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Growth versus storage: response of Pinus tabuliformis and Quercus mongolica seedlings to variation in nutrient supply and its associated effect on field performance

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Abstract

Carbohydrate and nitrogen storage in seedlings can improve field growth and survival. However, carbohydrate and nitrogen reserves may compete. For instance, carbohydrate reserves can be accumulated due to sink limitation on growth triggered by nutrient deficiency. Few studies have addressed the effects of nutrient supply on carbohydrate and nutrient storage and subsequent field performance of Quercus and Pinus species with different shoot growth strategies at the early growing stage. We exposed seedlings of Pinus tabuliformis Carr and Quercus mongolica Fisch to three exponential fertilizer treatments (10, 50, 100 mg N) in the nursery for 18 weeks to assess the combined response of growth and storage of carbohydrate and nitrogen in seedlings during their first year of growth in the nursery, as well as their subsequent field performance over the next 2 years. At the end of nursery stage, high nutrient supply increased nitrogen storage in both species, increased carbohydrate concentration in Q. mongolica but decreased that in P. tabuliformis seedlings. P. tabuliformis showed higher winter mortality than Q. mongolica but field mortality of P. tabuliformis decreased with an increase in fertilizer dosage. Our findings suggest that P. tabuliformis seedlings exposed to 100 mg N per plant can mitigate the field winter mortality although it could be still under deficiency status. Given lower winter mortality in Q. mongolica seedlings, being exposed to at least 100 mg N per plant in the nursery can produce nutrient-loaded seedlings, and therefore can be considered for restoration programs in areas affected by low winter temperature.

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (32171764).

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Correspondence to Guolei Li.

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Appendix

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Fig. 5
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Schedule of fertilizer treatments

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Fig. 6
figure 6

Vector nomograms of relative changes in dry weight, nutrient content, and nutrient concentration occurring at the level of whole plant of seedling cultured under three fertilization regimes (10 mg, 50 mg and 100 mg N supply). Seedling status treated with 10 mg N is normalized to 100. Arrows reflect progressions in increase of fertilizer doses from 10 to 50 mg and 100 mg N supply, respectively. Note differences in axis scale between Pinus tabuliformis and Quercus mongolica

6 and Tables

Table 3 Seed traits of Pinus tabuliformis and Quercus mongolica

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Table 4 Effect of fertilization on nitrogen and carbohydrate concentration in Pinus tabuliformis and Quercus mongolica seedlings cultivated in the nursery

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Table 5 regression between plant nitrogen and TNC reserves with field growth and survival, respectively

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Table 6 Number of days with extreme freezing temperatures and precipitation at the outplanting site during the winter of 2018

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Luo, N., Wei, N. & Li, G. Growth versus storage: response of Pinus tabuliformis and Quercus mongolica seedlings to variation in nutrient supply and its associated effect on field performance. New Forests 55, 81–99 (2024). https://doi.org/10.1007/s11056-023-09966-w

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