Characteristics of organic phosphorus fractions in soil from water-level fluctuation zone by solution 31P-nuclear magnetic resonance and enzymatic hydrolysis

doi:10.1016/j.envpol.2019.113209

	Characteristics of organic phosphorus fractions in soil from water-level fluctuation zone by solution 31P-nuclear magnetic resonance and enzymatic hydrolysis
	Qu, Ying 2; Wang, Chao 2; Guo, Jinsong 2; Huang, Junjie 2; Fang, Fang 2; Xiao, Yan 1; Ouyang, Wenjuan 1; Lu, Lunhui 1
刊名	Environmental Pollution
	2019
卷号	255
ISSN号	02697491
DOI	10.1016/j.envpol.2019.113209
英文摘要	Phosphorus (P) is an essential nutrient element for biological growth that can contribute to eutrophication in aquatic ecosystems. Water trophic status and algae growth are primarily related to the content of bioavailable P, which is primarily related to enzymatically hydrolysable organic P(EHOP) and dissolved inorganic P(IP). In this study, soil samples from the water-level fluctuation zone (WLFZ) were collected from a tributary of the Three Gorges Reservoir (TGR) to characterize the properties of organic P(OP) fractions using solution 31P-nuclear magnetic resonance (NMR) and enzymatic hydrolysis. 31P-NMR showed that orthophosphate was the main part of the bioavailable P in the WLFZ soil and accounted for 80.4% of the NaOH-EDTA extractable total P (NaOH-EDTA TP), while phosphate monoester accounted for 60.5% of NaOH-EDTA extractable OP (NaOH-EDTA OP). The soil properties and replenishment from the mainstream of the Yangtze River to the Pengxi River have a certain effect on the content and distribution of P forms in the WLFZ soil of the tributary. The EHOP accounted for 28.1% of the NaOH-EDTA OP, and a significant positive correlation was observed between labile monoester P and EHOP and organic matter (OM). The water-soluble OP(H2O-OP), bicarbonate-extractable OP(NaHCO3-OP), and Fe- and Al-associated OP(Fe/Al-OP) were significantly hydrolyzed by phosphatase and thus exhibited great release potential. The ranking of the bioavailability of OP was Fe/Al-OP > H2O-OP > NaHCO3-OP. Phytate-like P were mainly found in H2O-OP and NaHCO3-OP, which indicated that periodic submersion–emersion cycles promoted the release of phytate-like P from Fe/Al-OP into the water column of the TGR. These observations suggest that when the external P input was effectively controlled, a huge risk of release of the internal OP from the WLFZ soil, and the biogeochemical cycling of the bioavailable P played an important role in maintaining the eutrophication of the reservoir. © 2019 Elsevier Ltd
电子版国际标准刊号	18736424
语种	英语
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/9828]
专题	中国科学院重庆绿色智能技术研究院
作者单位	1.CAS Key Laboratory of Reservoir Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China 2.Key Laboratory of the Three Gorges Reservoir Region's EcoEnvironments of MOE, Chongqing University, Chongqing; 400045, China;
推荐引用方式 GB/T 7714	Qu, Ying,Wang, Chao,Guo, Jinsong,et al. Characteristics of organic phosphorus fractions in soil from water-level fluctuation zone by solution 31P-nuclear magnetic resonance and enzymatic hydrolysis[J]. Environmental Pollution,2019,255.
APA	Qu, Ying.,Wang, Chao.,Guo, Jinsong.,Huang, Junjie.,Fang, Fang.,...&Lu, Lunhui.(2019).Characteristics of organic phosphorus fractions in soil from water-level fluctuation zone by solution 31P-nuclear magnetic resonance and enzymatic hydrolysis.Environmental Pollution,255.
MLA	Qu, Ying,et al."Characteristics of organic phosphorus fractions in soil from water-level fluctuation zone by solution 31P-nuclear magnetic resonance and enzymatic hydrolysis".Environmental Pollution 255(2019).