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天津是一个工业集中、人口密集的大城市,市区有近四百万人口。蔬菜是人民生活中不可缺少的食品,发展蔬菜生产对保障城市供应具有极其重要的意义。为探讨防止菜园土壤污染、快速培肥稳产高产菜田的途径,我们于1983年开展了对
Tianjin is an industrialized and densely populated metropolitan area with nearly 4 million urban population. Vegetables are indispensable food for people’s life. Developing vegetable production is extremely important for ensuring urban supply. In order to explore ways to prevent soil pollution in the vegetable garden and to cultivate high-yielding and high-yielding vegetable fields quickly, we conducted a study in 1983