[苏《知识就是力量》杂志1980年第12期报道]西德不来梅市绿化队研究出给树木注射肥料的一种方法,即用针向树干注入树木生长和发育所必需的肥料溶液。不来梅市的科学家还发现一种意外的现象:注射后树木长出了新根。专家们认为,这说明首先是根部缺乏营养汁。利用这一新方法可挽救大城市罹病的街道树。 [Su “Knowledge is power” magazine, December 12, 1980] The Bremen team in Bremen, West Germany, developed a method of injecting fertilizers into trees that uses needle-oriented tree trunks to infuse fertilizer solutions necessary for the growth and development of trees. Bremen City scientists also found an unexpected phenomenon: the trees grow new roots after injection. Experts believe that this shows the first is the lack of nutrient juice at the root. Take advantage of this new approach to salvage a street tree in a big city.