂散出花粉，用细筛剔除花梗等杂质，装
Eighty-three tree trees far away from the school were pollinated with artificial pollination. Method is: dry April 22 ~ 28 (average daily temperature above 18C), most of the inflorescence from green to yellow, pollen sac has not yet cracked, collecting male inflorescence, and then spread on white paper, set about 20C of ventilation and drying Indoor drying, turning 2 to 3 times a day, after 2 to 3 days of natural pollens will be pollen pollination, with fine sieve to remove impurities such as pedicle