Abstract
Commercial production of ornamental plants in soilless substrate poses significant risk of nutrient pollution, and development of management practices to reduce N and P leaching is urgently needed. This study aims to determine if zeolite amendment reduces the leaching of nitrate nitrogen (NO3-N), ammonium nitrogen (NH4-N), and phosphorus (P) from soilless substrates incorporated with controlled-release fertilizers (CRFs). Tissue culture liners of a popular ornamental plant, peace lily (Spathiphyllum ‘Viscount’), were transplanted singly into 15-cm plastic pots containing the substrate amended with two zeolites (SC and XY), each at three rates of 10, 20, and 50 g per pot, respectively. Plants were grown in a shaded greenhouse for three months and irrigated at a 0.2 leachate fraction. Collected leachates were analyzed for NH4-N, NO3-N, and P. Results showed that both zeolites reduced N and P leaching with the 50 g per pot rate performing the best. Compared with the control, substrate amended with XY zeolite at 50 g per pot reduced NO3-N leaching by 38.34%, NH4-N leaching by 44.59%, and P leaching by 38.85%; substrate amended with SC zeolite at 50 g reduced NO3-N leaching by 52.42%, NH4-N leaching by 39.19%, and P leaching by 36.36%. Dry weights of plants grown in zeolite-amended substrates were higher than in the control substrate. This study highlights that zeolite amendment to soilless substrate is a sustainable practice for improving container plant production, while reducing N and P leaching and protecting our natural environment.
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Acknowledgements
The authors would like to thank St. Cloud Mining Co. for providing SC zeolite and Teague Mineral Products for providing XY zeolite as well as Agri-Starts, Inc. for providing Spathiphyllum ‘Viscount’ liners used in this study.
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Bo Chen: Investigation, experimental work, original draft preparation. Qibing Wang and Yuncong Li: methodology, guidance, validation, reviewing and editing. Jianjun Chen and Yongshan Wan: conceptualization, methodology, guidance, reviewing and editing.
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Chen, B., Wang, Q., Chen, J. et al. Zeolite Amendment Reduces Nitrogen and Phosphorus Leaching in Containerized Plant Production. Water Air Soil Pollut 235, 304 (2024). https://doi.org/10.1007/s11270-024-07112-6
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DOI: https://doi.org/10.1007/s11270-024-07112-6