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一、前言 磷肥是土壤肥力三要素中较复杂的问题。目前东北地区对于磷肥效果和如何加速土壤中磷素释放问题,正迫待解决;尤其在深耕密植的措施下,磷肥需要量必随之而增加,倘施之得当,可达巧施的功效,反之将引起大量磷肥被土壤本身物质所固定,不能为作物生长所利用。本文的目的,意图从土壤磷酸吸附研究,来联系耕作与施肥,找出理论依据。然而,必须指出,研究耕作施肥应与作物生长发育密切联系起来,才是有实践意义。从另一方面来说,土壤的磷酸吸附问题是土壤基本性质的一部分,也是必要予先了解的问题之一,所以在实验室内研究是必不可少的工作。
I. Introduction Phosphate fertilizer is a more complicated issue in the three elements of soil fertility. At present, the problem of phosphate fertilizer in the northeast China and how to speed up the release of phosphorus in the soil are awaiting solution. In particular, under intensive cultivation, the need for phosphate fertilizer will surely increase. If it is properly applied, On the contrary will cause a large number of phosphate fertilizer is fixed by the soil itself, can not be used for crop growth. The purpose of this article, intent on the study of phosphate adsorption from the soil, to contact farming and fertilization, to find the theoretical basis. However, it must be pointed out that it is of practical significance to study the relationship between tillage and fertilization and crop growth and development. On the other hand, the issue of phosphoric acid adsorption in soils is part of the basic nature of the soil and one of the necessary issues to be understood. Therefore, it is an indispensable task to study in the laboratory.