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Gheorghe Spârchez
Department of Forest Engineering, Forest Management Planning and Terrestrial Measurements, Faculty of Silviculture and Forest Engineering, “Transilvania” University, Ludwig van Beethoven Str., 500123 Brașov, Romania

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Journal article
Published: 28 April 2021 in Forests
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Research Highlights: This study highlighted the possibility of estimating the productivity of mountain sites (mixed beech-coniferous stands) based on tree and stand dendrometric characteristics. Background and Objectives: The mountainous region of Romania offers suitable conditions for the formation and development of mixed beech-coniferous stands with complex, multi-aged structures. Based on the dendrometric characteristics of the trees, established indicators were used to estimate the productivity of the sites, with other quantitative indicators being proposed to better capture the particularities of mixed multi-aged stands. Materials and Methods: To evaluate the productive potential of the sites, a combined in situ mapping method was applied. Laboratory analyses of soils, and information provided indirectly by indicator plant and tree overstories, led to the characterization of soil types and the identification of forest sites for study. The productivity of the sites was estimated using quantitative indicators established based on the dendrometric characteristics of the trees and stands. Results: Indicators based on stand production and growth are relevant for multi-aged stands of mixed beech-coniferous formation. The ratio between tree volume and the basal area is the result of basal area and height increments, both of which are variable and depend on the quality of the site. Thus, a form height stand can be used as an indicator to characterize the productivity of the site in mixed multi-aged stands. Conclusions: Knowing the ecological specificity of sites in the formation of mixed beech-coniferous forests is a first condition necessary to achieving stable stands that are able to continuously fulfill multiple functions. The favorability of forest sites for a certain assortment of species is a fundamental character of the sites, which is essential for the management of these forest formations.

ACS Style

Avram Cicșa; Gheorghe-Marian Tudoran; Maria Boroeanu; Alexandru-Claudiu Dobre; Gheorghe Spârchez. Estimation of the Productivity Potential of Mountain Sites (Mixed Beech-Coniferous Stands) in the Romanian Carpathians. Forests 2021, 12, 549 .

AMA Style

Avram Cicșa, Gheorghe-Marian Tudoran, Maria Boroeanu, Alexandru-Claudiu Dobre, Gheorghe Spârchez. Estimation of the Productivity Potential of Mountain Sites (Mixed Beech-Coniferous Stands) in the Romanian Carpathians. Forests. 2021; 12 (5):549.

Chicago/Turabian Style

Avram Cicșa; Gheorghe-Marian Tudoran; Maria Boroeanu; Alexandru-Claudiu Dobre; Gheorghe Spârchez. 2021. "Estimation of the Productivity Potential of Mountain Sites (Mixed Beech-Coniferous Stands) in the Romanian Carpathians." Forests 12, no. 5: 549.

Journal article
Published: 17 April 2018 in Forests
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More than a third of Romania’s surface has low-productive soils, at the same time exposed to risks of climatic phenomena and generating high economic loss. Afforestation with pine has been the most common solution for the recovery of sheet erosion. Many of the pines grown on such land have run down. This paper presents the results of the first dendroecological investigation of degraded lands in Romania, 80 years after the first ecological reconstruction. In this way, the effects of reconstruction were assessed, supporting the adoption of future solutions for the improvement and efficiency of recovered ecosystems. Reconstructed radial growth was set against rainfall, air temperature, and management history. A total of 330 black pine and Scots pine trees (Pinus sylvestris L. and Pinus nigra Arn.) of different ages and social positions from 11 stands of different densities were cored for retrospective tree-ring analysis. Scots pine has made better use of these sites, with a better growth rate than black pine especially in plantations with lower survival and on dominant trees. The dynamics of radial growth distinguish the two pine species, with Scots pine showing an accentuated juvenile growth spurt and bigger growth range. The growth decline is predominantly a maturation effect that begins when the tree is around 40 years old and seems to be irreversible. After this age, weak or moderated removal is not enough to revive growth. The contribution of climate (air temperature and rainfall) to the last radial increments in decline is 3–57% and is higher than in the previous decades. On moderately degraded land by farming and grazing, the mixture of Scots pine and black pine, rather than monocultures, proved to be a sustainable solution. Dendrochronological surveying of restored ecosystems allows development of management strategies, which becomes critically important in the circumstances of climate warming.

ACS Style

Ciprian Valentin Silvestru-Grigore; Florin Dinulică; Gheorghe Spârchez; Aureliu Florin Hălălișan; Lucian Constantin Dincă; Raluca Elena Enescu; Vlad Emil Crișan. Radial Growth Behavior of Pines on Romanian Degraded Lands. Forests 2018, 9, 213 .

AMA Style

Ciprian Valentin Silvestru-Grigore, Florin Dinulică, Gheorghe Spârchez, Aureliu Florin Hălălișan, Lucian Constantin Dincă, Raluca Elena Enescu, Vlad Emil Crișan. Radial Growth Behavior of Pines on Romanian Degraded Lands. Forests. 2018; 9 (4):213.

Chicago/Turabian Style

Ciprian Valentin Silvestru-Grigore; Florin Dinulică; Gheorghe Spârchez; Aureliu Florin Hălălișan; Lucian Constantin Dincă; Raluca Elena Enescu; Vlad Emil Crișan. 2018. "Radial Growth Behavior of Pines on Romanian Degraded Lands." Forests 9, no. 4: 213.

Journal article
Published: 10 December 2015 in Notulae Botanicae Horti Agrobotanici Cluj-Napoca
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The organic carbon stock (SOC) (t/ha) was calculated in different approaches in order to enhance the differences among methods and their utility regarding specific studies. Using data obtained in Romania (2000-2012) from 4,500 profiles and 9,523 soil horizons, the organic carbon stock was calculated for the main forest soils (18 types) using three different methods: 1) on pedogenetical horizons, by soil bulk density and depth class/horizon thickness; 2) by soil type and standard depths; 3) using regression equations between the quantity of organic C and harvesting depths. Even though the same data were used, the differences between the values of C stock obtained from the three methods were relatively high. The first method led to an overvaluation of the C stock. The differences between methods 1 and 2 were high (and reached 33% for andosol), while the differences between methods 2 and 3 were smaller (a maximum of 23% for rendzic leptosol). The differences between methods 2 and 3 were significantly lower especially for andosol, arenosol and vertisol. A thorough analysis of all three methods concluded that the best method to evaluate the organic C stock was to distribute the obtained values on the following standard depths: 0 - 10 cm; 10 - 20 cm; 20 - 40 cm; > 40 cm. For each soil type, a correlation between the quantity of organic C and the sample harvesting depth was also established. These correlations were significant for all types of soil; however, lower correlation coefficients were registered for rendzic leptosol, haplic podzol and fluvisol.

ACS Style

Lucian Constantin Dincă; Maria Dincă; Diana Vasile; Gheorghe Spârchez; Liviu Holonec. Calculating Organic Carbon Stock from Forest Soils. Notulae Botanicae Horti Agrobotanici Cluj-Napoca 2015, 43, 568 -575.

AMA Style

Lucian Constantin Dincă, Maria Dincă, Diana Vasile, Gheorghe Spârchez, Liviu Holonec. Calculating Organic Carbon Stock from Forest Soils. Notulae Botanicae Horti Agrobotanici Cluj-Napoca. 2015; 43 (2):568-575.

Chicago/Turabian Style

Lucian Constantin Dincă; Maria Dincă; Diana Vasile; Gheorghe Spârchez; Liviu Holonec. 2015. "Calculating Organic Carbon Stock from Forest Soils." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 43, no. 2: 568-575.