干旱区生态环境知识资源中心(Arid): Temperature sensitivity of soil organic matter decomposition in response to land management in semi-arid rangelands of Iran

Arid

DOI	10.1016/j.catena.2019.03.043
	Temperature sensitivity of soil organic matter decomposition in response to land management in semi-arid rangelands of Iran
	Behtari, Behzad 1; Jafarian, Zeinab 1; Alikhani, Hosseinali 2
通讯作者	Jafarian, Zeinab
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2019
卷号	179 页码:210-219
英文摘要	The biotic and abiotic factors can alter the temperature sensitivity of soil organic matter (SOM) decomposition in rangeland areas. This is a key issue that directly affects soil fertility and productivity. On the other hand, most of the rangelands in Iran are involved overgrazing. However, there is a lack of information about these effects, especially, in semi-arid environments. Therefore, the aim of this study was to assess the effect of land management on soil nutrient contents and their stoichiometry on the temperature sensitivity of SOM decomposition (Q(10)) in semi-arid rangeland ecosystems. Soil samples (at three different soil depths) were collected in adjacent rangeland areas with different management in Iran. Soils were incubated at three different temperatures. The soil heterotrophic respiration was measured using an Alkali absorption method and then was calculated Q(10). The decrease in Q(10) values was observed with increasing carbon (C), nitrogen (N) and phosphorus (P) of soil content. Changes of Q(10), in relation to stoichiometry C:N and P:N showed a linear model and a second-order polynomial model in grazed and ungrazed rangeland respectively. Ungrazed rangeland had the lower Q(10) value (0.97) compared to grazed rangeland (1.21). Labile C variability at soil due to effects in land management such as trampling and erosion, altering plant biomass and microbial communities may be able to partly explained variation of Q(10) values. Overall, trend of decreasing Q(10), values associated with increasing C, N and P contents of soil in all rangeland management can be explained by the high microbial CUE. The obtained results presumably indicated that stoichiometry of C:P:N can play as an important determinant in increase CUE and decrease Q(10) in rangeland ecosystems. Overall, the results of this research will valuable for prediction of the condition and succession trend via Q(10) and C losses in various grazing management in semi-arid rangeland ecosystems.
英文关键词	Carbon quality theory Heterotrophic soil respiration Incubation Q(10)
类型	Article
语种	英语
国家	Iran
收录类别	SCI-E
WOS记录号	WOS:000468716800020
WOS关键词	NITROGEN-FERTILIZATION ; RESPIRATION RESPONSES ; CARBON DECOMPOSITION ; LOESS PLATEAU ; MICROBIAL COMMUNITIES ; QUALITY INDICATORS ; SUBSTRATE QUALITY ; GRAZING INTENSITY ; NORTHERN CHINA ; USE EFFICIENCY
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214845
作者单位	1.Sari Agr Sci & Nat Resources Univ, Fac Nat Resources, Dept Range Management, Sari, Iran; 2.Univ Tehran, Fac Agr Engn & Technol, Dept Soil Sci, Tehran, Iran
推荐引用方式 GB/T 7714	Behtari, Behzad,Jafarian, Zeinab,Alikhani, Hosseinali. Temperature sensitivity of soil organic matter decomposition in response to land management in semi-arid rangelands of Iran[J],2019,179:210-219.
APA	Behtari, Behzad,Jafarian, Zeinab,&Alikhani, Hosseinali.(2019).Temperature sensitivity of soil organic matter decomposition in response to land management in semi-arid rangelands of Iran.CATENA,179,210-219.
MLA	Behtari, Behzad,et al."Temperature sensitivity of soil organic matter decomposition in response to land management in semi-arid rangelands of Iran".CATENA 179(2019):210-219.