FIELD BLOWING METHOD PREVENTING GEOTHERMAL HEAT OF FIELD AND/OR HEAT RADIATION OF TEA FRUIT TREE HEAT WITH AIR CURTAIN

摘要

PROBLEM TO BE SOLVED: To provide a frost protection method intended for further improvement, in view of the fact that a conventional blowing method intended for frost protection is generally a method using a blower set on a pole, but for further expansion of frost protection effect, a new frost protection method comprising a cylindrical casing and fan is expected in a market, but is in principle an extension of a conventional frost protection.;SOLUTION: A blowing method having essential requirements of blowing to almost a whole field through blowers 2 and 20 in the field comprises preventing geothermal heat of field and/or heat radiation of tea fruit tree heat with air curtains B, B1 and B1'. The blowing method comprises performing warm air blowing which at least covers almost the whole field along the flow direction of air current and wraps whole crops of the field to secure covering with air curtains, and performing always and/or direct warm air blowing to a constant direction to eliminate geothermal heat of the field.;COPYRIGHT: (C)2007,JPO&INPIT