Salinity is not only a threat to organisms and ecosystems, but also a
major factor restricting the development of agricultural production.
This study aimed to explore the modification effect of in-situ Jerusalem
artichoke (genotype NY-1) cultivation on the rhizosphere
micro-ecological environment in the saline-alkali region along the
southeast coast of China. We analyzed the change of carbon and nitrogen
in the saline soil from a microbial perspective, through the
quantification of the area of root channels, rhizosphere secretions and
soil microbiome (cbbL, cbbM and nifH). The root channels of NY-1 not
only improved the physical structure of saline soil, but also provided a
living space for microorganisms, afforded basic conditions for the
optimization of the soil micro-ecological environment. In addition,
rhizosphere secretions (from roots of NY-1 as well as microorganisms),
such as carbohydrates, hydrocarbons, acids, etc., could be considered as
a way to improve the saline-alkali soil habitat. NY-1 increased the
diversity and abundance of autotrophic and nitrogen-fixing bacteria in
saline soil (rhizosphere > bulk soils), which should be a
biological way to increase the amount of carbon and nitrogen fixation in
soil. Moreover, some of the detected genera (Sideroxydans, Thiobacillus,
Sulfuritalea, Desulfuromonas, etc.) participate in the carbon and
nitrogen cycles, and in the biogeochemical cycle of other elements. In
short, Jerusalem artichoke can improve not only the physical and
chemical properties of saline-alkali soil, but also promote material
circulation and energy flow in the micro-ecological rhizosphere
environment of saline soils.
Effect of industrial crop Jerusalem artichoke on the micro-ecological rhizosphere environment in saline soil
