Precommercial Thinning of <i>Picea mariana</i> and <i>Pinus banksiana</i>: Impact of Treatment Timing and Competitors on Growth Response

Splawinski, Tadeusz Bartek; Drobyshev, Igor; Gauthier, Sylvie; Bergeron, Yves; Greene, David F.; Thiffault, Nelson

doi:10.5849/forsci.15-178

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…Reasonable adjustment of spatial stand structure is a meaningful way to maintain sustainable forest management 28 . Thinning could improve the overall vitality of trees, thus producing a specific feedback effect on the biological and nonbiological factors of the environment 4,29 . Many studies have concluded that the stand after thinning does have growth advantages in various aspects compared with the stand with original density [30][31][32][33] .…”

Section: Discussionmentioning

confidence: 99%

Effects of thinning on soil nutrient availability and fungal community composition in a plantation medium-aged pure forest of Picea koraiensis

Zhao

Nier

Wang

et al. 2023

Sci Rep

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Thinning is an important silvicultural practice for improving the productivity and wood production in plantation forest. Different intensities of thinning management can affect tree growth and alter soil nutrient effectiveness, thus affecting soil fungal community structure and diversity. Our objective is to determine the soil factors and their regulatory mechanisms that influence stand growth by thinning, and to provide data to support the establishment of large diameter timber cultivation technology for Picea koraiensis. In this study, we conducted medium- and high-intensity thinning in 43a P. koraiensis plantation middle-aged forests and investigated the growth indexes, soil physicochemical properties, and fungal community diversity in rhizosphere and non-rhizosphere soils of the stands after thinning at different densities (904 plants/ha for control, 644 plants/ha for 30% thinning intensity, and 477 plants/ha for 50% thinning intensity). The results showed that all growth indicators (annual growth of tree height, diameter at breast height, height under live branches and crown width) of the plantation after high-intensity thinning (477 plants/ha) were higher than those of the control (no thinning, significant) and medium-intensity thinning (644 plants/ha). Mycorrhizal infection rate was higher at the beginning of the growing season than at the end of the growing season, and increased slightly with decreasing stand density. Compared to the control, all medium- and high-intensity thinning treatments significantly improved soil nutrient content (P < 0.05), including total carbon, total nitrogen, total phosphorus, total potassium, Available phosphorus and Available potassium. Fungal diversity was higher but lower in abundance than the control in both rhizosphere and non-rhizosphere soils after thinning. The number of OTUs and fungal richness and diversity indices of non-rhizosphere soil fungi were higher than those of rhizosphere soil fungi. In conclusion, this study provides new evidence that reasonable intercalation can increase the radial and vertical growth of P. koraiensis plantation forests and promote the diversity of subsurface soil fungal communities. It is shown that thinning intensity regulates biogeochemical cycles in P. koraiensis plantation ecosystems by affecting soil nutrients and fungal community structure. Therefore, 50% thinning intensity can be used to increase timber production in plantation forests during large diameter timber cultivation of P. koraiensis and improve predictions associated with achieving long-term forest management strategies.

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Section: Discussionmentioning

confidence: 99%

Effects of thinning on soil nutrient availability and fungal community composition in a plantation medium-aged pure forest of Picea koraiensis

Zhao

Nier

Wang

et al. 2023

Sci Rep

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“…The crushed logging residues have a larger contact area with the soil, and the loose, broken shape of the residue removes the physical protection provided by the bark, which aids in the decomposition of the harvest residue and releases the elemental carbon 27,28 . Additionally, fungi are crucial to the breakdown of logging residues 15,29 , and smashed logging residues are more favorable for establishing fungal mycelia and decomposition of logging residues 30 . As a result of these processes, the carbon content of the logging residue signi cantly decreased (p < 0.05) (Fig.…”

Section: Decomposition Of Logging Residuesmentioning

confidence: 99%

Addition of logging residues short-term affects basic soil parameters and soil organic carbon in six types of urban plantations

Xing

Zhang

Tang

et al. 2023

Preprint

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Different treatments of logging residues can impact on the forest soil carbon pool, but the short-term effects are still unclear. This study aimed to the relationship between the changes of the addition of logging residues and different tree species soil organic carbon content and basic soil parameters. The experimental site was located in Harbin, China, and four logging residue addition levels were set under six forest types, converted to carbon added as 0, 250 (low carbon addition, LC), 500 (medium carbon addition, MC) and 1000 (high carbon addition, HC) g/m2. In the short-term (five months), the logging residues partially decomposed, but the effect on basic soil parameters was small. Soil organic carbon, microbial carbon, and dissolved organic carbon increased significantly in the 0–10 cm soil layer for some tree species, and not significantly in the 10 –20 cm soil layer. There is no consistent relationship between the addition of logging residues and soil parameters under different tree species. That adding logging residues could increase soil carbon pool, there were treespeciesspecific differences in the dynamics of soil processes.

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Effects of precommercial thinning intensity on growth of Fagus orientalis Lipsky stands over 6 years

et al. 2021

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Precommercial Thinning of Picea mariana and Pinus banksiana: Impact of Treatment Timing and Competitors on Growth Response

Cited by 7 publications

References 17 publications

Effects of thinning on soil nutrient availability and fungal community composition in a plantation medium-aged pure forest of Picea koraiensis

Effects of thinning on soil nutrient availability and fungal community composition in a plantation medium-aged pure forest of Picea koraiensis

Addition of logging residues short-term affects basic soil parameters and soil organic carbon in six types of urban plantations

Effects of precommercial thinning intensity on growth of Fagus orientalis Lipsky stands over 6 years

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