Effects of water and nitrogen additions on the allocation pattern and stoichiometric characteristics of C, N, P, and K in Xanthoceras sorbifolia seedlings
[Objective] The study aims to investigate the response of C, N, P, and K distribution to water and nitrogen addition in Xanthoceras sorbifolia seedlings in order to provide references for water-nitrogen environmental adaptation strategies and high-quality seedling cultivation. [Methods] A two-fact...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Science Press
2024-11-01
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| Series: | Xibei zhiwu xuebao |
| Subjects: | |
| Online Access: | http://xbzwxb.cnjournals.com/xbzwxb/article/abstract/20240112?st=article_issue |
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| Summary: | [Objective] The study aims to investigate the response of C, N, P, and K distribution to water
and nitrogen addition in Xanthoceras sorbifolia seedlings in order to provide references for water-nitrogen
environmental adaptation strategies and high-quality seedling cultivation. [Methods] A two-factor (nitrogen
and water) randomized block design was adopted in this study. Four N fertilization levels [N0:0 g/m2, N1:
5 g/m2, N2:10 g/m2, and N3:15 g/m2] and three levels of water addition [well watered (WCK), drought
(Wd), and fully watered(Ww)] were set up to explore the impact on the ecological stoichiometric characteristics
of X . sorbifolia leaves, branches, and roots. [Results] (1) The C, N, P, and K levels of seedlings
were independently or interactively influenced by nitrogen and water, while the stoichiometric ratios
were mainly affected by nitrogen addition. Under well-watered conditions (WCK), nitrogen addition increased
C, N, and P levels. Under drought conditions (Wd), high nitrogen addition (N3) could resist
drought by increasing K level and decreasing N and P levels. Under well-watered conditions (Ww), only
high nitrogen addition (N3) effectively alleviated nitrogen limitation. (2) C, N, P, and K nutrients were
mainly concentrated in leaves, supporting photosynthesis and vegetative growth. The variability of N and
P contents in leaves was high, but the N/P ratio remained stable. (3) The same element exhibited a high
correlation among different organs, particularly between leaves and roots, maintaining stable growth.
[Conclusion] Nitrogen addition alleviates nitrogen deprivation but increases the demand for P and K. It is
recommended to reduce nitrogen fertilizer application under suitable water condition to reduce pollution and
maintain growth potential. |
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| ISSN: | 1000-4025 |