干旱区生态环境知识资源中心(Arid): Soil phosphorus pools and cycling as affected by changing land-uses in a semi-steppe ecosystem

Arid

DOI	10.1007/s10705-021-10178-x
	Soil phosphorus pools and cycling as affected by changing land-uses in a semi-steppe ecosystem
	Raiesi, Fayez; Sobhani, Sahar
通讯作者	Raiesi, F (corresponding author), Shahrekord Univ, Fac Agr, Dept Soil Sci & Engn, POB 115, Shahrekord, Iran.
来源期刊	NUTRIENT CYCLING IN AGROECOSYSTEMS
ISSN	1385-1314
EISSN	1573-0867
出版年	2022
英文摘要	Land-use changes in native rangelands can greatly affect nutrient cycling processes. While phosphorus (P) is the second most important macronutrient that limits plant growth and productivity in semi-arid rangelands, the effect of land-use conversions on P pools and turnover has been rarely studied. The main objective of this study was to determine soil P pools and dynamics after conversion of rangelands to rainfed wheat croplands and re-conversion of these rainfed farming systems back to rangelands (i.e., cultivation abandonment) in West Central Iran. Soil samples (0-150 and 150-300 mm) were collected from wheat-cultivated rangelands, wheat-abandoned rangelands and uncultivated rangelands on north-facing and south-facing slopes, and analyzed for P pools, P mineralization and phosphatase activities. Results showed a strong impact of land-use changes on soil P pools and turnover, which varied greatly with slope aspect. Converting rangelands to wheat fields declined soil inorganic P (46%), organic P (26%), microbial biomass P (52%), potentially mineralizable P (78%) and P-acquiring enzyme activities (15-20%). Conversely, abandonment of wheat cultivation resulted in a major recovery of P pools and cycling with greater inorganic P (36%) and organic P (21%) pools, microbial biomass P content (79%), P mineralization (191%) and P-cycling enzyme activities (4-7%) after 15 years. In summary, short-term cessation of wheat cultivation to allow secondary rangeland succession without disturbance would rebuild soil P storage, restore P cycling and supply, and hence would improve soil functions and quality. Therefore, cropland abandonment should be adopted to maintain soil P fertility and the sustainability of native rangelands in semi-arid regions.
英文关键词	Phosphorus fertility Phosphorus cycling Phosphatase activity Rainfed wheat Cultivation abandonment Grazing rangelands
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000716233300001
WOS关键词	MICROBIAL BIOMASS PHOSPHORUS ; ORGANIC-MATTER ; LOESS PLATEAU ; ENZYME-ACTIVITIES ; CARBON DYNAMICS ; FRACTIONS ; GRASSLAND ; NITROGEN ; WHEAT ; MINERALIZATION
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367687
作者单位	[Raiesi, Fayez; Sobhani, Sahar] Shahrekord Univ, Fac Agr, Dept Soil Sci & Engn, POB 115, Shahrekord, Iran
推荐引用方式 GB/T 7714	Raiesi, Fayez,Sobhani, Sahar. Soil phosphorus pools and cycling as affected by changing land-uses in a semi-steppe ecosystem[J],2022.
APA	Raiesi, Fayez,&Sobhani, Sahar.(2022).Soil phosphorus pools and cycling as affected by changing land-uses in a semi-steppe ecosystem.NUTRIENT CYCLING IN AGROECOSYSTEMS.
MLA	Raiesi, Fayez,et al."Soil phosphorus pools and cycling as affected by changing land-uses in a semi-steppe ecosystem".NUTRIENT CYCLING IN AGROECOSYSTEMS (2022).