引言本文描述的霜害特征是在主干(地表以上约10—30cm)形成层带出现褐斑,至下一年夏天在主干上产生不规则或椭园形小斑,在霜冻严重的情况下主干完全环死,斑痕以上部分迟早将死亡。这类伤害在日本约从1960年以来开始增加,对霜害机理的研究 INTRODUCTION The frost damage feature described here is the appearance of brown spots on the stratum of the trunk (about 10-30 cm above the earth’s surface), irregular or elliptic patches on the trunk the next summer, the complete absence of the trunk in severe frost conditions Ring dead, sooner or later the above marks will die. Such injuries have been on the rise in Japan since about 1960 and the study of frost damage mechanisms