干旱区生态环境知识资源中心(Arid): Abiotic and biotic controls on dynamics of labile phosphorus fractions in calcareous soils under agricultural cultivation

Arid

DOI	10.1016/j.scitotenv.2019.05.091
	Abiotic and biotic controls on dynamics of labile phosphorus fractions in calcareous soils under agricultural cultivation
	Li, Feng-Rui 1,2,3; Liu, Lu-Lu 1,2,3; Liu, Ji-Liang 2; Yang, Kun 2,3
通讯作者	Li, Feng-Rui
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2019
卷号	681 页码:163-174
英文摘要	Soil labile inorganic and organic phosphorus (L-Pi and L-Po) extracted by NaHCO3 are potentially important sources of plant-available P. Their availability is strongly affected by soil physiochemical and biological properties. Here we conducted a field study in an arid region of northwestern China to investigate how L-Pi and L-Po dynamics are affected by changes in physiochemical and biological variables caused by agricultural cultivation of calcareous soils. Topsoils were sampled at multiple sites from natural calcareous grasslands and cultivated farmlands of different ages (32-40 vs. 90-100 years) that had been converted from natural grasslands. We measured L-Pi and L-Po concentrations and a set of key physiochemical (soil pH, concentrations of base cations (K+ + Na+ + Ca2+ + Mg2+), acid anions (Cl- + NO3- + SO42-), nitrate and ammonium nitrogen (N), organic carbon, and total P) and biological (soil microbial biomass carbon (C-mic), alkaline phosphatase activity (A(alp)), and abundances of soil macroinvertebrates (A(macro)) and mesoinvertebrates (A(meso))) variables. The concentration of L-Pi and L-Po was 484% and 128% higher and their proportion in the total P content was 354% and 78% higher in young farmland soils, whereas L-Pi and L-Po concentrations were 583% and 423% higher and their proportions were 353% and 240% higher in old farmland soils compared to grassland soils. Increases in L-Pi and L-Po attributable to soil P release may be driven by crucial processes of soil acidification-induced phosphate dissolution and soil biota-driven Po mineralisation. Path analyses revealed that L-Pi and L-Po dynamics were shaped by the complex interactions among five key controlling factors, soil pH, nitrate-N, A(meso), C-mic, and A(alp), involved in these crucial processes. We conclude that cultivation of calcareous soils significantly increases the availability of L-Pi and L-Po, emphasizing the importance of this land-use change as a regulator of P cycling in calcareous soils. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Calcareous soils Labile phosphorus Land-use change Soil acidification Soil biota Phosphorus release
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000469847200015
WOS关键词	LAND-USE ; NITROGEN-FERTILIZATION ; INORGANIC P ; PHOSPHATE ; ACIDIFICATION ; AVAILABILITY ; MICROORGANISMS ; FOREST ; IMPACT ; ACCUMULATION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218704
作者单位	1.Chinese Acad Sci, Linze Inland River Basin Res Stn, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China; 2.Chinese Acad Sci, Lab Ecol & Agr, Northwest Inst Eco Environm & Resources, Lanzhou 730000, Gansu, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Feng-Rui,Liu, Lu-Lu,Liu, Ji-Liang,et al. Abiotic and biotic controls on dynamics of labile phosphorus fractions in calcareous soils under agricultural cultivation[J],2019,681:163-174.
APA	Li, Feng-Rui,Liu, Lu-Lu,Liu, Ji-Liang,&Yang, Kun.(2019).Abiotic and biotic controls on dynamics of labile phosphorus fractions in calcareous soils under agricultural cultivation.SCIENCE OF THE TOTAL ENVIRONMENT,681,163-174.
MLA	Li, Feng-Rui,et al."Abiotic and biotic controls on dynamics of labile phosphorus fractions in calcareous soils under agricultural cultivation".SCIENCE OF THE TOTAL ENVIRONMENT 681(2019):163-174.