本研究供试土样31种,用磷酸吸收系数(PAC)作为土壤吸磷强度的指标,并探讨与土壤供磷特性的关系。结果表明,酸性红壤吸磷强度普遍较高,但随着熟化度的提高而明显下降。吸磷强度与粘粒和有机质含量呈极显著正相关,而土壤pH与其相关不明显,但对于一种土壤来说,pH与吸磷强度呈正相关。磷肥回收率与土壤PAC呈极显著负相关(r=-0.694~(**))。因此,磷肥的分配和施用不仅要考虑土壤有效磷的高低,还应考虑土壤PAC。 In this study, 31 species of soil samples were tested. The phosphorus uptake coefficient (PAC) was used as an index of phosphorus uptake in soil and the relationship with soil phosphorus supply was studied. The results showed that the phosphorus uptake intensity of acid red soil was generally high, but obviously decreased with the increase of the degree of maturation. There was a significant positive correlation between phosphorus uptake and clay and organic matter content, but no significant correlation between soil pH and pH. However, for one soil, pH and phosphorus uptake were positively correlated. Phosphate fertilizer recovery and soil PAC showed a very significant negative correlation (r = -0.694 ~ (**)). Therefore, the allocation and application of phosphate fertilizer should not only consider the level of soil available phosphorus, PAC should also consider the soil.