梨树年生长周期中,开花是重要的物侯期之一,花期除受品种特性,树势及花芽饱满度所制约外,对外界环境条件特别是温度因子最为敏感,常遭受低温、霜冻的危害。引起花器损伤影响座果。因此预报花期在果树育种和果树生产实践中有着重要意义。 对于花期与温度的关系,过去多有报道。日 Pear tree annual growth cycle, the flowering is one of the important Hou period, in addition to subject to species characteristics, flowering and flower bud fullness constraints, the external environmental conditions, especially the most sensitive to temperature factors, often suffer from low temperature, frost harm. Flower damage caused by the fruit. Therefore, forecast flowering in fruit tree breeding and fruit production practice is of great significance. For the flowering and temperature, in the past many reports. day