在柑桔大冻害的年份，由于柑园微域环境不同，冻害程度也各不相同。观察了１９９１年１２月２８一３０日连续３ｄ的降雪严寒侵袭下（最低温为一７．７℃）柑桔园的冻害程度，发现：①桔水比（柑桔园面积：水域面积）２：１、风力１一１．５级时，柑桔冻害最轻；②桔水比１．５：１、风力３一５级时，冻害最重；③桔水比１．４３：１、风力２一３级时，冻害则介于上述两者之间。 In the years of citrus damaging, due to the different environment of citrus orchards, the degree of frost damage is also different. The degrees of frost damage of citrus orchards under the severe snowfall (minimum temperature of 7.7 ℃) on December 28 to December 30, 1991 were observed. The results showed that: ① ratio of citrus to water (citrus orchard area: water area) 2 : 1, when the wind power is between 1 and 1.5, citrus frost damage is the lightest; 2) when the ratio of orange water to water is 1.5: 1 and the wind power is 3 to 5, 2 a 3, frost damage is between the two.