不同越冬处理方式下樟子松幼苗防冻效果分析

Analysis of Anti-freezing Effect of Pinus Sylvestris Seedlings under Different Overwintering Treatments

选择覆土、覆盖草垫、秸秆树干包扎、半涂白等几种不同的越冬处理方式对樟子松幼苗进行防冻效果分析,以不同时间阴面、阳面的温差以及昼夜极差、冻害发生情况作为指标开展调查。结果表明,本试验中选择的半涂白剂对树干进行半涂白的防冻效果最好,有利于降低阳面树干表面温度,减小昼夜温度差,进而起到降低冻害的效果。建议在北方地区樟子松幼苗越冬期间推广半涂白技术,半环形半涂白即可在降低成本的基础上起到很好的防冻效果。

Several different overwintering treatments such as soil covering,straw mulching,stalk trunk wrapping,and white coating were selected to analyze the antifreeze effect of Pinus sylvestris seedlings.The temperature difference between the shade and the sun at different times,the extreme difference between day and night,and the occurrence of frost damage.The survey was carried out as an indicator,and the results showed that the whitening agent selected in this experiment has the best antifreeze effect on whitening the trunk,which is beneficial to reduce the surface temperature of the trunk on the sun surface,diminish the temperature difference between day and night,and thereby reduce the effect of frost damage.It is suggested that the whitening technique should be promoted during the wintering period of Pinus sylvestris seedlings in northern areas.Semi-circular whitening can have a good antifreeze effect while reducing costs.