Photosynthetic capacity, nutrient and water status following precommercial thinning in Anatolian black pine

Deligöz, Ayşe; Bayar, Esra; Karatepe, Yasin; Genç, Musa

doi:10.1016/j.foreco.2019.117533

Cited by 3 publications

(4 citation statements)

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“…Needle K concentrations decreased not significantly with needle age in P. pinaster but significantly in P. radiata, as also reported for P. taeda (Zhang & Allen 1996). Although increased foliar K levels are more frequent in thinned plots (Hokka et al 1996, Thibodeau et al 2000, Lopez-Serrano et al 2005, Deligöz et al 2019, we only found a significant increase in current year P. pinaster needles from selection thinning plots, the increment being not significant in 1-year-old needles, thus agreeing with the findings by Lopez-Serrano et al (2005). Moreover, the lack of significant changes in needle K in our P. radiata stands and two of the three thinning treatments in P. pinaster agreed with the results of Chase et al (2016) and Piatek et al (2017) and showed that thinning has little effect on foliar K nutrition, at least in stands without K deficiency as in our case.…”

Section: Discussionsupporting

confidence: 76%

“…In our stands, neither needle age nor thinning treatment impacted on the P concentration of P. radiata needles, agreeing with the results of Piatek et al (2017), but both factors affected it in P. pinaster. In the latter species, the increase of foliar P concentration in thinned plots shows the beneficial effects of thinning in P nutrition which has been already reported by many authors (Mugasha et al 1991, Hokka et al 1996, Thibodeau et al 2000, Lopez-Serrano et al 2005, Chase et al 2016, Deligöz et al 2019.…”

Section: Discussionsupporting

confidence: 75%

“…To assess the effects of thinning on N cycling, both the leaf N concentration (Inagaki et al 2008) and the foliar δ 15 N have been employed (Bai et al 2017, Yan et al 2018. Nonetheless, studies about the impacts of pre-commercial thinning or thinning on foliar micronutrient status are more recent and still scarce (Chase et al 2016, Piatek et al 2017, Deligöz et al 2019.…”

Section: Introductionmentioning

confidence: 99%

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Age and thinning effects on elemental composition of Pinus pinaster and Pinus radiata needles

Gómez-Rey¹,

Couto-Vázquez²,

González-Prieto³

2021

iForest

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The information about the impacts of thinning on the availability of micro-nutrients, as well as macro-nutrients other than N, P and K, is still scarce. We assessed the changes in the concentrations of 12 elements (Al, B, Ca, Cu, Fe, K, Mg, Mn, N, Na, P and Zn) with needle age (current year or 1-year-old) and three early thinning treatments in two of the most widely distributed pines in SW Europe: P. pinaster and P. radiata. Four treatments were setup in triplicate: control (C), light thinning (LT), heavy thinning (HT) and selection thinning of dominant trees (ST), with 0%, 10%, 20% and 20% of total basal area removed, respectively. Needle δ 15 N varied little with needle age and most thinning treatments in both species, but ST triggered an increase of N in P. pinaster needles. Needle Ca and Na increased with age, but were unaffected by treatment. Foliar K, Zn and Cu decreased with age in both species and increased with ST only in P. pinaster. Jointly considering all treatments, there was no needle age effect on Mn concentration, neither in P. radiata nor in P. pinaster, but in the latter species Mn levels increased with age in the selection thinning plots. There were significant thinning effects on Mn levels in both P. pinaster (ST>C) and P. radiata (HT > LT, ST). Foliar Fe and Al concentration increased with age in both pines; the former increased with ST only in P. pinaster while the latter was affected by thinning only in current year needles and without a clear tendency. Neither age nor treatment effects on needle Mg and B were found, while for P needle age had a significant effect only in P. pinaster.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Age and thinning effects on elemental composition of Pinus pinaster and Pinus radiata needles

Gómez-Rey¹,

Couto-Vázquez²,

González-Prieto³

2021

iForest

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“…The total rainfall between May and September was 277 mm in 2015, 258.7 mm in 2016, and 131 mm (from May until the 6 th September) in 2017, with 170.2 mm (May) of the highest monthly rainfall in 2016 (Figure 1). According to the long-term climate data of Gölhisar Meteorological Station, the study area had an annual total rainfall of 1 276 mm and an average temperature of 12.1 °C (Deligöz et al 2019).…”

Section: Methodsmentioning

confidence: 99%

Differences in water relations and total carbohydrate content between precommercially thinned and unthinned Pinus nigra subsp. pallasiana stands

Deligöz¹,

Bayar²,

Genç³

et al. 2021

J. For. Sci.

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Variations in seasonal responses in water relations and total carbohydrate content (TCC) in one-yearold shoots from precommercially thinned (PCT) and unthinned Anatolian black pine stands were assessed during three seasons (sampling in May, July and September) in 2015–2017. Three different treatments were established: unthinned control with 4 941 stems·ha–1 and two thinned spacing levels (2–2.5 and 3–3.5 m) where 2 133 stems·ha–1 and 1 093 stems·ha–1 were left, respectively. Differences in osmotic potential at turgor loss point (ΨπTLP) between the thinned and unthinned plots appeared only during a water shortage (September) in the second season, with the thinned stands showing lower ΨπTLP than the unthinned stands. Seasonal variation in terms of ΨπTLP was detected in the 3–3.5 m spacing trees. PCT were effective on osmotic potential at full turgor (Ψπ100), relative water content (RWC), symplastic water at saturated point per dry weight of the shoot and dry weight fraction. In both the thinned and unthinned plots, a gradual decline was observed in RWC from May to September in all three years. Generally, although TCC was found to be higher in the 3–3.5 m spacing, control plots were also high in carbohydrates in some periods. Results reflect the ability of this species to survive in changing environments by PCT during dry periods in the three studied seasons. Although PCT has an effect on water potential components and TCC, it is not clear exactly how effective the PCT density is in osmotic adjustment.

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Light transmittance and understory junipers influence the survival and growth of seedlings and litter decomposition in black pine forests

Kara,

Çiftci,

Savacı

2023

New Forests

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Photosynthetic capacity, nutrient and water status following precommercial thinning in Anatolian black pine

Cited by 3 publications

References 61 publications

Age and thinning effects on elemental composition of Pinus pinaster and Pinus radiata needles

Age and thinning effects on elemental composition of Pinus pinaster and Pinus radiata needles

Differences in water relations and total carbohydrate content between precommercially thinned and unthinned Pinus nigra subsp. pallasiana stands

Light transmittance and understory junipers influence the survival and growth of seedlings and litter decomposition in black pine forests

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