Soil Enzyme Activity and Microbial Metabolic Function Diversity in Soda Saline–Alkali Rice Paddy Fields of Northeast China

Yunke Qu, Jie Tang, Zhaoyang Li, Zihao Zhou, Jingjing Wang, Sining Wang and Yidan Cao
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Yunke Qu: Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, China
Jie Tang: College of New Energy and Environment, Jilin University, Changchun 130012, China
Zhaoyang Li: College of New Energy and Environment, Jilin University, Changchun 130012, China
Zihao Zhou: College of New Energy and Environment, Jilin University, Changchun 130012, China
Jingjing Wang: College of New Energy and Environment, Jilin University, Changchun 130012, China
Sining Wang: College of New Energy and Environment, Jilin University, Changchun 130012, China
Yidan Cao: College of New Energy and Environment, Jilin University, Changchun 130012, China

Sustainability, 2020, vol. 12, issue 23, 1-15

Abstract: Western Jilin province has the most serious area of soda salinization in Northeast China, which affects and restricts the sustainable development of agriculture. The effects of physico-chemical properties of rhizosphere and non-rhizosphere soil on soil microbial diversity and enzyme activities (polyphenol oxidase, catalase, invertase, amylase) were evaluated in typical soda saline-alkali paddy field. Community-level physiological profile (CLPP) based on Biolog-ECO plates was used to assess the functional diversity of soil microorganisms. Exchangeable sodium percentage (ESP) and pH were negative correlated with the microbial activity (AWCD), soil enzyme activities (amylase, sucrose, and catalase, except for polyphenol oxidase) in rice rhizosphere and non-rhizosphere soil ( P < 0.05). The indexes of microbial diversity in rice rhizosphere soil were significantly higher than that of non-rhizosphere soil. The utilization of amino acids by rice rhizosphere microorganisms was relatively high, while non-rhizosphere soil had relatively high utilization of carboxylic acid, phenolic acid, and amine. Among the selected physico-chemical properties, soil organic carbon (SOC) and soil water content (SWC) had the greatest influence on the variation of microbial diversity indexes and enzyme activities in rhizosphere soil. ESP and pH showed a significant positive correlation with carbon source utilization, especially for amine (AM) and phenolic acid (PA) carbon source utilization ( P < 0.05) by means of RDA, and the utilization rate of AM and PA carbon sources by rice rhizosphere and non-root soil microorganisms was P1 < P2 < P3.

Keywords: physic-chemical properties; enzyme activities; microbial diversity; utilization of carbon source; saline-alkali paddy soil (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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