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Article

Nutrient Resorption and C:N:P Stoichiometry Responses of a Pinus massoniana Plantation to Various Thinning Intensities in Southern China

by
Jun Jiang
1,2,
Yuanchang Lu
2,
Beibei Chen
1,2,
Angang Ming
3 and
Lifeng Pang
4,*
1
College of Forestry, Beijing Forestry University, Beijing 100083, China
2
Research Center of Forest Management Engineering of State Forestry and Grassland Administration, Beijing 100083, China
3
Experimental Center of Tropical Forestry, Chinese Academy of Forestry, Pingxiang 532699, China
4
Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
*
Author to whom correspondence should be addressed.
Forests 2022, 13(10), 1699; https://doi.org/10.3390/f13101699
Submission received: 19 September 2022 / Revised: 9 October 2022 / Accepted: 13 October 2022 / Published: 15 October 2022
(This article belongs to the Special Issue Forests Research in Beijing Forestry University: Commemorating the University’s 70th Anniversary)
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Abstract

Understanding the responses of C:N:P stoichiometry and nutrient resorption to thinning is essential to evaluate the effects of management practices on biogeochemical cycling in plantation forest ecosystems. However, nutrient resorption and C:N:P stoichiometry do not always respond in the same way to various thinning intensities, and the underlying mechanisms are not well understood. In this study, we aimed to examine the mechanisms underlying the impacts of thinning on C:N:P stoichiometry in a Pinus massoniana plantation, focusing on interactions among soils, plant tissues (leaves and litter), and soil properties. We conducted four different thinning treatments to determine the effects of thinning on the C:N:P stoichiometric ratios in leaves, litter, and soil in a Pinus massoniana plantation ecosystem. Thinning significantly increased the C, N, and P content of leaves, litter, and soil (p < 0.05). The effects of thinning on C:N:P stoichiometry varied strongly with thinning intensity. Specifically, thinning significantly decreased all C:N:P stoichiometry except leaf N:P and litter C:N (p < 0.05). The N resorption efficiency (NRE) showed no significant change, but thinning significantly decreased the P resorption efficiency (PRE, p < 0.05). This suggests that thinning has inconsistent impacts on N and P cycling in Pinus massoniana plantations. In addition, these different responses suggest that soil physicochemical processes play a crucial role in regulating the effects of thinning. Thinning intensity regulates the biogeochemical cycles of C, N, and P in Pinus massoniana plantation ecosystems by affecting nutrient resorption and soil physicochemical processes. The inconsistent results obtained can be attributed to the complexities of stand environments and the redistribution of site resources following thinning. Therefore, incorporating the effects of thinning intensity into nutrient cycling models may improve predictions related to achieving long-term forest management strategies.
Keywords: thinning intensity; Pinus massoniana plantation; C:N:P stoichiometry; nutrient resorption efficiency thinning intensity; Pinus massoniana plantation; C:N:P stoichiometry; nutrient resorption efficiency

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MDPI and ACS Style

Jiang, J.; Lu, Y.; Chen, B.; Ming, A.; Pang, L. Nutrient Resorption and C:N:P Stoichiometry Responses of a Pinus massoniana Plantation to Various Thinning Intensities in Southern China. Forests 2022, 13, 1699. https://doi.org/10.3390/f13101699

AMA Style

Jiang J, Lu Y, Chen B, Ming A, Pang L. Nutrient Resorption and C:N:P Stoichiometry Responses of a Pinus massoniana Plantation to Various Thinning Intensities in Southern China. Forests. 2022; 13(10):1699. https://doi.org/10.3390/f13101699

Chicago/Turabian Style

Jiang, Jun, Yuanchang Lu, Beibei Chen, Angang Ming, and Lifeng Pang. 2022. "Nutrient Resorption and C:N:P Stoichiometry Responses of a Pinus massoniana Plantation to Various Thinning Intensities in Southern China" Forests 13, no. 10: 1699. https://doi.org/10.3390/f13101699

APA Style

Jiang, J., Lu, Y., Chen, B., Ming, A., & Pang, L. (2022). Nutrient Resorption and C:N:P Stoichiometry Responses of a Pinus massoniana Plantation to Various Thinning Intensities in Southern China. Forests, 13(10), 1699. https://doi.org/10.3390/f13101699

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