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一、 植物营养为近百余年来注意研究的问题。1800年出现了植物营养与土壤肥力的腐殖质学说,1840年李比希提出植物矿质营养学说,从此以后有关植物营养问题进行了大量研究。随着近代化学和植物生理科学的进展,植物营养依靠什么物质,与周围环境条件有何关系,已有不少阐明;而且把植物营养作为自然界中物质循环的一个主要环节,既需要土壤中的无机
First, plant nutrition for nearly a hundred years pay attention to the issue of research. The humus theory of plant nutrition and soil fertility emerged in 1800. In 1840, Liebig put forward the theory of plant mineral nutrition. Since then, a great deal of researches on plant nutrition have been carried out. With the progress of modern chemistry and plant physiology, there is a lot of elucidation about the relationship between plant nutrition and the surrounding environment. And taking plant nutrition as a major part of the material circulation in nature requires that Inorganic