以长春城区不同地点的梓树绿地为调查对象，对其生长状况和抗低温能力进行评价。结果表明：冻害指数平均值为17．7，最高为24．1；冻害率平均值为34．7％，最高为46．0％。裸地封冻、无雪期长，加之持续低温，是造成冻害的主要原因。%Catalpa ovata G.Don was taken as objects at different sites in Changchun to estimate the growth conditions and low temperature resistance .The results indicated that average value of freeze injury index was 17.7, the highest value was 24.1; average value of freeze injury rate was 34.7&, the highest value was 46.0%.The main reasons of freeze injury were bare land frozen , long snowless stage and sustainable low -temperature.
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