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一、引言大流量的树下喷灌装置,现已有某些生产性柑桔园用来喷水防寒。例如佛州利用Senninger pop-up型树下喷灌系统,使果园空气温度升高了0.5至1.1℃;加州用同样方法使气温上升了2.2℃。遗憾的是,喷灌后由于水分蒸发,也会使空气和树叶的温度下降。以往关于树下大流量喷灌防寒的研究报告,大多仅述及喷水后的气温变化;但有报告指出,在某些寒冻中,气温与叶温可相差1.6-2.2℃之多;至于喷灌后土壤和树干温度的变
First, the introduction of large flow under the tree sprinkler device, there are already some productive citrus orchards used to spray water cold. For example, Florida uses the Senninger pop-up tree sprinkler system to raise the air temperature in the orchard by 0.5 to 1.1 ° C. California uses the same method to increase the air temperature by 2.2 ° C. Unfortunately, the water and the evaporation of water after sprinkling can also reduce the temperature of the air and leaves. In the past, most research reports on high flow rate irrigation under trees were only based on temperature changes after water spraying. However, some reports pointed out that in some types of freezing, the difference between air temperature and leaf temperature may be as high as 1.6-2.2 ℃. For sprinkler irrigation After the soil and trunk temperature changes