1980—1984年间在本校卫岗果园对26个柑桔砧木实生苗进行耐寒性比较。通过田间冻害调查,测定枝条电导率,叶片的束缚水与自由水比率,进入越冬期去皮难易和测定枝叶可溶性糖的含量,越冬后枝梢T.T.C染色法,以及观测秋梢的自剪期,秋梢占整个枝梢的比率,根系分布,根冠比率等耐寒性生理指标和生物学指标的测定,从中评选出优良的耐寒砧木。 Cold-resistance of 26 citrus rootstock seedlings at Weichang Orchard from 1980 to 1984 was compared. Through field frost damage investigation, the conductivity of branches, the ratio of irreducible water and free water in leaves were measured, the peeled accessibility was difficult and the content of soluble sugar in branches and leaves was measured in winter, TTC staining of shoots after overwintering, , Autumn tip of the ratio of the entire shoots, root distribution, root and shoot ratio and other physiological indicators of cold tolerance and biological indicators of determination, selected from the excellent cold hardy stock.