Fertilizer Amount and Soil Properties Govern Differential Adsorption of Polyphosphate and Orthophosphate
The growing use of ammonium polyphosphate (APP) fertilizer requires an understanding of its soil transformation for sustainable phosphorus (P) management and environmental protection. This study investigated the adsorption characteristics of APP1 (two P species) and APP2 (seven P species) in six soi...
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MDPI AG
2025-03-01
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| Series: | Agriculture |
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| author | Yang Li Minghui Huang Taiyan Yuan Dehua Xu Zhengjuan Yan Xinlong Wang |
| author_facet | Yang Li Minghui Huang Taiyan Yuan Dehua Xu Zhengjuan Yan Xinlong Wang |
| author_sort | Yang Li |
| collection | DOAJ |
| description | The growing use of ammonium polyphosphate (APP) fertilizer requires an understanding of its soil transformation for sustainable phosphorus (P) management and environmental protection. This study investigated the adsorption characteristics of APP1 (two P species) and APP2 (seven P species) in six soils, comparing them with monoammonium phosphate (MAP). Results revealed that APP adsorption was greater than MAP under low P soil and/or low P addition condition, but was lower under high P soil and high P addition conditions. Generally, APP1 showed greater adsorption than APP2, except in laterite soil rich in iron (Fe) and aluminum (Al) oxides. Polyphosphates in APP, especially pyrophosphate, mainly contributed to total P adsorption and promoted the release of native orthophosphate in soil. Compared to MAP, APP’s chelation altered soil pH and released Fe, Al, and organic carbon, impacting P adsorption. Redundancy analysis indicated that Fe oxide and Olsen-P in acidic soils accounted for 54.5% of the variance in adsorption differences between APP and MAP, while pH and organic matter in calcareous soils explained 49.7%. In conclusion, the adsorption differences between APP and MAP depended on P concentration, APP’s P species distribution, and soil properties, providing valuable insights for optimal P management in sustainable agriculture. |
| format | Article |
| id | doaj-art-2806a3997a0f4a4b8b1bd90ca71f89e6 |
| institution | DOAJ |
| issn | 2077-0472 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
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| series | Agriculture |
| spelling | doaj-art-2806a3997a0f4a4b8b1bd90ca71f89e62025-08-20T02:41:48ZengMDPI AGAgriculture2077-04722025-03-0115658510.3390/agriculture15060585Fertilizer Amount and Soil Properties Govern Differential Adsorption of Polyphosphate and OrthophosphateYang Li0Minghui Huang1Taiyan Yuan2Dehua Xu3Zhengjuan Yan4Xinlong Wang5Engineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources of Ministry of Education, School of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaEngineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources of Ministry of Education, School of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaEngineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources of Ministry of Education, School of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaEngineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources of Ministry of Education, School of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaEngineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources of Ministry of Education, School of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaEngineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources of Ministry of Education, School of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaThe growing use of ammonium polyphosphate (APP) fertilizer requires an understanding of its soil transformation for sustainable phosphorus (P) management and environmental protection. This study investigated the adsorption characteristics of APP1 (two P species) and APP2 (seven P species) in six soils, comparing them with monoammonium phosphate (MAP). Results revealed that APP adsorption was greater than MAP under low P soil and/or low P addition condition, but was lower under high P soil and high P addition conditions. Generally, APP1 showed greater adsorption than APP2, except in laterite soil rich in iron (Fe) and aluminum (Al) oxides. Polyphosphates in APP, especially pyrophosphate, mainly contributed to total P adsorption and promoted the release of native orthophosphate in soil. Compared to MAP, APP’s chelation altered soil pH and released Fe, Al, and organic carbon, impacting P adsorption. Redundancy analysis indicated that Fe oxide and Olsen-P in acidic soils accounted for 54.5% of the variance in adsorption differences between APP and MAP, while pH and organic matter in calcareous soils explained 49.7%. In conclusion, the adsorption differences between APP and MAP depended on P concentration, APP’s P species distribution, and soil properties, providing valuable insights for optimal P management in sustainable agriculture.https://www.mdpi.com/2077-0472/15/6/585polyphosphateorthophosphatesoil phosphorus adsorptionphosphorus species |
| spellingShingle | Yang Li Minghui Huang Taiyan Yuan Dehua Xu Zhengjuan Yan Xinlong Wang Fertilizer Amount and Soil Properties Govern Differential Adsorption of Polyphosphate and Orthophosphate Agriculture polyphosphate orthophosphate soil phosphorus adsorption phosphorus species |
| title | Fertilizer Amount and Soil Properties Govern Differential Adsorption of Polyphosphate and Orthophosphate |
| title_full | Fertilizer Amount and Soil Properties Govern Differential Adsorption of Polyphosphate and Orthophosphate |
| title_fullStr | Fertilizer Amount and Soil Properties Govern Differential Adsorption of Polyphosphate and Orthophosphate |
| title_full_unstemmed | Fertilizer Amount and Soil Properties Govern Differential Adsorption of Polyphosphate and Orthophosphate |
| title_short | Fertilizer Amount and Soil Properties Govern Differential Adsorption of Polyphosphate and Orthophosphate |
| title_sort | fertilizer amount and soil properties govern differential adsorption of polyphosphate and orthophosphate |
| topic | polyphosphate orthophosphate soil phosphorus adsorption phosphorus species |
| url | https://www.mdpi.com/2077-0472/15/6/585 |
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