ORIGINAL RESEARCH
Soil Respiration from Different Halophytic Plants
in Coastal Saline-Alkali Soils
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1
Key Laboratory of Agricultural Water Resources, Hebei Key Laboratory of Soil Ecology,
Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology,
Chinese Academy of Sciences, Shijiazhuang, China
2
University of Chinese Academy of Sciences, Beijing, China
Submission date: 2019-09-24
Final revision date: 2019-12-03
Acceptance date: 2019-12-09
Online publication date: 2020-03-27
Publication date: 2020-05-12
Corresponding author
Xiaojing Liu
Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, China
Pol. J. Environ. Stud. 2020;29(5):3203-3211
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ABSTRACT
Cultivation and growing salt-tolerant (halophytes) plants in coastal saline-alkali soils has been
regarded as an effective way to reduce soil salinization and restore degraded vegetation. Planting
halophytic plants generally alters soil properties and indirectly influences soil respiration. The aim
of this paper is to evaluate the seasonal variation in soil respiration under different vegetation types
in coastal saline-alkali land in northern China, and to identify how tree species, stand age, and soil
properties (soil temperature, moisture, and salinity) explained the temporal and spatial variation in soil
respiration. Soil respiration from halophytic plants (Tamarix chinensis and Lycium chinense) and salinealkali
bare land were measured using an LI-COR 6400XT portable photosynthesis system equipped
with a portable soil CO2 flux chamber from May to October 2016. The results indicated that T. chinensis
and L. chinense shrub communities significantly reduced soil salinity, slightly reduced soil bulk density,
improved soil organic carbon, and promoted the microbial community. Soil respiration from T. chinensis
and L. chinense plantations were significantly higher than that from bare land. Coastal salinized bare
land is a weak carbon source for global carbon. Soil respiration was generally restrained by soi salinity
and reduced with increasing soil salinity. Soil respiration showed a positive and negative correlation ith
soil temperature, moisture, and salinity. Incorporating salinity, together with soil temperature and other
abiotic factors, may improve predictions for soil CO2 respiration.