Arid
DOI10.1016/j.soilbio.2016.10.024
Combined effects of reduced irrigation and water quality on the soil microbial community of a citrus orchard under semi-arid conditions
Bastida, F.1; Torres, I. F.1; Romero-Trigueros, C.1; Baldrian, P.2; Vetrovsky, T.2; Bayona, J. M.1; Alarcon, J. J.1; Hernandez, T.1; Garcia, C.1; Nicolas, E.1
通讯作者Bastida, F.
来源期刊SOIL BIOLOGY & BIOCHEMISTRY
ISSN0038-0717
出版年2017
卷号104页码:226-237
英文摘要

Sustainable agriculture in Mediterranean areas is compromised by the structural deficit of water resources. Under this situation, the impacts of alternative water managements on the microbial community, as a critical component of the soil quality, need to be properly understood. We evaluated the long-term impacts of irrigation systems differing on the quantity and quality of water, and their interactions, on the biomass (phospholipid fatty acid analysis), diversity and composition (16S rRNA gene profiling), and enzyme activities of the soil microbial community of an orchard cultivated with grapefruit trees in South-East Spain. The impact of water quantity was evaluated by irrigation with optimal amount of water or by irrigation with a reduced volume of water in the temporal frame when the crop is less sensitive, so-called regulated deficit irrigation (RDI). The impact of water quality was evaluated attending to the source of the irrigation water: water from a river channel-transfer (TW) or reclaimed water from a wastewater treatment plant (RW). Electrical conductivity was higher in soils irrigated with RW than in soils irrigated with TW. The content of total organic C in the soil was affected by water quality but not by water quantity. Soils irrigated with TW showed higher total organic C than soils irrigated with RW. As in the case of plant productivity, RDI had a negative impact on plant productivity, soil microbial biomass and enzyme activities in summer. This finding indicates a slow-down of organic matter decomposition under restricted irrigation. Bacterial biomass was more sensitive to RDI when RW was used, whereas the fungal biomass was more sensitive to RDI when TW was used.


Bacterial diversity and plant productivity were more sensitive to water quantity than to water quality. The increase of the abundance of Proteobacteria and Bacteroidetes in soils irrigated with RW in summer suggested a higher resilience of this treatment mediated by copiotrophic organisms. A recovery of the enzyme activity and microbial biomass of soils irrigated with RW and RDI was observed in January and June. The resilience of biogeochemical and the microbial biomass processes after RDI coursed through changes in the structure of the microbial community as revealed by the multivariate analyses of fatty acids. The utilisation of reclaimed water during RDI promoted a more-resilient community that translated into a recovery of microbial biomass and enzyme activities after the water restriction ended. These results imply potential ecological benefits of the irrigation with reclaimed water that should be considered under the water limitation predicted in climate change models in Mediterranean areas. (C) 2016 Elsevier Ltd. All rights reserved.


英文关键词Microbial biomass Bacterial diversity Enzyme activities Regulated deficit irrigation Wastewaters Resilience
类型Article
语种英语
国家Spain ; Czech Republic
收录类别SCI-E
WOS记录号WOS:000389555900022
WOS关键词TREATED WASTE-WATER ; BACTERIAL COMMUNITY ; AGRICULTURAL SOILS ; ENZYME-ACTIVITIES ; RECLAIMED WATER ; ORGANIC-MATTER ; MANDARIN TREES ; SP NOV. ; RESPONSES ; CARBON
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/2XILL650/202459
作者单位1.CSIC, CEBAS, Campus Univ Espinardo,CP 30100,POB 164, Murcia, Spain;
2.CAS, Inst Microbiol, Lab Environm Microbiol, Videnska 1083, Prague 14220 4, Czech Republic
推荐引用方式
GB/T 7714
Bastida, F.,Torres, I. F.,Romero-Trigueros, C.,et al. Combined effects of reduced irrigation and water quality on the soil microbial community of a citrus orchard under semi-arid conditions[J],2017,104:226-237.
APA Bastida, F..,Torres, I. F..,Romero-Trigueros, C..,Baldrian, P..,Vetrovsky, T..,...&Nicolas, E..(2017).Combined effects of reduced irrigation and water quality on the soil microbial community of a citrus orchard under semi-arid conditions.SOIL BIOLOGY & BIOCHEMISTRY,104,226-237.
MLA Bastida, F.,et al."Combined effects of reduced irrigation and water quality on the soil microbial community of a citrus orchard under semi-arid conditions".SOIL BIOLOGY & BIOCHEMISTRY 104(2017):226-237.
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