Abstract: The experiment was designed for 9 frost protection treatments,including ground plastic film,canopy plastic film with traditional irrigation,spraying and smoky,taking the test without frost protection as a control.The experiment confronted with two frost weather processes on 6th April 2013(the minimum temperature was -4.7℃)and 10th April 2013(the minimum temperature was -3.1℃).The results showed that all treatments had some certain effect on keeping warm and frost prevention,especially the treatments of canopy plastic film, ground plastic film and smoky,spraying and smoky.The average minimum temperature of the canopy at 1m height was higher 1.7-3.0℃ than that of without frost protection.The lasting time of cold temperature below 0℃ decreased 6-7h.The frozen rate of peach flower reduced 25.3-68.7 percentage points.The bud was not frozen under all treatments.But the tree without frost protection measure was frozen obviously and the frozen rate was up to 33.3% and 50%.The frost disaster index of peach during flowering period has been analyzed by using this experiment and related survey data.The peach frozen rate was calculated with the statistical model under the conditions of different low temperatures and different lasting time of low temperatureThe calculation was agreement with the investigation closely.The result was helpful to selecting appropriate frost prevention measures to reduce disaster loss for peaches.

Key words: Peach, Ground plastic film, Canopy plastic film, Combination, Frost protection experiments