In order to ensure the safe wintering of jujube seedlings, the loss will be minimized to the maximum extent. For those winter jujube gardens and nursery fields that have not yet adopted and not completely adopted winter management measures, the following technical measures are emphasized:
First, physical measures
Including the application of organic fertilizer, ground frozen water and grass covering film, root and stem culture since the autumn of 2016; the trunk is white and bundled with waste newspapers, cotton wool, foam, rice straw, delayed trimming, setting the wind Screens, anti-freezing of sheds and temporary smoke-increasing measures, etc., if relevant measures are not implemented, timely replenishment and preparation of materials in advance.
Second, chemical measures
It is mainly used to spray some antifreeze (liquid) of fruit trees rich in paraffin, vegetable oil, polybutene, fulvic acid, salicylic acid, guaiacol and nutritive antifreeze substances to relieve the freezing to a certain extent. harm:
1. Brand antifreeze (liquid) such as Aussie Shengshi fruit tree antifreeze; 叁 玖 玖 plant antifreeze; Zhongnong high plant antifreeze; Donglixin plant antifreeze; Zhongwei fast live plant antifreeze;
2, the period of use: 3-5 days before the arrival of frost or cold wave, after the sudden low temperature is affected by freezing, after the snow or the cold weather, the temperature difference changes drastically, and the spring temperature gradually rises later;
3, the use of multiples: according to different brands of antifreeze requirements diluted 100-600 times evenly sprayed or smear canopy branches, even spray 3-5 times, each interval 7-10 days;
4. Note: When the freezing damage is serious, the spraying concentration should be increased or the number of spraying should be increased.