Extreme-low temperature research and micro-climate zone selection for planting fruit tree in Xiapu County in winter of 2003

The study indicated that temperature inversion on fine day was evident, it became more complex owing to temperature regulation of ocean at the same time. Because of temperature inversion on fine day in brae and temperature increasing by water body, the zone was 1℃ higher than extreme-low temperature in local area, so it suited or hypo-suited for planting litchi and longan. The orchard should be selected in south, above middle part of hill, and 0.3-1.0 kilometre far from coastline, and some effective measures should be used to avoid the freeze injury in planting south subtropical fruit trees.