中文摘要：

土壤磷素形态分级方法可用于估算土壤有效磷数量、不同土壤磷组分库数量及其对土壤有效磷的补充能力。以沈阳农业大学棕壤长期定位试验土壤为供试材料，运用蒋柏藩一顾益初石灰性土壤无机磷分级测定方法、Bowman-Cole土壤有机磷分级测定方法及Hedley土壤无机有机磷联合测定修正法，进行土壤磷分级的比较研究。结果表明：蒋柏藩法是较适合于棕壤的无机磷分级体系，Hedlev修正体系较Bowman—Cole法更适用于棕壤有机磷分级，能较好的反映有机磷在土壤中存在的实际数量和质量。^31P核磁共振法测定的4种磷化合物除正磷酸双酯外，均与常规分级方法有较好的相关性；无机正磷酸盐及正磷酸单酯与有效磷呈极显著正相关，是土壤有效磷的主要来源。

英文摘要：

Phosphorous fraetionation is a method developed to estimate sizes of readily soil available P pool, and soil P sub- pools and their ability to replenish the available P pool. This article used the soils of Shenyang Agricultural University long-term fertilizer experiment in brown soil as material, used the methods of Jiang-Gu on calcareous soils, Bowman-Cole and Hedley to earriy on the comparison study of soil phosphorous fraction. Results showed that Jiang-Gu on calcareous soils was a more suitable inorganic phosphorous fractioning method for brown soils, and the methods of Hedley could better reflect the actual quantity and quality of organic phosphorus in soil, it was more suitable for brown soils than method of Bowman-Cole. The phosphorus-composition through ^31p nuclear magnetic resonance technology were all well related to conventional phosphorus classification except orthophosphate diesters, the inorganic orthophosphate and orthophosphate monoesters content had significant correlation with available P, the main source of available P in soil.