干旱区生态环境知识资源中心(Arid): Microbial nutrient limitation in rhizosphere soils of different food crop families: Evidence from ecoenzymatic stoichiometry

Arid

DOI	10.1002/ldr.4513
	Microbial nutrient limitation in rhizosphere soils of different food crop families: Evidence from ecoenzymatic stoichiometry
	Wang, Xuelian; Gong, Xiangwei; Li, Xiangyu; Sun, Sitong; Dang, Ke; Feng, Baili
通讯作者	Gong, XW
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2023
卷号	34 期号:4 页码:1019-1034
英文摘要	Microbial metabolism directly participates in soil nutrient recycling and ecosystem stability. Although the rhizosphere soil is one of the most active habitats, information on how microorganisms acquire nutrients based on ecoenzymatic stoichiometry is lacking, especially for major food crops under field conditions. Thus, this study aimed to explore the soil nutrient properties and microbial biomass concentrations as well as extracellular enzymatic activities and focused on carbon (C), nitrogen (N), and phosphorus (P) cycling of different crop types, including potato (Solanaceae), maize (cereal), soybean (Leguminosae), and buckwheat (Polygonaceae) in the arid area of northern Shaanxi, China. Microorganisms in the rhizosphere soil of four crops were subjected to relative C and N limitation tests based on ecoenzymatic activities. Among the crops, potato and soybean exhibited the maximum limitations. Linear regression analysis of soil nutrients, microorganisms (stoichiometric homeostasis), and threshold elemental ratio synthetically supported microbial metabolic limitations. This finding coincided with the highest and lowest microbial carbon use efficiencies in soybean (0.58) and potato (0.51), illustrating the distinguishing physiological responses of microbes. Partial least squares path modeling further confirmed that the soil microbial nutrient limitations were significantly regulated by soil nutrient properties and extracellular enzyme activities. Taken together, soil microbial metabolism in agricultural ecosystems was co-limited by relative C and N regardless of the main food crop families in this region in China (northern Loess Plateau). These observations clarified the nutrient cycling driven by soil elemental stoichiometry at the root-soil interface in arid and oligotrophic ecosystems.
英文关键词	ecoenzymatic stoichiometry food crops microbial biomass microbial nutrient limitation rhizosphere
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000889679600001
WOS关键词	LOESS PLATEAU ; ENZYME-ACTIVITIES ; EXOENZYME ACTIVITY ; PLANT-GROWTH ; CARBON ; DYNAMICS ; NITROGEN ; COMMUNITY ; CHRONOSEQUENCE ; AFFORESTATION
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397727
推荐引用方式 GB/T 7714	Wang, Xuelian,Gong, Xiangwei,Li, Xiangyu,et al. Microbial nutrient limitation in rhizosphere soils of different food crop families: Evidence from ecoenzymatic stoichiometry[J],2023,34(4):1019-1034.
APA	Wang, Xuelian,Gong, Xiangwei,Li, Xiangyu,Sun, Sitong,Dang, Ke,&Feng, Baili.(2023).Microbial nutrient limitation in rhizosphere soils of different food crop families: Evidence from ecoenzymatic stoichiometry.LAND DEGRADATION & DEVELOPMENT,34(4),1019-1034.
MLA	Wang, Xuelian,et al."Microbial nutrient limitation in rhizosphere soils of different food crop families: Evidence from ecoenzymatic stoichiometry".LAND DEGRADATION & DEVELOPMENT 34.4(2023):1019-1034.