It can be infered fromthe experimental results that,among the 6 citrus species,sour orange is thehighest in heat-tolerance,lemon next,poncirus and ichang papeda areweaker in heat-tolerance.

• 本试验所测定的6种柑桔中；以酸橙较为耐热；柠檬次之；枳壳、宜昌橙较不耐热.