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ORIGINAL RESEARCH
The Effects of Nitrogen and Phosphorus
Addition on the Chemical Traits of the
Fine Roots of 14 Plant Species
1
School of Life Science and Technology, Mudanjiang Normal College, Mudanjiang, China
2
School of Chemistry and Chemical Engineering, Mudanjiang Normal College, Mudanjiang, China
These authors had equal contribution to this work
Submission date: 2024-06-28
Final revision date: 2024-08-20
Acceptance date: 2024-08-28
Online publication date: 2024-11-14
Publication date: 2025-11-04
Corresponding author
Dounan Liu
School of Chemistry and Chemical Engineering, Mudanjiang Normal College, Mudanjiang, China
School of Chemistry and Chemical Engineering, Mudanjiang Normal College, Mudanjiang, China
Pol. J. Environ. Stud. 2025;34(6):6899-6912
KEYWORDS
TOPICS
ABSTRACT
In order to comprehensively understand the patterns of changes in the chemical traits of plant fine
roots after nutrient addition, the study selected 8 woody plants and 6 herbaceous plants; nitrogen and
phosphorus were separately applied to their pots. In September 2017, we measured carbon and nitrogen
chemical traits of different diameter classes (with root diameters of less than 0.5 mm; root diameters
of 0.5-1 mm; root diameters of 1-2 mm). It analyzed the impact of nitrogen and phosphorus addition
on the total root carbon concentration (RTC), total root nitrogen concentration (RTN), and carbon-tonitrogen
ratio (RC/N) in plant fine roots. The research indicated that the impact level of fertilizers and
the interaction between species and fertilizers on the RTN and RC/N are highly significant. Under N
addition, all species showed an increase in the RTN across different diameter classes and a decrease in
RC/N; however, it is inconsistent under P addition. Herbaceous and woody plants exhibit a significant
increase in RTN across different diameter classes after nitrogen fertilization, while woody plants show a
significant decrease in RC/N. This suggests that under nitrogen addition, woody and herbaceous plants
exhibit similar trends in the RTN across different diameter classes. Regardless of fertilization, there is
a significant negative correlation between the RTN and RC/N for each diameter class. The relationship
between RTC and RC/N is not clear, indicating that although fertilization alters C and N chemical traits,
the relationship between them does not undergo a significant change.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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