Effects of elevated temperature and nitrogen fertilization on nitrogen metabolism and nutrient status of two coniferous species

Zhao, Chunzhang; Jin, Liang; He, Jin; Liu, Qing

doi:10.1080/00380768.2012.749523

Cited by 4 publications

(5 citation statements)

References 48 publications

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“…The increase in foliar N combined with the decrease in K, Ca, and Mg under N addition resulted in an increase in the stoichiometric ratios of N relative to K, Ca, and Mg in this meta‐analysis (Figure b), suggesting that nutrient balance of plants may be altered under high N deposition, which may limit photosynthetic capacity and growth, further leading to forest declines (Elvir et al, ; Mcnulty et al, ; Whytemare et al, ). In addition, Ca:Al significantly decreased by 15.17% (7.75–22.65%; Figure b) following N addition suggesting that further increase in N deposition may lead to Al stress (Zhao et al, ), which has also been observed in previous studies (Cronan & Grigal, ; Mao et al, ; Zhao et al, ). This N‐induced Al stress may cause (i) growth reductions and increased root mortality as a result of Al toxicity or (ii) impaired Ca and Mg uptake and nutrient imbalances because of Al antagonism (Cronan & Grigal, ).…”

Section: Discussionsupporting

confidence: 80%

“…In addition, Ca:Al significantly decreased by 15.17% (7.75-22.65%; Figure 1b) following N addition suggesting that further increase in N deposition may lead to Al stress (Zhao et al, 2012), which has also been observed in previous studies (Cronan & Grigal, 1995;Mao et al, 2018;Zhao et al, 2012). This N-induced Al stress may cause (i) growth reductions and increased root mortality as a result of Al toxicity or (ii) impaired Ca and Mg uptake and nutrient imbalances because of Al antagonism (Cronan & Grigal, 1995).…”

Section: 1029/2019jg005347mentioning

confidence: 99%

“…It is essential to maintain relatively stable nutrient ratios in plant tissues for healthy growth (the stoichiometric homeostasis hypothesis) (Sterner & Elser, ). For example, the ratio of N to other foliar elements remarkably influences plant physiological processes and metabolism (Zhao et al, ). The Ca:Al (calcium: aluminum) ratio provides approximate thresholds beyond which the risk of forest damage from Al stress and nutrient imbalances increases (Cronan & Grigal, ; Reich et al, ); this ratio is useful for assessing the potential impacts of environmental factors on ecosystems.…”

Section: Introductionmentioning

confidence: 99%

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Responses of Foliar Nutrient Status and Stoichiometry to Nitrogen Addition in Different Ecosystems: A Meta‐analysis

Mao

Zheng

2020

JGR Biogeosciences

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Atmospheric nitrogen (N) deposition alters the cycling of nutrients in terrestrial ecosystems. However, there is limited knowledge regarding how N addition affects foliar nutrients beyond N and phosphorus (P) and their stoichiometry. We conducted a meta‐analysis, including 2,004 observations from 134 fertilization studies, to synthesize the effects of N addition on multiple foliar nutrients and stoichiometry in terrestrial ecosystems and to examine their potential controls. Overall, we found that N addition significantly decreased foliar P, potassium (K), calcium (Ca), magnesium (Mg), and calcium:aluminium (Ca:Al) by 3.22%, 7.58%, 9.55%, 5.65%, and 15.17%, respectively, but significantly increased foliar N, Al, N:K, N:Ca, and N:Mg by 19.02%, 6.99%, 21.06%, 27.65%, and 11.33%, respectively. Among the forest ecosystems, foliar N and P exhibited greater changes in temperate or boreal forests, and foliar K, Mg, and Mn showed greater decreases or increases in tropical forests after N addition. Nitrogen addition significantly affected foliar K (−7.55%), Mg (−6.46%), and Al (+6.81%) in forests but not in grasslands. Similarly, foliar K, Mg, and Al showed significant changes in woody plants but not in herbaceous plants. In addition, we found that environmental factors (e.g., ambient N deposition, mean annual precipitation, and soil pH) affected foliar nutrient responses of N, K, and Mg to N addition. In summary, our findings indicate that N addition affects foliar nutrient contents, with the extent of these effects differing among ecosystem type. This is important for understanding and predicting plant growth and nutrient dynamics under N deposition scenarios.

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Section: Discussionsupporting

confidence: 80%

Section: 1029/2019jg005347mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Responses of Foliar Nutrient Status and Stoichiometry to Nitrogen Addition in Different Ecosystems: A Meta‐analysis

Mao

Zheng

2020

JGR Biogeosciences

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“…P. asperata as one of the key species is commonly associated with ECM fungi in this region. It was reported that experimental warming enhanced photosynthetic rates and biomass 34 , and changed plant nutrition by altering root growth and physiology of P. asperata 35 . However, these studies ignored the potential changes in ECM colonization, abundance, and the relationships of ECM and root physiology and N nutrition under warming.…”

mentioning

confidence: 99%

Effects of warming on ectomycorrhizal colonization and nitrogen nutrition of Picea asperata seedlings grown in two contrasting forest ecosystems

Sun

et al. 2015

Sci Rep

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Ectomycorrhiza (ECM) plays an important role in plant nitrogen (N) nutrition and regulates plant responded to climate warming. We conducted a field experiment in a natural forest and a plantation in the eastern Tibetan Plateau to estimate the warming effects of open-top chambers (OTC) on ECM and N nutrition of Picea asperata seedlings. Four-year warming significantly decreased ECM colonization, ECM fungal biomass, fine root vigor, and the N concentration of leaf, stem and coarse root, but significantly increased fine root N concentration and N content of leaf, stem, fine root and whole plant in natural forest. Contrarily, warming induced no obvious change in most of these parameters in plantation. Moreover, warming decreased rhizospheric soil inorganic N content in both forests. Our results showed that four-year warming was not beneficial for ECM colonization of P. asperata seedlings in the two forests, and the seedlings in natural forest were more sensitive and flexible to experimental warming than in plantation. The changes of ECM colonization and fine root biomass for effective N uptake would be good for plant growth and remit N leaching under future warming in natural forest.

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“…However, it rarely involves the combined effects of water and nitrogen availabilities on the ECM community, particularly with regard to the response of different exploration types of ECM fungi to water and nitrogen availabilities in the subalpine forest ecosystem of the Eastern Tibetan Plateau. In addition, many previous studies regarding P. asperata in this region have mainly focused on the physiological growth ( e.g ., photosynthesis, biomass, or root activity) under climate change ( e.g ., temperature, nitrogen deposition, drought; H. J. Yin et al., 2008; C. Yin et al., 2018; Zhao et al., 2012), and few studies have attempted to explore ECM community structure and diversity of P. asperata forest but ignored the combined effects of soil water and nitrogen availabilities on ECM community and diversity.…”

Section: Introductionmentioning

confidence: 99%

Effects of soil water regime and nitrogen addition on ectomycorrhizal community structure of Picea asperata seedlings

Xie

Wang

Pang

et al. 2021

J. Plant Nutr. Soil Sci.

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Background Ectomycorrhizal (ECM) symbiosis is a fundamental driver in forest ecosystems. Studies of effects of fertilizer treatment on ECM fungal community structure were predominantly based on large, single additions of nitrogen. Studies involving chronic additions of nitrogen in combination with different gradients of water regime are much less common. Aim To investigate effects of water regime and nitrogen addition on the structure and diversity of ECM community, and identify main factors leading to changes in ECM community of Picea asperata. Methods The structure and diversity of the ECM community were assessed by Illumina high throughput sequencing analysis of the internal transcribed spacer (ITS) region of rDNA extracted from ECM root tips, after 5 years of different gradients of water regimes [40% (W1), 50% (W2), 60% (W3), 80% (W4) and 100% (W5) of field capacity, respectively] and nitrogen additions [0 (N0), 20 (N1), 40 (N2) g N m–2 y–1 by adding ammonium nitrate (NH4NO3) solution]. Results ECM community structure was altered by water and nitrogen treatments. Clearer separations were found under water treatment than under nitrogen treatment. ECM community species richness of N1 was significantly higher than that of N2 under W5 treatment and was significantly influenced by the interaction of water and nitrogen. However, the diversity and evenness of the ECM community were unaffected. Soil water content (SWC), nitrogen availability and their interaction, soil available phosphorus, and pH (which were induced by treatments) significantly explained the variation in ECM community structure among different treatments. Conclusion ECM species are more sensitive to changes in SWC than changes in nitrogen addition. Nitrogen and water treatments influenced the structure of the ECM community mainly through altering the relative abundances of exploration types and specific genera. Our findings can enhance understanding of the implications of nitrogen addition and water regime on soil processes in ECM‐dominated coniferous forests under global changes.

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Effects of elevated temperature and nitrogen fertilization on nitrogen metabolism and nutrient status of two coniferous species

Cited by 4 publications

References 48 publications

Responses of Foliar Nutrient Status and Stoichiometry to Nitrogen Addition in Different Ecosystems: A Meta‐analysis

Responses of Foliar Nutrient Status and Stoichiometry to Nitrogen Addition in Different Ecosystems: A Meta‐analysis

Effects of warming on ectomycorrhizal colonization and nitrogen nutrition of Picea asperata seedlings grown in two contrasting forest ecosystems

Effects of soil water regime and nitrogen addition on ectomycorrhizal community structure of Picea asperata seedlings

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