关键词: 小麦, 小麦, 丰产稳产性, 长江中下游

Abstract: The study aims to scientifically understand the effect of freezing injury on apple in Luochuan, reduce the loss of florescence due to freezing injury, and improve the planting benefit. Based on the climate data (1955- 2014) in Luochuan County, the author analyzed the climate characteristics of apple blossom freezing injury and discussed the adopted frost prevention measures, and compared apple blossom freezing injury indexes. The results showed that the freezing injury occurred basically once in 3 years, and serious disaster occurred once in 7 to 8 years from 1955 to 2014 in Luochuan County. The emergence time mainly concentrated in April 6 to 18, making up 93% of the total times, mainly influenced flower bud. Light freezing accounted for around 2/3 of the total freezing occurrence number. Since 2000, due to climate warming, the occurrence of freezing weather increased, the large scale of temperature drop and early flowering resulted in heavy losses. Therefore, single frost prevention method could be used to prevent freeze injury in light freezing weather process, while comprehensive measures should be taken in the occurrence of serious freezing injury because complex weather condition might lower the prevention effect.