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采用Hedley磷分级方法对海南胶园5种母质15个砖红壤磷素形态进行了研究。结果表明:由于变幅较大,砂页岩、花岗岩、片麻岩、浅海沉积物和玄武岩5种母质砖红壤Resin-P含量间、NaHCO3-Pi含量间、NaOH-Pi含量间和HCl-P含量间差异均不显著。所有土壤各级磷中残余态磷含量和百分比均最高,且玄武岩发育砖红壤上残余态磷含量和百分比含量均显著高于其他4种母质砖红壤。5种母质砖红壤中浅海沉积物发育砖红壤有机磷总量最低,所有土壤有机磷占全磷百分比的平均值为14.67%;除浅海沉积物发育砖红壤外,其他4种母质发育砖红壤上有机磷均以NaOH-Po为主,其占有机磷总量百分比的平均值为83.68%。Resin-P、NaHCO3-Pi、NaOH-Pi和HCl-P 4个无机磷组分含量间显著或极显著水平正相关,且均与土壤Bray 2提取态磷呈极显著的正相关。NaHCO3-Po和NaOH-Po两个有机磷组分含量间呈极显著正相关,NaHCO3-Po、土壤有机磷总量均与土壤有机质含量呈显著正相关。
Hierarchy phosphorus content was used to study phosphorus forms in 15 red soils from five parent materials in Hainan rubber plantation. The results showed that there were no significant differences in the content of Resin-P, the content of NaHCO3-Pi, the content of NaOH-Pi and the content of HCl-P in red soil of sandstone, granite, gneiss, shallow sea sediments and basalts There was no significant difference between the contents. The content and percentages of residual phosphorus in all phosphorus fractions were the highest in all soils, and the content and percentage of residual phosphorus in the brick-making red soils of basalts were significantly higher than those of the other four kinds of parent bricks. Among the five parental brick red soils, the total amount of organic phosphorus in the brick red soil was the lowest in all the shallow marine sediments, and the average percentage of total organic phosphorus in all the soils was 14.67%. In addition to the brick red soil in shallow sea sediments, the other four parent materials developed brick red soil Organic phosphorus are mainly NaOH-Po, accounting for an average percentage of total organic phosphorus 83.68%. There was a significant positive correlation between the content of four inorganic phosphorus fractions of Resin-P, NaHCO3-Pi, NaOH-Pi and HCl-P. There was a significant positive correlation between content of NaHCO3-Po and NaOH-Po. There was a significant positive correlation between NaHCO3-Po and total content of soil organic phosphorus and soil organic matter.