许多柑桔类型在控制环境中试验表明茎干的耐寒锻炼已发展到不同的水平.散热现象说明,未经锻炼的茎干比经锻炼的茎干冰的扩散更为一致和迅速.一切企图抑制柑桔叶的功能导致了减缩茎干的耐寒锻炼.柑桔叶片是促进了木质部耐寒锻炼的一种主要部份. Many citrus types have been tested in controlled environments and show that cold hardiness in stems has evolved to varying degrees. The cooling phenomenon suggests that the untempered stems are more consistent and rapid than the spread of hardened stems, The function of tangerine leaves has led to the reduction of the cold hardiness of the stems, and the leaves of citrus are a major part of the xylem resistance to cold workout.