每年开始入冬,人们都要在树干的下部刷上一层“涂白剂”,这不仅可以使环境整洁美观,更重要的是能够防治树木冻、灼伤和病虫,有利于树木安全越冬,免遭外界自然创伤.涂白剂,主要原料是石灰、食盐、硫磺和水。石灰和硫磺可以防冻、防灼,防病、杀虫;食盐有助于石灰渗入树皮,保持水分,防止石灰龟裂剥落。 Every winter, people have to brush a layer of “whitening agent” on the lower part of the tree trunk. This not only makes the environment clean and beautiful, but more importantly, it can prevent tree frost, burns and pests and diseases, Free from external natural trauma. White paint, the main raw material is lime, salt, sulfur and water. Lime and sulfur can be antifreeze, anti-burning, disease prevention, insecticide; salt helps lime infiltration bark, to maintain moisture, to prevent the lime cracked spalling.