Amin Abu El-Eyuoon Abu Zied
Soils and Water Department, Faculty of Agriculture, Assiut University, P.O. Box: 71526, Assiut, Egypt.
Sci Rep. 2025 Aug 12;15(1):29491. doi: 10.1038/s41598-025-14997-8.
To face the current crisis in global fertilizer prices, especially in developing countries where their food security has been greatly affected, alternative sources must be found for phosphate fertilizers, whose main source is phosphate rock, which is non-renewable and subject to depletion. Therefore, this study aims to evaluate the effect of the incubation period on the availability and fractionation of phosphorus in saline sandy soil under bone char addition. About 100 g of soil was placed in an airtight plastic jar and mixed thoroughly by adding 0.4 g of bone char. This experiment was incubated for 7, 16, 35, 65, and 84 days. The results obtained from this study revealed a significant increase (p ≤ 0.01) in available phosphorus with applying bone char in saline soil after 7, 16, and 35 days of incubation compared to the initial soil (before the incubation and unamended). Relative to the initial soil, the concentration of available phosphorus increased by 33.7%, 19.5%, and 12.3% after 7, 16, and 35 days, respectively. The results showed that increasing the incubation time significantly decreased phosphorus availability in saline soil after bone char application. The NaHCO-Pi, HCl-Pi, and Res-Pi fractions increased significantly with the addition of bone char to the soil under study at all incubation periods compared to the initial soil. Inorganic phosphorus fractions after bone char application to saline sandy soil followed the order of HCl-Pi > Res-P > NaHCO3-Pi > NaOH-Pi > NHCl-Pi. In this context, these findings concluded that bone char amendment could be a potential P-source for agriculture in saline sandy soils to confront the high prices of phosphate fertilizers.
面对当前全球肥料价格危机，尤其是在粮食安全受到极大影响的发展中国家，必须找到磷肥的替代来源，磷肥的主要来源是磷矿石，而磷矿石是不可再生且会枯竭的。因此，本研究旨在评估在添加骨炭的情况下，培养期对盐渍砂土中磷的有效性和形态分布的影响。将约100克土壤放入密封的塑料罐中，并加入0.4克骨炭充分混合。本实验培养7、16、35、65和84天。本研究获得的结果表明，与初始土壤（培养前未改良）相比，在盐渍土中添加骨炭培养7、16和35天后，有效磷显著增加（p≤0.01）。相对于初始土壤，培养7、16和35天后有效磷浓度分别增加了33.7%、19.5%和12.3%。结果表明，增加培养时间会显著降低添加骨炭后盐渍土中磷的有效性。与初始土壤相比，在所研究的所有培养期内，向土壤中添加骨炭后，NaHCO-Pi、HCl-Pi和Res-Pi组分均显著增加。在盐渍砂土中添加骨炭后，无机磷组分的顺序为HCl-Pi＞Res-P＞NaHCO3-Pi＞NaOH-Pi＞NHCl-Pi。在此背景下，这些研究结果得出结论，骨炭改良剂可能是盐渍砂土农业中应对磷肥高价的潜在磷源。
