干旱区生态环境知识资源中心(Arid): Spatial and Temporal Distribution of Soil Microbial Properties in Two Shrub Intercrop Systems of the Sahel

Arid

DOI	10.3389/fsufs.2021.621689
	Spatial and Temporal Distribution of Soil Microbial Properties in Two Shrub Intercrop Systems of the Sahel
	Diedhiou-Sall, Sire; Assigbetsee, Komi B.; Badiane, Aminata N.; Diedhiou, Ibrahima; Khouma, M.; Dick, Richard P.
通讯作者	Dick, RP (corresponding author), Ohio State Univ, Sch Environm & Nat Resources, Columbus, OH 43210 USA.
来源期刊	FRONTIERS IN SUSTAINABLE FOOD SYSTEMS
EISSN	2571-581X
出版年	2021
卷号	5
英文摘要	The Sahel is an ecologically vulnerable region where increasing populations with a concurrent increase in agricultural intensity has degraded soils. Agroforestry offers an approach to remediate these landscapes. A largely unrecognized agroforestry resource in the Sahel are the native shrubs, Piliostigma reticulatum, and Guiera senegalensis that to varying degrees already coexist with row crops. These shrubs improve soil quality, redistribute water from the deep soil to the surface (hydraulic lift), and can improve crop growth. However, little information is available on whether these shrubs affect spatial and temporal dynamics of microbial communities. Therefore, the objective of this study was to determine microbial composition and activity in the wet and dry seasons of soil in the: shrub rhizosphere (RhizS), inter-root zone (IntrS), and outside the influence of shrub soil (OutS) for both G. senegalensis and P. reticulatum in Senegal. A 3 x 2 factorial field experiment was imposed at two locations (490 and 700 mm annual rainfall with G. senegalensis and P. reticulatum, respectively), that had the soil sampling treatments of three locations (RhizS, IntrS, and OutS) and two seasons (wet and dry). Soils were analyzed for: microbial diversity (DGGE with bacterial 16S or fungal 28S rRNA gene sequences phospholipids fatty acid, PLFA); enzyme activities; microbial biomass carbon (MBC); and nitrogen (N) mineralization potential. For the DGGE profiling, the bacterial community responded more to the rhizosphere effect, whereas, the fungal community was more sensitive to season. PLFA, MBC, enzyme activities and inorganic N were significantly higher in both seasons for the RhizS. The presence of shrubs maintained rhizosphere microbial communities and activity during the dry season. This represents a paradigm shift for semi-arid environments where logically it would be expected to have no microbial activity in the extended dry season. In contrast this study has shown this is not the case that rather the presence of shrub roots maintained the microbial community in the dry season most likely due to hydraulic lift and root exudates. This has implications when these shrubs are in cropped fields in that decomposition and mineralization of nutrients can proceed in the dry season. Thus, enabling accumulation of plant available nutrients during the dry season for uptake by crops in the rainy season.
英文关键词	microbial diversity soil shrub-intercropping DGGE PLFA
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000633100200001
WOS关键词	FATTY-ACID PROFILES ; GRADIENT GEL-ELECTROPHORESIS ; COMMUNITY STRUCTURE ; CROP PRODUCTIVITY ; HYDRAULIC LIFT ; SUBSTRATE UTILIZATION ; NUTRIENT DYNAMICS ; FARMING SYSTEM ; WATER-BALANCE ; NATIVE SHRUBS
WOS类目	Food Science & Technology
WOS研究方向	Food Science & Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368948
作者单位	[Diedhiou-Sall, Sire] Assane Seck Univ, Dept Agroforestry, Ziguinchor, Senegal; [Assigbetsee, Komi B.] Inst Rech Dev Senegal IRD, Dakar, Senegal; [Badiane, Aminata N.] African Resource Grp, Dakar, Senegal; [Diedhiou, Ibrahima] Inst Senegalais Rech Agr ISRA, Ctr Natl Rech Agr CNRA, Bambey, Senegal; [Khouma, M.] Inst Senegalais Rech Agr ISRA, Lab Natl Rech Prod Vegetales LNRPV, Dakar, Senegal; [Dick, Richard P.] Ohio State Univ, Sch Environm & Nat Resources, Columbus, OH 43210 USA
推荐引用方式 GB/T 7714	Diedhiou-Sall, Sire,Assigbetsee, Komi B.,Badiane, Aminata N.,et al. Spatial and Temporal Distribution of Soil Microbial Properties in Two Shrub Intercrop Systems of the Sahel[J],2021,5.
APA	Diedhiou-Sall, Sire,Assigbetsee, Komi B.,Badiane, Aminata N.,Diedhiou, Ibrahima,Khouma, M.,&Dick, Richard P..(2021).Spatial and Temporal Distribution of Soil Microbial Properties in Two Shrub Intercrop Systems of the Sahel.FRONTIERS IN SUSTAINABLE FOOD SYSTEMS,5.
MLA	Diedhiou-Sall, Sire,et al."Spatial and Temporal Distribution of Soil Microbial Properties in Two Shrub Intercrop Systems of the Sahel".FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 5(2021).