Agro-meteorological Analysis and Methods of Protection Against Frost Damage

抄録

In agro-meteorological analyses of frost damage, a new device, namely, the thermal image analyzer, has been recently introduced. With the thermal image analyzer, we could confirm our results obtained by the usual meteorological observations. A new protecting method, a fog spray-freezing method, was tested and confirmed to be effective and high efficient in water consumption. When the air temperature was -1.8°C and -3.3°C, treated leaf temperature frozen with fog-particle was kept at-0.2°C under spray intensities of 0.4 and 0.6mm/hr, respectively. By comparison with the theoretical cooling capacity of the surrounding environment, this method is found to be highly efficient in water consumption because of it's high catching water ratio.