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以肥料与土壤接触的肥际为切入点,通过土柱培养实验,研究磷酸二铵在石灰性潮土肥际各形态无机磷的转化、含量、分布及肥料磷的迁移。旨在探讨磷酸二铵在石灰性土壤中的转化特性及肥料磷的固定机制,揭示此类土壤中磷肥有效性的主要限制因素,为磷肥合理施用和高效磷肥的研制提供理论支持。
Fertilizers and soil contact with the fertilizer as the starting point, by soil column culture experiments to study the conversion of diammonium phosphate fertilizer in calcareous tidal soil of various forms of inorganic phosphorus, content, distribution and fertilizer phosphorus migration. The purpose is to explore the conversion characteristics of DAP in calcareous soil and the immobilization mechanism of fertilizer P, reveal the main limiting factors of P fertility in such soil, and provide theoretical support for the rational application of P fertilizer and the development of P efficient fertilizer.