Effects of Salinity and pH Change Conditions on Organic Carbon Mineralization in Saline Alkali Land
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College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, People’s Republic of China
Bureau of Agriculture, Animal Husbandry and Science and Technology, China
Submission date: 2022-12-24
Final revision date: 2023-05-26
Acceptance date: 2023-07-20
Online publication date: 2023-10-16
Publication date: 2023-11-10
Corresponding author
Zhang Chengfu   

Inner Mongolia Agricultural University, China
Pol. J. Environ. Stud. 2023;32(6):5885–5897
Little attention has been paid to the process of mineralization of saline-alkali soils. Effects of litter addition and no addition on organic carbon mineralization in saline-alkali soil under different salinity and pH conditions under simulated natural state. The results showed that litter addition significantly (P<0.05) increased the cumulative mineralization of the 3 plots. Under the same salinity and pH conditions (except pH 10.5), the Alashan (ALS) plot has the highest cumulative mineralization among the 3 plots; under different conditions, there is no significant effect on the mineralization of the ALS plot; the Wulanchabu (WLCB) plot The mineralization amount was the highest at S9 and pH10.5, which were 2.23 g·kg-1 and 1.84 g·kg-1, respectively; the mineralization amount of the Eerduosi (ERDOS) plot decreased significantly with the gradient (P<0.05). The cumulative mineralization process fits the first-order kinetic model. Therefore, changes in salinity and pH conditions are not the most important factors affecting the cumulative mineralization of the 3 plots, but the physical and chemical properties of the soil itself and the chemical composition of litter have a closer influence on it.