Nitrogen enrichment alters nutrient resorption and exacerbates phosphorus limitation in the desert shrub <i>Artemisia ordosica</i>

Zheng, Jufeng; She, Weiwei; Zhang, Yuqing; Bai, Yuxuan; Qin, Shugao; Wu, Bin

doi:10.1002/ece3.4407

Cited by 13 publications

(8 citation statements)

References 59 publications

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“…Both low and high P addition increased seed production in the presence of N addition, and the increment was significantly higher under high N addition than under low N addition, indicating that a P limitation of seed production can be triggered by N addition. This phenomenon is supported by model simulation work (Menge & Field, 2007) as well several field experiments (Marklein & Houlton, 2012; Zheng et al, 2018). Plants capable of a high growth rate under N‐rich conditions will require a greater allocation of P‐rich rRNA to support macromolecular (protein, rRNA) synthesis (Niklas et al, 2005).…”

Section: Discussionsupporting

confidence: 52%

Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe

Liu

You

et al. 2021

Ecology and Evolution

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Previous studies have demonstrated changes in plant growth and reproduction in response to nutrient availability, but responses of plant growth and reproduction to multiple levels of nutrient enrichment remain unclear. In this study, a factorial field experiment was performed with manipulation of nitrogen (N) and phosphorus (P) availability to examine seed production of the dominant species, Stipa krylovii, in response to N and P addition in a temperate steppe. There were three levels of N and P addition in this experiment, including no N addition (0 g N m−2 year−1), low N addition (10 g N m−2 year−1), and high N addition (40 g N m−2 year−1) for N addition treatment, and no P addition (0 g P m−2 year−1), low P addition (5 g P m−2 year−1), and high P addition (10 g P m−2 year−1) for P addition treatment. Low N addition enhanced seed production by 814%, 1371%, and 1321% under ambient, low, and high P addition levels, respectively. High N addition increased seed production by 2136%, 3560%, and 3550% under ambient, low, and high P addition levels, respectively. However, P addition did not affect seed production in the absence of N addition, but enhanced it under N addition. N addition enhanced seed production mainly by increasing the tiller number and inflorescence abundance per plant, whereas P addition stimulated it by decreasing the plant density yet stimulating height of plants and their seed number per inflorescence. Our results indicate seed production is not limited by P availability but rather by N availability in the temperate steppe, whereas seed production will be increased by P addition when N availability is improved. These findings enable a better understanding of plant reproduction dynamics in the temperate steppe under intensified nutrient enrichment and can inform their improved management in the future.

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Section: Discussionsupporting

confidence: 52%

Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe

Liu

You

et al. 2021

Ecology and Evolution

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“…Both low and high P addition increased seed production in the presence of N addition, and the increment was significantly higher under high N addition than under low N addition, indicating that a P limitation of seed production can be triggered by N addition. This phenomenon is supported by model simulation work (Menge & Field, 2007) as well several field experiments (Marklein & Houlton, 2012;Zheng et al, 2018). Plants capable of a high growth rate under N-rich conditions will require a greater allocation of P-rich rRNA to support macromolecular (protein, rRNA) synthesis (Niklas et al, 2005).…”

Section: Impact Of P Addition On Seed Productionmentioning

confidence: 81%

Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe

Liu

You

et al. 2021

Preprint

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Previous studies have demonstrated changes in plant growth and reproduction in response to nutrient availability, but how investigations of such responses to multiple levels of nutrient enrichment remains unclear. In this study, we manipulated nitrogen (N) and phosphorus (P) availability to examine seed production responses to three levels each of N and P addition in a factorial experiment: no N addition (0 g N m-2 yr-1), low N addition (10 g N m-2 yr-1), high N addition (40 g N m-2 yr-1), and no P addition (0 g P m-2 yr-1), low P addition (5 g P m-2 yr-1), high P addition (10 g P m-2 yr-1). Low N addition enhanced seed production by 814%, 1371%, and 1321% under ambient, low, and high P addition levels, respectively. High N addition increased seed production by 2136%, 3560%, and 3550% under ambient, low, and high P addition levels, respectively. However, P addition did not affect seed production in the absence of N addition, but it did enhance it under N addition. Furthermore, N addition enhanced seed production mainly by increasing the tiller number and inflorescence abundance per plant, whereas P addition stimulated it by decreasing the plant density yet stimulating height of plants and their seed number per inflorescence. Our results indicate seed production is limited not by P but rather by N in the temperate steppe, whereas seed production will be increased by P addition when N availability is improved. These findings enable a better understanding of plant reproduction dynamics of steppe ecosystems under intensified nutrient enrichment and can inform their improved management in the future.

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“…A previous study also showed that the PRE of one grass species decreased while that of another increased with increasing SAP (Li, Gao, et al, 2016). However, Zheng et al (2018) found no significant relationship between PRE and SAP. These remarkably different responses may be related to the soil nutrient status or species‐specific responses of leaf PRE to SAP (Huang et al, 2012; Li, Gao, et al, 2016; Lü et al, 2013; Lü & Han, 2010; Zhang, Tang, et al, 2015; Zheng et al, 2018; Zong et al, 2018).…”

Section: Discussionmentioning

confidence: 97%

“…Nutrient resorption is correlated with climate, tissue chemistry, and soil biology (Killingbeck, 1996; Ren et al, 2015; Yuan & Chen, 2009), all of which can be driven by N deposition (Wang et al, 2014; Zhang, Li, et al, 2015; Zheng et al, 2018). Increased use of fertilizers and enhanced N deposition have significantly increased soil nutrient availabilities (Bobbink et al, 2010; Galloway et al, 2004; Zhang, Li, et al, 2015) and leaf nutrient concentrations and thus influence the nutrient resorption patterns of plants.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, we conducted a 4‐year N fertilization experiment to investigate the responses of leaf nutrient resorption of two plant life forms to N addition in temperate shrublands. We tested the hypotheses that (1) N addition would have no effects on N resorption with the increase in soil available N, but (2) would increase P resorption, as plants suffer P shortages under the amendment of N. In addition, shrubs (deep‐rooted) tend to absorb nutrients from deep soil, whereas graminoids (shallow‐rooted) tend to utilize N from the upper soil (Zheng et al, 2018). Thus, we further hypothesized that (3) in terms of nutrient uptake and resorption, graminoids are more sensitive than shrubs to increased topsoil nutrient content.…”

Section: Introductionmentioning

confidence: 99%

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Nutrient resorption responses of plant life forms to nitrogen addition in temperate shrublands

et al. 2022

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Atmospheric nitrogen (N) deposition has significantly altered nutrient availability in most terrestrial ecosystems, which may affect plant nutrient resorption and hence change nutrient cycling and community composition. Although studies on the effects of changed soil nutrients on leaf nutrient resorption have been extensively reported in forests and grasslands, much less known about how plants in temperate shrublands respond to nitrogen deposition across the world. A 4-year N addition experiment in Vitex negundo and Spiraea trilobata shrublands was conducted to investigate the potential impacts of N deposition on nutrient resorption in two life forms. The green and senesced leaf N ([N] g and [N] s ) and phosphorus ([P] g and [P] s ) concentrations were measured in four shrubs and two graminoids to calculate N (NRE) and P (PRE) resorption efficiency. We found markedly lower NRE and PRE in shrubs than in graminoids, implying that shrubs probably have a higher capability of acquiring nutrients from soil, whereas graminoids rely on acquiring more nutrients via resorption. N addition increased the [N] g , [N] s , and N:P ratios ([N:P]) and decreased the [P] g of shrubs and all species, whereas it only increased [N] s but had negligible effects on the [N] g , [P] g , and [N:P] of graminoids. The [P] s , NRE, and PRE did not change in either life form or all species combined after N fertilization. Our results suggest that shrubs increase N uptake but do not alter internal N cycling (i.e., nutrient resorption), whereas graminoids do not change N acquisition strategies, in response to increased N supply from the soil. Continuous N addition exacerbated the P limitation of the shrub plants. Both shrubs and graminoids were more likely to adopt nearly complete utilization of P from the soil and senesced leaves under P deficiency, leading to a noneffect of N addition on leaf PRE. Our findings also suggest that the [N] g and [P] g responses to N addition are life-form specific, implying that N addition may affect ecosystem carbon (C) and nutrient cycles by altering the dominance values of the two life forms and community composition.

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Nitrogen enrichment alters nutrient resorption and exacerbates phosphorus limitation in the desert shrub Artemisia ordosica

Cited by 13 publications

References 59 publications

Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe

Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe

Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe

Nutrient resorption responses of plant life forms to nitrogen addition in temperate shrublands

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