@article{Asariha_Zarabi_2023, title={Phosphorus species, fractions, and leaching risk in vermicompost-amended calcareous sandy loam soil}, url={https://oiccpress.com/international-journal-of-recycling-of-organic-waste-in-agriculture/article/phosphorus-species-fractions-and-leaching-risk-in-vermicompost-amended-calcareous-sandy-loam-soil/}, DOI={10.30486/ijrowa.2022.1947532.1390}, abstractNote={Purpose Organic matter has significant effects on phosphorus (P) retention in soil. Applying vermicompost (VC) as an organic amendment is an eco-friendly approach to increase sustainability in agriculture. There is a high potential of P loss by leaching or surface runoff from coarse-textured soils. Column leaching experiments were conducted to determine the effect of VC on P mobility in a P fertilized sandy loam soil­. Method Soil columns were amended with different VC dosages (2% VC, 3% VC, and 5% VC w/w) and leached with distilled water for 31 days. Phosphorus, base cations and anions concentration, EC, and pH were analyzed in leachates and P species, leaching rate, and fractions in amended soils were determined, too. Results The HPO4-2 and MgHPO4 (aq) were the dominant species in the leachates and their highest total concentration was observed in 5% VC-amended columns. Vermicompost increased P leaching and its leaching rate ranged from 0.41 mg kg-1day-1 for control to 0.59 mg kg-1day-1 for 5% VC-amended columns. With increasing VC dosage Res–P, NaOH–P, and KCl–P fractions decreased, but the HCl-P fraction increased. Conclusion Results indicate that the VC with increasing moderately labile P fraction (HCl-P) and HPO4 -2 and MgHPO4 (aq) species can enhance P leaching from sandy loam soil­.   Highlights Oil palm bunch ash (PBA) which is a product of the incineration of palm bunch refuse, and mycorrhizal biofertilizer could potentially help to increase the productivity of vegetable crops in the poor soils of the humid tropics. Palm bunch ash has high pH and contains essential plant nutrients such as potassium, calcium, magnesium, phosphorus and nitrogen, while mycorrhizal fungi improve soil quality, can facilitate the absorption of water beyond the root zone of crops, improve the uptake of most fixed soil nutrients such as phosphorus, zinc and manganese, and have positive effects on the growth and yield of their host plants. Cucumber grows more vigorously and produces more healthy fruits when grown on soils amended with PBA and or inoculated with mycorrhiza. }, journal={International Journal of Recycling of Organic Waste in Agriculture}, publisher={OICC Press}, author={Asariha, Mahsa and Zarabi, Mahboubeh}, year={2023}, month={Nov.}, keywords={Vermicompost, Coarse-textured soil, Leaching, Phosphorus fraction} }