Effects of understory removal and thinning on water uptake patterns in Pinus massoniana Lamb. plantations: Evidence from stable isotope analysis

Wang, Ting; Xu, Qing; Zhang, Beibei; Gao, Deqiang; Zhang, Ying; Ren, Ranran; Jiang, Jing

doi:10.1016/j.foreco.2021.119755

Cited by 14 publications

(4 citation statements)

References 54 publications

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“…Afforestation is a very successful method for preventing soil degradation, improving the ecological environment, and promoting the restoration of damaged ecosystems ( Ren et al, 2017 ; Behzad et al, 2022 ; Wang et al, 2022c ). Nevertheless, nutrient element balance in hydro-fluctuation zone vegetation restoration has often been ignored.…”

Section: Introductionmentioning

confidence: 99%

Plant-soil interactions and C:N:P stoichiometric homeostasis of plant organs in riparian plantation

Ding

Arif²,

Liu³

et al. 2022

Front. Plant Sci.

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Carbon (C), nitrogen (N), and phosphorus (P) stoichiometric ratios give valuable insight into ecosystem function. The purpose of the present study is to probe into the C, N, and P stoichiometric characteristics in various organs and their relationships with soil factors of the dominant deciduous conifer plant species (Taxodium ascendens and Taxodium distichum) during afforestation in the riparian zone of Three Gorges Reservoir. The results showed only a small change in the concentration of C in different plant organs and soils. T. ascendens contained mean N and P concentrations of 7.63 and 1.54 g/kg in fine roots, 5.10 and 0.56 g/kg in stems, and 15.48 and 2.30 g/kg in leaves, respectively. Whereas T. distichum had a mean N and P concentration of 7.08 and 1.37 g/kg in fine roots, 4.84 and 0.59 g/kg in stems, and 16.89 and 2.23 g/kg in leaves. The N:P ratios in all organs were below 14, indicating that N may have inhibited tree growth. The fine roots P and N:P of T. distichum were weak plasticity and weak homeostasis, and those of T. ascendens were plasticity and weak plasticity. Their stems and leaves adhere to strict homeostasis. N concentrations were significantly positively related to P concentrations in every tissue (except the stems of T. ascendens), and C concentrations were significantly positively associated with P concentrations in the stems and leaves of T. ascendens and T. distichum (p < 0.05). Likewise, soil P and fine root P were positively associated (p < 0.01). This study contributes to the understanding of deciduous conifer plant stoichiometry. It demonstrates N, P, and N:P stoichiometric homeostasis in T. ascendens and T. distichum, which can withstand flooding and are suitable for vegetation restoration in the hydro-fluctuation zone.

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Section: Introductionmentioning

confidence: 99%

Plant-soil interactions and C:N:P stoichiometric homeostasis of plant organs in riparian plantation

Ding

Arif²,

Liu³

et al. 2022

Front. Plant Sci.

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“…Bebre et al ( 2021 ) emphasized that plants may employ a trade-off among organs by changing stem biomass to adapt to the light intensity. Undoubtedly, changes in environmental factors are caused by disturbances in the structure of the forest stand and the overall forest ecosystem (Wang et al, 2022b ). Since environmental factors can affect biomass allocation among plant organs (Poorter et al, 2012 ), the spatial structure will also affect it.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Pinus massoniana is among the main species used for vegetation restoration and wood utilization due to its strong adaptability, rapid growth rate, and high yield in China (Wang et al, 2022b ). Nonetheless, P. massoniana may suffer problems in the regeneration of its seedlings due to unreasonable logging and extensive managements with low nutrient inputs in large areas (Wang et al, 2022b ). To explore the growth and biomass allocation in naturally regenerated seedlings and understand the direct or indirect role of factors pertaining to stand structure in biomass allocation, we measured tree growth, biomass accumulation, and biomass allocation in current-age seedlings after selective logging and established SEMs among the stand structure factors, environmental factors, and biomass allocation in seedlings.…”

Section: Introductionmentioning

confidence: 99%

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Stand structure adjustment influences the biomass allocation in naturally generated Pinus massoniana seedlings through environmental factors

Wang²,

Wang³

et al. 2022

Front. Plant Sci.

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The natural regeneration of seedlings is a key factor for forest succession. Nevertheless, studies explaining the mechanism of growth and biomass allocation in regenerated seedlings after disturbance are lacking. Therefore, we measured the growth, biomass accumulation, and biomass allocation in current-age seedlings of Pinus massoniana after selective logging (logging of competitive trees, LCT; logging of inferior trees, LIT; and unlogged control, CK), and established structural equation models (SEMs) among the spatial structure characteristic indexes of the stand, environmental factors, and biomass allocation in different organs. As compared to the CK, the mingling index (M), uniform angle index (W), opening degree (O), soil organic carbon (SOC), available nitrogen (SAN), available phosphorus (SAP), available potassium (SAK), and bulk density (SBD) significantly increased (p < 0.05), while the competition index (CI) and neighborhood comparison (U) significantly decreased after logging (p < 0.05). After the LCT, seedling branch biomass improved, with an increase in the ground-diameter, crown-root ratio, and seedling quality index. More biomass was allocated to foliage and roots by an increase in the height and height-diameter ratio under the LIT. In the CK, increasing stem biomass helped the seedlings absorb and utilize more light. The Pearson correlation coefficient showed that biomass allocation to organs was independent, and seedlings adopted the strategies of heterogeneous adaptation and growth, thereby resulting in the separation of the allocation patterns among the organs. As per the redundancy analysis (RDA), CI was the main factor in biomass allocation. Environmental factors had direct effects on biomass allocation to organs, while the stand spatial structure characteristic indexes had indirect effects on biomass allocation based on SEMs. In summary, the LCT had significant, albeit indirect, effects on SOC, SAN, and SBD by reducing the CI for the regeneration and growth of seedlings in the stand, which was of great significance to the sustainable development of the forest stand of P. massoniana.

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Isotopic Mass Spectrometry in Food and Environmental Chemistry

Picó

Barceló

2022

The Handbook of Environmental Chemistry

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Effects of understory removal and thinning on water uptake patterns in Pinus massoniana Lamb. plantations: Evidence from stable isotope analysis

Cited by 14 publications

References 54 publications

Plant-soil interactions and C:N:P stoichiometric homeostasis of plant organs in riparian plantation

Plant-soil interactions and C:N:P stoichiometric homeostasis of plant organs in riparian plantation

Stand structure adjustment influences the biomass allocation in naturally generated Pinus massoniana seedlings through environmental factors

Isotopic Mass Spectrometry in Food and Environmental Chemistry

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