过去的 1999年 ,我省柑桔取得了空前大丰收 ,树体的营养与水分消耗很大 ,加上采收前后干旱无雨 ,又遇岁末的辐射降温 ,造成大范围的干冻 ,普遍出现落叶枯梢现象 ,坡下低洼园尤为严重 ,给 2 0 0 0年的座果带来了很大影响 ;位处坡腰以上的果园受下沉冷空气影响较小 ,落叶情况不甚 In the past, in 1999, citrus harvest in our province was unprecedentedly bumper harvest. The nutrition and water consumption of the tree body was very large. Before and after the harvest, the rain without rain and the radiation at the end of the year cooled down, resulting in a wide range of freeze-drying and widespread The phenomenon of deciduous leaves and shrubs appeared, especially in the low-lying area under the slope, which had a great impact on the fruit in 2000. The orchard above the slope was less affected by the submerged cold air and the leaves were not in a good condition