Effects of macromolecular organic acids on reducing inorganic phosphorus fixation in soil
文献类型： 外文期刊
作者： Shen, Yuwen 1 ; Ma, Zheng 1 ; Chen, Haining 2 ; Lin, Haitao 1 ; Li, Guodong 3 ; Li, Mingli 3 ; Tan, Deshui 1 ; Gao, Wensheng 3 ; Jiao, Shuying 4 ; Liu, Ping 1 ; Song, Xiaozong 1 ; Chang, Shourui 5 ;
作者机构： 1.Shandong Acad Agr Sci, Inst Agr Resources & Environm, Shandong Prov Engn Res Ctr Environm Protect Fertil, Key Lab Wastes Matrix Utilizat,Minist Agr, Jinan 250100, Peoples R China
2.Yantai Acad Agr Sci, Yantai 265500, Shandong, Peoples R China
3.Shandong Agr Dept, Fruit & Tea Tech Extens Stn, Jinan 250013, Peoples R China
4.Shandong Agr Univ, Coll Resources & Environm, Tai An 271018, Peoples R China
5.Feixian Agr & Rural Bur, Agr Technol Extens Ctr, Linyi 273400, Taian, Peoples R China
关键词： Inorganic phosphorus fixation; Fulvic acid; Polyaspartic acid; Tannic acid; Phosphorus use efficiency
期刊名称：HELIYON （ 影响因子：4.0； 五年影响因子：4.1 ）
ISSN：
年卷期： 2023 年 9 卷 4 期
页码：
收录情况： SCI
摘要： To improve the availability of inorganic phosphorus (P) in soil, we investigated the role of three macromolecular organic acids (MOAs), including fulvic acid (FA), polyaspartic acid (PA), and tannic acid (TA), in reducing the fixation of inorganic P fertilizer in the soil. AlPO4, FePO4, and Ca8H2(PO4)6.5H2O crystals were chosen as insoluble phosphate representatives in the soil to simulate the solubilization process of inorganic P by MOAs. The microstructural and physico-chemical properties of AlPO4, FePO4, and Ca8H2(PO4)6.5H2O were determined by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), and X-ray photo-electron spectroscopy (XPS) before and after treatment of MOAs. In addition, the amounts of leached P and fixed inorganic P in Inceptisols and Alfisols affected by MOAs combined with superphosphate (SP) fertilizer were determined by soil leaching experiments. The presence of the three MOAs significantly increased the concentration of leached P and reduced the contents of insoluble inorganic phosphate formed with iron, aluminum, and calcium fixed in the soil, in which PA combined with SP had the most significant effect. Furthermore, the less inorganic P fixation in the combination treatment of MOAs and SP resulted in a greater wheat yield and P uptake. Therefore, MOAs could be a synergistic material for increasing P fertilizer utilization.
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