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1 物理法 采取一定的物理措施进行树体保护,改善果园小气候,破坏霜冻或冻害发生的条件。如:1)果园灌水,即在果树萌芽前浇水2～3次,可降低地温,推迟果树开花2～3d(天),若在萌芽后灌水可推迟3～5d(天)。2)熏烟。在夜间气温降至0℃时在
1 physical law to take certain physical measures for tree protection, orchards to improve the microclimate, destruction of frost or frost damage occurred conditions. For example: 1) Orchard irrigation, that is, watering the fruit trees 2-3 times before watering can reduce the ground temperature and delay the flowering of fruit trees by 2-3 days (days). 2) fumigation When the temperature drops to 0 ° C at night