Nutrition addition alleviates negative drought effects on Quercus acutissima seedlings.
In: Forest Ecology & Management, Jg. 562 (2024-06-15), S. N.PAG
academicJournal
Zugriff:
Changing precipitation patterns have exacerbated severe drought events, causing tree die-off and forest mortality. Nutrition addition, as a critical method for forest management, may alleviate negative drought effects. Therefore, we set up a two-factor orthogonal experiment to study the responses of the leaf structural traits of Quercus acutissima to nutrition addition under drought stress. Leaf structural traits, including leaf morphological traits, leaf mass, and leaf nutrition traits, were measured under nine water and nutrition addition treatments. Two-way analysis of variance was used to detect the main effect and interaction of water and nutrition addition on leaf structural traits, principal component analysis was used to screen key traits. Our results show that drought had a unique and decisive effect on leaf length, leaf width, and leaf center, while leaf thickness only depended on nutrition addition. Conversely, no treatments changed the leaf length-width ratio and leaf nitrogen-phosphorus ratio. Besides, nutrition addition alleviated negative drought effects on leaf area, leaf saturated mass, leaf dry mass, leaf nitrogen content, leaf phosphorus content, leaf volume, specific leaf area, and leaf dry-matter content. According to the principal component 1 (54.83%), we screened seven key traits from leaf structural traits, including leaf area, leaf saturated mass, leaf dry mass, leaf nitrogen content, leaf volume, specific leaf area, and leaf dry-matter content, to effectively capture changes in leaf structural traits. Our results demonstrate that under drought stress, nutrition addition enhanced soil nutrition availability, increased leaf nitrogen and leaf phosphorus content, and finally alleviated negative drought effects. Thus, nutrition addition is crucial for plants to get through drought and for forest ecological restoration under global climate change. • Negative drought effect starts from that drought shortened leaf length and width. • Nutrition addition alleviates drought effect from changing leaf shape and thickness. • Suitable nutrition addition may help forests cope with global climate change. • Leaf length-width ratio and nitrogen-phosphorus ratio are conservative traits. • Key traits can effectively capture plant response to drought and nutrition addition. [ABSTRACT FROM AUTHOR]
Titel: |
Nutrition addition alleviates negative drought effects on Quercus acutissima seedlings.
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Autor/in / Beteiligte Person: | Liu, Xiao ; Li, Qiang ; Sun, Xiaohan ; Yi, Shijie ; Wu, Pan ; Wang, Ning |
Zeitschrift: | Forest Ecology & Management, Jg. 562 (2024-06-15), S. N.PAG |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0378-1127 (print) |
DOI: | 10.1016/j.foreco.2024.121980 |
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