Thinning experiments in narrow-leaved ash (Fraxinus angustifolia Vahl.) plantations: 10-year results

Özbayram, Ali Kemal; Çiçek, Emrah

doi:10.1007/s11056-018-9642-8

Cited by 9 publications

(10 citation statements)

References 25 publications

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“…Aralama sonrası kalan meşceredeki ağaçlar daha fazla çap yaparak, kontroldeki ağaçların yaptığı göğüs yüzeyi artımını yakalamıştır. [11,20,21,34,35].…”

Section: B Yöntemunclassified

“…Meşcere özelliklerine göre zamanında ve düzenli şekilde yapılacak bakımlar kaliteli ve kalın çaplı odun ürünü üretimi için kullanılabilecek en önemli silvikültürel araçtır. Aşırı gövde sıklığı ve gövde ayrılmasından kaynaklanan artım kayıplarını en aza indirmek ve ormanların canlılığını ve çeşitliliği korumak için aralama müdahaleleri zorunludur [9][10][11][12]. Diğer yandan; yetişme ortamı, ağaç türü ve meşcere kuruluş özelliklerine bağlı olarak, farklı şiddetlerde uygulanacak aralamalar, meşcere kuruluşu ve gelişimi yanında ağaçların biçimi ve gelişimi ile meşcere sağlığı, toprak özellikleri ve meşcerenin gelecekteki gençleştirme koşulları üzerine büyük ölçüde etkili olduğu ifade edilmektedir [12].…”

Section: Introductionunclassified

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Kestane Baltalıklarında Aralamaların Büyümeye Kısa Süreli Etkileri

Özbayram¹,

Seçgin²

2020

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

Self Cite

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Türkiye'nin önemli orman ağaçlarından biri olan Anadolu kestanesi (Castanea sativaMill.) geniş alanlarda saf ve karışık meşcereler kurmaktadır. Kestane biyolojisine aykırı uygulamalar ve çeşitli hastalıklar nedeniyle koru kestane ormanlarının vasfı bozulmuş, birçok yerde baltalık vasıflı işletilmesi silvikültürel seçenek haline gelmiştir. Aralama, ormanların işletilmesinde kullanılan en önemli silvikültürel müdahalelerden biridir. Bu çalışmanın amacı Gölcük (Kocaeli) yöresi 15 yaşındaki kestane baltalıklarında aralama şiddetinin çap, göğüs yüzeyi ve hacim ile bunların artımlarına bir yıllık etkilerini değerlendirmektir. Aralama denemesi rastlantı blokları deneme desenine göre üç tekrarlı kurulmuş ve dört farklı aralama şiddeti uygulanmıştır. Aralama öncesi meşcere ağaç sayısı, orta çapı, göğüs yüzeyi ve hacmi sırasıyla 4936 adet, 8.73 cm, 30.71 m 2 ha-1 ve 163.68 m 3 ha-1 'dı. Aralama ile göğüs yüzeyinin % 0 (kontrol), % 18'si (mutedil), % 34'ü (şiddetli) ve % 49'u (çok şiddetli) meşcereden çıkartılmıştır. Aralamanın bir yıllık sonuçlarına göre; aralama şiddeti arttıkça çap artımı artmakta, buna bağlı olarak aralanan parseller kontrol kadar göğüs yüzeyi ve hacim artımı yapmışlardır. Çok şiddetli aralanan meşceredeki çap artımı kontrolün iki katı kadardır. Aralama şiddetine bağlı olarak başlangıç çap sınıfları arttıkça çap artımı da artmıştır. Aralamanın büyümeye etkisi bağlamında daha uzun süreli sonuçlara ihtiyaç duyulmakla birlikte, ulaşılan bir yıllık sonuçlara göre benzer özellikteki kestane baltalıklarında çok kuvvetli aralamalar önerilebilir.

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“…Aralama sonrası kalan meşceredeki ağaçlar daha fazla çap yaparak, kontroldeki ağaçların yaptığı göğüs yüzeyi artımını yakalamıştır. [11,20,21,34,35].…”

Section: B Yöntemunclassified

Section: Introductionunclassified

Kestane Baltalıklarında Aralamaların Büyümeye Kısa Süreli Etkileri

Özbayram¹,

Seçgin²

2020

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

Self Cite

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“…Both thinning and mixing can have a profound impact on forest dynamics, and are conducive to the formation of forest structure and species diversity (Kint et al 2003, Felton et al 2010, Taki et al 2010, Wu et al 2018, Harrington 2020. Most previous studies have explored the characteristics of plant species diversity, growth (Sun et al 2015, Ozbayram & Ciçek 2018, carbon storage (Zhang et al 2019), photosynthesis (Li et al 2017a), soil nutrient cycles, microbial diversity (Feng et al 1988, Sheng & Xue 1992, Wang et al 2010, Ye et al 2018, and small animals such as insects and birds (Felton et al 2010, Taki et al 2010 in the period immediately after plantations were thinned or mixed. Only a few studies have considered the spatial structure of plantations at stand level (Crecente-Campo et al 2009, Potvin & Dutilleul 2009, Zheng et al 2017.…”

Section: Introductionmentioning

confidence: 99%

Long-term effects of thinning and mixing on stand spatial structure: a case study of Chinese fir plantations

Li¹,

Xu²,

Wang³

et al. 2021

iForest

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The regular planting and periodic harvesting of a single tree species are features of plantations, which are associated with a reduction of biodiversity. Such plantations are strongly encouraged to be converted into mixed forests. However, the spatial structure dynamics of plantations during the conversion process are poorly understood. In subtropical regions, thinned forest of Chinese fir (Cunninghamia lanceolata [Lamb.] Hook.) and mixed forest of Chinese fir and Michelia macclurei Dandy are considered two ideal modes of plantation management. In this study, we analyzed the spatial structure dynamics of two forest stands and their six main tree populations over a rotation of 27 years, using spatial point analyses. We found that Chinese fir and M. macclurei had a regular distribution pattern (scale, r = 0-1 m) in the early stages of planting (1993), and Chinese fir maintained this pattern after experiencing self-thinning and selective cutting. In addition, non-planted tree species (i.e., natural regeneration of late-seral species, NRLSS) displayed significantly intraspecific clumping, which resulted in the distribution patterns of the forest stands changing from regular to aggregated (r = 0-5.5, 1-20 m), and the species distribution of mixed forest changed from random to clumped (r = 0-20 m). Moreover, during the management period (1993-2018), individuals were significantly differentiated in terms of size, and some small trees in the thinned forest were aggregated together. For the NRLSS, the diameter at breast height was randomly distributed (r = 0-20 m). Furthermore, Chinese fir and M. macclurei were separated at r = 0-1 m in the planting stage, but any pair of the six main populations in the thinned forest and mixed forest were randomly correlated over a rotation. Finally, the nearest neighbor distance of the stands became shorter after conversion, while the values for Chinese fir increased. After 25 years, the mixed plantation and the thinned plantation had a complex spatial structure. They develop towards natural forests and could be used as a template for future plantation management.

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“…Selective thinning through human intervention is a vital management measure for adjusting forest density and, as such, it has been widely implemented in forestry production [1][2][3][4][5]. It can directly or indirectly influence changes in the microclimatic conditions of forest stands, such as light levels, temperature, and water content [6][7][8], as well as the stocks and dynamics of soil organic carbon [9].…”

Section: Introductionmentioning

confidence: 99%

Effects of Thinning on Microbial Community Structure in the Organic Horizon of Chinese Pine Plantations in Badaling, Beijing, China

GuangLiang¹,

Sun

Yang

et al. 2019

Forests

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Research Highlights: Moderate thinning can effectively improve forestry production and change the microenvironment of understory vegetation. Background and Objectives: Microbial communities control the decomposition and transformation of forest organic matter; however, the influence of thinning on microbes in the organic horizon remains unclear. Materials and Methods: In this study, we subjected four plots of Chinese pine plantations in Badaling, Beijing to different thinning intensities, including no thinning (T0), low-intensity thinning (T10), medium-intensity thinning (T20), and high-intensity thinning (T50). The changes in chemical properties and microbial community compositions observed in the organic horizon, which comprised undecomposed litter (L layer) and half-decomposed litter (F layer), were analyzed after thinning. Microbial community compositions were evaluated using phospholipid fatty acid (PLFA) methods. Results: The results showed that the abundances of gram-negative bacteria (GN) and total bacteria (B) under the T10 thinning condition were the highest among the four thinning intensities, and the abundance of arbuscular mycorrhizal fungi (AMF) in T20 was higher than under other thinning intensities. The abundance of gram-positive bacteria (GP) and actinobacteria (ACT) in T10 was lower than in both T0 and T50. The abundance of total PLFAs and fungi (FU) was higher in the L layer, whereas the abundance of GP, GN, B, ACT, and AMF was higher in the F layer. Conclusions: Our results demonstrated that the L layer better reflects the influence of thinning on litter. Redundancy analysis (RDA) results indicated that the organic carbon (LOC) , dissolved organic carbon (DOC), and ammonium nitrogen (NH4+-N)contents of litter were primarily responsible for the observed changes in microbial community structure, with LOC alone explaining 62.6% of the total variance among the litter substrate factors selected. Overall, moderate-intensity thinning of Pinus tabulaeformis Carr. plantations created more favorable conditions for microbial communities in the organic horizon.

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Thinning experiments in narrow-leaved ash (Fraxinus angustifolia Vahl.) plantations: 10-year results

Cited by 9 publications

References 25 publications

Kestane Baltalıklarında Aralamaların Büyümeye Kısa Süreli Etkileri

Kestane Baltalıklarında Aralamaların Büyümeye Kısa Süreli Etkileri

Long-term effects of thinning and mixing on stand spatial structure: a case study of Chinese fir plantations

Effects of Thinning on Microbial Community Structure in the Organic Horizon of Chinese Pine Plantations in Badaling, Beijing, China

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