关键词: 贴地层逆温, 特征分析, 果树嫁接, 避冻

Abstract: Annual extreme minimum temperature in Fujian Province mostly resulted from dropping in temperature(A Model Dropping) arisen from terrestrial radiation in fine nights after dropping in temperature arisen from advection.The serious or most serious freezing damage of fruit tree appeared in A Model Dropping.At the top,bottom and middle of slope in two locations,the investigation on the minimum temperature in air layer 0～1.5m near ground showed that the temperature inversion also appeared in air layer 0～1.5m near ground,when A Model Dropping happened.Intensity of temperature inversion in air layer developed,when relatively sloping location rose and reduced by ratio of release to influx reduced.Applying character of temperature inversion and using freeze endured variety as rootstock in air layer of the minimum temperature in grafting would evade or reduce freezing damage arisen from the minimum temperature.But the phenomena of temperature inversion in air layer 0～1.5m near ground in the bottom of the slope(cold lake) where the cold air went into easily and out difficultly,was not obvious.There was no significant effect in reducing freezing damage even by grafting.

Key words: Temperature inversion in air layer near ground, Temperature inversion in air layer near ground, Analysis of characteristics, Grafting, Freezing damage evading