Arid
DOI10.1007/s00374-018-1277-6
Plant roots and species moderate the salinity effect on microbial respiration, biomass, and enzyme activities in a sandy clay soil
Boyrahmadi, Mozhgan; Raiesi, Fayez
通讯作者Boyrahmadi, Mozhgan
来源期刊BIOLOGY AND FERTILITY OF SOILS
ISSN0178-2762
EISSN1432-0789
出版年2018
卷号54期号:4页码:509-521
英文摘要

The aim of this study was to determine the effects of plant absence or presence on microbial properties and enzyme activities at different levels of salinity in a sandy clay soil. The treatments involved five salinity levels-0.5 (control), 2.5, 5, 7.5, and 10 dS m(-1) which were prepared using a mixture of chloride salts-and three soil environments (unplanted soil, and soils planted with either wheat or clover) under greenhouse conditions. Each treatment was replicated three times. At the end of the experiment, soil microbial respiration, substrate-induced respiration (SIR), microbial biomass C (MBC), and enzyme activities were determined after plant harvest. Increasing salinity decreased soil microbial properties and enzyme activities, but increased the metabolic quotient (qCO(2)) in both unplanted and planted soils. Most microbial properties of planted soils were greater than those of unplanted soils at low to moderate salinity levels, depending upon plant species. There was a small or no difference in soil properties between the unplanted and planted treatments at the highest salinity level, indicating that the indirect effects of plant presence might be less important due to significant reduction of plant growth. The lowered microbial activity and biomass, and enzyme activities were due to the reduction of root activity and biomass in salinized soils. The lower values of qCO(2) in planted than unplanted soils support the positive influence of plant root and its exudates on soil microbial activity and biomass in saline soils. Nonetheless, the role of plants in alleviating salinity influence on soil microbial activities decreases at high salinity levels and depends on plant type. In conclusion, cultivation and growing plant in abandoned saline environments with moderate salinity would improve soil microbial properties and functions by reducing salinity effect, in particular planting moderately tolerant crops. This helps to maintain or increase the fertility and quality of abandoned saline soils in arid regions.


英文关键词Enzyme activity Microbial indicators Root effects Plant type Salinity stress
类型Article
语种英语
国家Iran
收录类别SCI-E
WOS记录号WOS:000431189400007
WOS关键词NITROGEN MINERALIZATION ; BIOCHEMICAL-PROPERTIES ; METAL PHYTOEXTRACTION ; METABOLIC QUOTIENT ; ORGANIC-MATTER ; SODIC SOIL ; CARBON ; COMMUNITY ; DROUGHT ; RESIDUE
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/2XILL650/208124
作者单位Shahrekord Univ, Dept Soil Sci & Engn, Fac Agr, POB 115, Shahrekord, Iran
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GB/T 7714
Boyrahmadi, Mozhgan,Raiesi, Fayez. Plant roots and species moderate the salinity effect on microbial respiration, biomass, and enzyme activities in a sandy clay soil[J],2018,54(4):509-521.
APA Boyrahmadi, Mozhgan,&Raiesi, Fayez.(2018).Plant roots and species moderate the salinity effect on microbial respiration, biomass, and enzyme activities in a sandy clay soil.BIOLOGY AND FERTILITY OF SOILS,54(4),509-521.
MLA Boyrahmadi, Mozhgan,et al."Plant roots and species moderate the salinity effect on microbial respiration, biomass, and enzyme activities in a sandy clay soil".BIOLOGY AND FERTILITY OF SOILS 54.4(2018):509-521.
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