喷施不同药剂对苹果花抗霜冻能力的影响

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中图分类号：S661.1 文献标识码：A 文章编号：1002-2910（2025）02-0022-05

Effects of spraying different chemicals on frost resistance of apple flowers

LU Chao1， JIANG Caina²， XUE Xiaomin1* （1.Shandong InstituteofPomology/State Key Laboratory ofNutrient Useand Management，Tai'an，Shandong 271000， China; 2.College of Horticulture， China Agricultural University， Beijing l0o193， China）

Abstract： Using the flowers of Fuji apple in full bloom as experimental materials， the effects of spraying organic calcium， frost-proof agent and brassinolide on the freezing situation and cold-resistance physiological indexes of flowers were studied by artificial simulation of frost conditions. The results showed that spraying organic calcium， frost-proof agent and brassinolide could reduce the freezing rate of flowers， and spraying organic calcium was the most effective. Compared with the control， the relative conductivity of spraying organic calcium at different low temperature duration decreased and the soluble protein content increased. The proline content of spraying frost-proof agent at different low temperature duration decreased. The SOD activity of spraying brassinolide at different low temperature duration increased; The POD activity of spraying organic calcium at different low temperature duration increased. The malondialdehyde content decreased after spraying brassinolide for different duration of low temperature.

Key words： apple; florescence; frost; relative conductivity; osmoregulatory substances; protective enzyme activity

霜冻是影响中国苹果生产最主要的气象灾害之一，近年来呈现出多发频发的特点，导致部分苹果产区霜冻灾害呈加重趋势，对苹果生产危害最重的是花期霜冻。（剩余6826字）