广玉兰幼树冬季防寒技术研究

对广玉兰幼树分别设置风障、树干裹草、喷洒植物激素结合涂白3种防寒措施,观测其防护效果。结果表明:树干裹草与设置风障是对广玉兰幼树比较有效防护措施,其中树干裹草效果最好,而植物喷激素、涂白的防护效果最差。通过比较植物寒害指数,广玉兰实生幼树所表现出的抗寒能力强于其嫁接幼树。

Study on Cold-resistant Technologies of Magnolia grandiflora L.Seedlings in Winter

Three coldresisting measures such as wraping-straw on stem windbreak and spraying-mixture of lime-sulfur and lime on stem were executived on Magnolia grandiflora L.seedlings,and their protecting effects were respectively reserved and determined in this experiment.The results showed that both wraping-straw and windbreak obviously prevented these seedlings from cold stress,the latter’ s protection was the evidentest and the seedlings coated by the mixture got the most serious damage in the three measures.As for young trees of Magnolia grandi flora L.,the coldtolerance of seedlings was stronger than that of grafted ones by comparing their cold-resistant indices.