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对福建省山地红壤磷素资源进行了研究,结果表明:福建山地红壤磷素主要由无机磷组成,无机磷组成以闭蓄态磷(O-P)含量最高,其次为磷酸铁磷(Fe-P),再其次为磷酸铝磷(Al-P);有机磷组成比例大小为中等活性有机磷>中等稳定性有机磷>高稳定性有机磷>活性有机磷。随着纬度(北纬)的降低,山地红壤的闭蓄态磷(O-P)含量占全磷含量比例的平均值增加,而Fe-P、Al-P则减少;随着纬度的降低,山地红壤有机磷占全磷的比重以及绝对量均逐渐降低,土壤有效磷含量以及活性有机磷和中等活性有机磷比例呈逐步下降趋势,中等稳定和高稳定有机磷呈逐步升高趋势。土壤各无机磷组分的含量与有机质含量、pH值、阳离子交换量存在负相关,土壤有机磷的含量与有机质含量、阳离子交换量呈极其显著的正相关。土壤有机磷组分与有效磷相关密切的顺序为:活性有机磷>中等活性有机磷>中等稳定性有机磷>高稳定性有机磷;O-P与有效磷呈极其显著的负相关,Al-P和Fe-P与有效磷正相关,但未达显著程度。
The results showed that phosphorus was mainly composed of inorganic phosphorus in the red soil of mountainous areas in Fujian Province, and inorganic phosphorus was the highest in closed-state phosphorus (OP), followed by iron phosphate (Fe-P) , Followed by Al-P. The proportions of organic phosphorus were moderately active organic phosphorus> moderately stable organic phosphorus> highly stable organic phosphorus> reactive organic phosphorus. With the decrease of latitude (latitude), the average content of closed-planted phosphorus (P) in total P in mountain red soil increased while that of Fe-P and Al-P decreased. With the decrease of latitude, The proportion of P to total P and the absolute amount of P decreased gradually. The content of soil available P and the proportion of active organic phosphorus and moderately active organic P decreased gradually. The medium stable and high stable organic P increased gradually. The content of inorganic phosphorus in soil was negatively correlated with the content of organic matter, pH and cation exchange capacity. The content of organic phosphorus in soil was positively correlated with organic matter content and cation exchange capacity. The order of soil organic phosphorus and available phosphorus were as follows: active organic phosphorus> medium active organic phosphorus> medium stable organic phosphorus> high stable organic phosphorus. OP and available phosphorus had extremely significant negative correlation, while Al-P and Fe-P was positively correlated with available phosphorus but not significant.