Fulvic-polyphosphate composite embedded in ZnO nanorods (FA-APP@ZnO) for efficient P/Zn nutrition for peas ( L.)

A nano-fertilizer (FA-APP@ZnO) was designed and prepared based on the copolymer of fulvic acid (FA) and ammonium polyphosphate (APP) with ZnO nanorods embedded, to tackle the antagonism between phosphorus (P) and zinc (Zn) in fertilization. FA-APP@ZnO was confirmed to revert the precipitability of H...

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Published inRSC advances Vol. 12; no. 51; pp. 338 - 332
Main Authors Han, Chunxiao, Yang, Jingxu, Zhou, Xiaohou, Yun, Peng, Li, Xue, Xu, Dehua, Zhong, Yanjun, Zhong, Benhe, Yan, Zhengjuan, Wang, Xinlong
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 17.11.2022
The Royal Society of Chemistry
Subjects
Ammonium dihydrogen phosphate
Chemistry
Copolymers
Dispersion
Fertilizers
Hydrolysis
Hydroponics
Nanorods
Nutrients
Peas
Zinc oxide
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Summary:A nano-fertilizer (FA-APP@ZnO) was designed and prepared based on the copolymer of fulvic acid (FA) and ammonium polyphosphate (APP) with ZnO nanorods embedded, to tackle the antagonism between phosphorus (P) and zinc (Zn) in fertilization. FA-APP@ZnO was confirmed to revert the precipitability of H 2 PO 4 − and Zn 2+ into a synergistic performance, where FA and APP can disperse ZnO nanorods, and in return, ZnO catalyzes the hydrolysis of the absorbed APP. The hydrolysis rate constant of pyrophosphates consequently increased 8 times. The dry biomass of pea ( Pisum sativum L.) under the FA-APP@ZnO hydroponics for 7 days increased by 119%, as compared with the situation employing the conventional NH 4 H 2 PO 4 and ZnSO 4 compound fertilizer. Moreover, the uptake of seedlings for P and Zn was enhanced by 54% and 400%, respectively. The accelerated orthophosphate release due to ZnO catalysis and the well-dispersed ZnO nanorods enabled by APP met the urgent demand for P and Zn nutrients for peas, especially at their vigorous seedling stage. This work would provide a new idea for constructing nano-platforms to coordinate the incompatible P and Zn nutrients for the improvement of agronomic efficiency. Phyto-nanotechnology can improve the nutrient efficiency and alleviate the environmental stress caused by eluvial agricultural chemicals, contributing to sustainable agriculture.
Bibliography:Electronic supplementary information (ESI) available: Fig. S1: the calibration curves of ICP-OES; Fig. S2: schematic of the different growth modes of the ZnO crystals; Fig. S3: Raman spectra of FA-APP@ZnO; Fig. S4: overall reaction processes for the formation of FA-APP@ZnO; Text S1 (Table S1, Table S2, Fig. S4, and Fig. S5): hydrolysis kinetics analyses of APP; Fig. S6: DFT-calculated APP hydrolysis; Fig. S7: PL emission spectra of ZnO nanorods. See DOI
https://doi.org/10.1039/d2ra05480a
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ISSN:2046-2069
2046-2069
DOI:10.1039/d2ra05480a