Abstract An experiment was conducted to assess the phosphorus fixation capacity in five soils orders with contrasting characteristics at different concentration of added phosphorus. The surface soil (0-15cm) samples were collected from five soil orders namely Alfisols, Inceptisols, Vertisols, Aridisols and Entisols of different locations of India. The collected soil samples were analyzed for physico-chemical properties and phosphorus fixing capacity. The initial soils samples were acidic (5.77) to alkaline (8.53) in reaction, high organic carbon content and low to medium available phosphorus with presence of 663 ppm to 1669 ppm active iron. The maximum phosphorus fixation (%) was observed in Alfisols (88.68) followed by Inceptisols (68.73), Entisols (68.33), Vertisols (66.84) and Aridisols (58.24). About 58-89% of added phosphorus was fixed in the soils and the maximum fixation was in the Alfisols while the least fixation was observed in Aridisols. Alfisols soil showing higher phosphorus fixing capacity might be due to presence of sesquioxide (active iron and aluminum oxides) that complex with phosphate ions. Phosphorus fixation capacity was negative and significant correlated (r = − 0.76*) with soil pH and positively correlated with active iron (r = 0.84*). Multiple regression analysis revealed that 85 percent of phosphorus fixing capacity of soil depends on soil pH, organic carbon, clay and active iron. Under such condition, it must be overcome by application of phosphorus on the basis of cropping sequence instead of individual crop needs to be taken into consideration and use of otherphosphorus sources such as Phosphorus bio-fertilizers, organic manures, and low grade rock phosphates for improving phosphorus use efficiency.

中文翻译：

---

印度不同土壤等级固磷能力评价

摘要 通过试验研究了不同磷添加浓度下具有不同特征的五个土壤的固磷能力。表层土壤（0-15cm）样品采集自印度不同地区的五个土壤目，即 Alfisols、Inceptisols、Vertisols、Aridisols 和 Entisols。对收集的土壤样品进行理化性质和固磷能力分析。初始土壤样品反应呈酸性 (5.77) 至碱性 (8.53)，有机碳含量高，有效磷含量低至中等，活性铁含量为 663 ppm 至 1669 ppm。在 Alfisols (88.68) 中观察到最大的磷固定 (%)，其次是 Inceptisol (68.73)、Entisols (68.33)、Vertisols (66.84) 和 Aridisols (58.24)。大约 58-89% 的添加磷被固定在土壤中，最大的固定在 Alfisols 中，而在 Aridisols 中观察到的固定最少。Alfisols 土壤显示出较高的固磷能力可能是由于存在与磷酸根离子复合的倍半氧化物（活性铁和铝氧化物）。固磷能力与土壤 pH 呈负相关且显着相关 (r = − 0.76*)，与活性铁呈正相关 (r = 0.84*)。多元回归分析表明，土壤85%的固磷能力取决于土壤pH值、有机碳、粘土和活性铁。在这种情况下，必须按种植顺序施磷来克服，而不能考虑个别作物，并使用其他磷源，如磷生物肥，