@Article{phyton.2022.023397,
AUTHOR = {Juan Liu, Meiqun Zheng, Xueshuang Chen},
TITLE = {Effects of Fertilization on Soil CO<sub>2</sub> Efflux in Chinese Hickory (<i>Carya cathayensis</i>) Stand},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {92},
YEAR = {2023},
NUMBER = {1},
PAGES = {271--283},
URL = {http://www.techscience.com/phyton/v92n1/49579},
ISSN = {1851-5657},
ABSTRACT = {Chinese hickory (<i>Carya cathayensis</i> Sarg.) is a popular nut tree in China, but there is little information about the
influences of fertilization on soil CO<sub>2</sub> efflux and soil microbial biomass. This study evaluated the short-term
effects of different fertilizer applications on soil CO<sub>2</sub> efflux and soil microbial biomass in Chinese hickory stands.
Four fertilizer treatments were established: control (CK, no fertilizer), inorganic fertilizer (IF), organic fertilizer
(OF), and equal parts organic and inorganic N fertilizers (OIF). A field experiment was conducted to measure
soil CO<sub>2</sub> effluxes using closed chamber and gas chromatography techniques. Regardless of the fertilization practices, soil CO<sub>2</sub> effluxes of all the treatments showed a similar temporal pattern, with the highest value in summer
and the lowest in winter. The mean annual soil CO<sub>2</sub> efflux in the IF treatment was significantly higher than that in
the CK, OIF, and OF treatments. There was no significant difference in soil CO<sub>2</sub> efflux between the OIF, OF, and
CK treatments. Soil CO<sub>2</sub> effluxes were significantly affected by soil temperature. Soil dissolved organic carbon
(DOC) was positively correlated with soil CO<sub>2</sub> efflux only in the CK treatment. Regression analysis, including soil
temperature, moisture, and DOC, showed that soil temperature was the primary factor influencing soil CO<sub>2</sub>
effluxes. Both OF and OIF treatments increased concentrations of soil microbial biomass carbon (MBC) and
microbial biomass nitrogen (MBN), but decreased the ratio of MBC:MBN. These results reveal that applying
organic fertilizer, either alone or combined with inorganic fertilizer, may be the optimal strategy for mitigating
soil CO<sub>2</sub> emission and improving soil quality in Chinese hickory stands.},
DOI = {10.32604/phyton.2022.023397}
}