It is cold period rearing system null of the lawn in the green of the

摘要

PURPOSE:To efficiently increase the ground temperature of a green by circulating a heating medium liquid heated with a heater through a forward passage pipe, heating pipes and a return pipe with a feed pump, radiating heat from the heating pipes and heating soil cover of the green. CONSTITUTION:A reflecting sheet 10 having many water flow holes is buried at a prescribed depth in a green and a heating medium liquid (glycols such as ethylene glycol having a low solidifying point and low specific heat) heated with a heater 18 is circulated through a forward passage pipe 14, heating pipes (20a), (20b),...(20n) and a return passage pipe 16 with a feed pump. Lawn is then planted on the surface of soil cover covering the forward passage pipe, heating pipes and return passage pipe.