干旱区生态环境知识资源中心(Arid): Resilience of the microbial communities of semiarid agricultural soils during natural climatic variability events

Arid

DOI	10.1016/j.apsoil.2019.103487
	Resilience of the microbial communities of semiarid agricultural soils during natural climatic variability events
	Perez-Guzman, Lumarie 1; Acosta-Martinez, Veronica 1; Phillips, Lori A.2; Mauget, Steven A.1
通讯作者	Acosta-Martinez, Veronica
来源期刊	APPLIED SOIL ECOLOGY
ISSN	0929-1393
EISSN	1873-0272
出版年	2020
卷号	149
英文摘要	The microbial community carries out important processes that support plant growth and maintain soil health. However, extreme climatic variability such as higher temperatures and prolonged drought may cause fluctuations in the microbial community abundance, composition, and activity, thus affecting essential functions they govern including nutrient cycling and soil organic matter (SOM) dynamics. This study evaluated five agricultural lands under continuous cotton (Gossypium hirsutum L.) production from the Texas High Plains semi-arid region during the growing season and post-harvest from 2014 to 2018. Although sites differed in irrigation practices and soil textural class (e.g. from sandy loam to clay), all responded similarly to a decrease in precipitation, and increase in temperatures from 2015 to 2016. Microbial abundance via ester linked-fatty acid methyl ester (EL-FAME) analysis during the growing season of 2016 decreased by 82% in the sandiest soil, and by 38% in the soil with highest clay, when compared to 2015, a year of record precipitation for this region (e.g., 693 vs. 465 mm). Similarly, enzyme activities were reduced by as much as 87% (depending on the site) in the 2016 growing season when compared to 2015. The significant decreases in the soil microbial component could be explained by extremely low soil moisture (e.g., gravimetric water content averaged 2% in drylands, and 6% in irrigated sites) associated to low precipitation and high soil temperatures during the 2016 growing season (6.7 degrees C warmer than 2015). Furthermore, these conditions resulted in shifts in microbial community composition, especially significant decrease (p < 0.05) of saprophytic fungal markers by 59% (e.g., from an average of 26.8 to 10.9 nmol g(-1) soil). However, after 2016 all biological parameters showed increasing trends, thus demonstrating a remarkable recovery and higher resilience than expected for semiarid soils, which experience extremes in temperature, frequent droughts and have low SOM (< 1%).
英文关键词	Drought Enzyme activity EL-FAME Microbial biomass Resilience
类型	Article
语种	英语
国家	USA ; Canada
收录类别	SCI-E
WOS记录号	WOS:000511288300003
WOS关键词	RECORD DROUGHT/HEAT WAVE ; ENZYME-ACTIVITIES ; EXTRACTION METHOD ; ORGANIC-MATTER ; HIGH-PLAINS ; BIOMASS ; TEMPERATURE ; MOISTURE ; NITROGEN ; FUMIGATION
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/2XILL650/314059
作者单位	1.USDA ARS, Cropping Syst Res Lab, Wind Eros & Water Conservat Unit, Lubbock, TX 79415 USA; 2.Agr & Agri Food Canada, Harrow, ON N0R 1G0, Canada
推荐引用方式 GB/T 7714	Perez-Guzman, Lumarie,Acosta-Martinez, Veronica,Phillips, Lori A.,et al. Resilience of the microbial communities of semiarid agricultural soils during natural climatic variability events[J],2020,149.
APA	Perez-Guzman, Lumarie,Acosta-Martinez, Veronica,Phillips, Lori A.,&Mauget, Steven A..(2020).Resilience of the microbial communities of semiarid agricultural soils during natural climatic variability events.APPLIED SOIL ECOLOGY,149.
MLA	Perez-Guzman, Lumarie,et al."Resilience of the microbial communities of semiarid agricultural soils during natural climatic variability events".APPLIED SOIL ECOLOGY 149(2020).