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Issues: 1-5 | 6-10 | 11-15 | 16-19
Downloads: 26

ALLOMETRIC MODEL OF WOOD BIOMASS AND CARBON FOR GLIRICIDIA (GLIRICIDIA SEPIUM (JACQ.) KUNTH EX WALP.) AT BIOENERGY PLANTATION IN INDONESIA

Budi Mulyana (*), Djoko Soeprijadi, and Ris Hadi Purwanto
 

Department of Forest Management, Faculty of Forestry, Universitas Gadjah Mada, Yogyakarta, 55281 Indonesia. *E-mail: budimulyana@ugm.ac.id

Abstract:

The paradigm of multipurpose forest management in gliricidia plantation can be developed to produce woody biomass and carbon stock. Production estimation of gliricidia plants in producing woody biomass and carbon stocks needs to be estimated through allometric models. The research objective is determining the best allometric equations of wood biomass and carbon stocks with predictors of stem diameter. The materials used in the study were the gliricidia stand with age 1–5 years at Forest Management Unit Semarang. The method used in measuring and estimating forest carbon stocks refers to Indonesian National Standard (SNI) No 7724: 2011 and the SNI No 7725: 2011. The results showed that the biomass of gliricidia plants was distributed in stems (10.75 %), branches (86.30 %), and leaves (2.93 %). Furthermore, the average carbon content in stems was 57.40 %, in branches – 56.30 %, and in leaves – 52.90 % of the dry weight. R2adj of allometric models were 0.780 (linear); 0.730 (exponential); 0.532 (logarithmic); 0.799 (polynomial); and 0.959 (power). While the RMSE values were 38.89 %, 1.20 %, 56.66 %, 37.16 %, and 0.48 %, respectively. The allometric model validation showed that power model is the best allometric model for wood biomass and total carbon content. Thus, it can be considered to estimate wood biomass and total carbon with predictors of stem diameter. Further research by adding other predictors is needed to make the result of allometric models more accurate.

(Forestry Ideas, 2020, Vol. 26, No. 1) [Download]
Downloads: 21

ENVIRONMENTAL INDICATORS OF THE BALANCE OF THE TERRITORIES OF SMALL TOWNS IN KYIV REGION

Vasyl Yukhnovskyi* and Olha Zibtseva

Department of Landscape Architecture and Phytodesign, Forest Institute,
National University of Life and Environmental Sciences of Ukraine, Kyiv,
03041. E-mails: yukhnov@ukr.net*, stplut2017@gmail.com

Abstract:

Based on the data of the StateGeoCadastre of Ukraine and the General development plans of towns, a comparative analysis of the structure of the land fund of small towns of Kyiv region has been carried out with the following ecological indicators: ratio of different types of land use, level of greening, population/green plantings ratio. Data analysis of the level of greening of towns and the availability of green public landscapes for general population has been conducted and it revealed that the current state of land use of small towns, as well as other urbanized territories, does not meet the requirements of environment management. Results of the analysis suggest that small towns are characterized by an excessive proportion of property development areas and suboptimal areas of natural territories, as well as insufficient greenery plantings, which require further balancing. In most of the studied small towns ecological situation can be considered satisfactory. Due to the extraordinary diversity of ecological and geographical conditions, individual approach to the development and improvement of greenery systems of small towns has been deemed feasible.

(Forestry Ideas, 2020, Vol. 26, No. 1) [Download]
Downloads: 19

STRUCTURE AND STOCKING CONTROLOF UNEVEN-AGED CONIFEROUS STANDS IN BULGARIA

Toma Tonchev*, Yordan Ivanov, Ilko Dobrichov, and Yavor Poryazov

University of Forestry, Sofia, Bulgaria, 1797, 10 Kl. Ohridski Blvd. *E-mail: toma.tonchev@gmail.com

Abstract:

This paper presents results of a study on the stand structure and some stocking control approaches of uneven-aged coniferous stands. The even-aged forest management prevails in silvicultural practices in Bulgarian forestry. Uneven-aged silviculture started in the early 1930s when the Biolley control method has been applied in the forest management plan of ‘Chamkoria’ forest. There is relatively little knowledge of uneven-aged forest management compared to a large amount of forest research related to even-aged one. The stand structure of uneven-aged stands is described by diameter distribution and normal, exponential and Weibull distributions have been tested for fit. The optimal distribution of trees by diameter classes (14–18 cm, 22–38 cm, above 42 cm) is calculated for stands with exponential and Weibull distribution.

(Forestry Ideas, 2020, Vol. 26, No. 1) [Download]
Downloads: 16

PHYTOINDICATIVE ASSESSMENT AND ANALYSIS VEGETATION IN DISTURBED AREAS AFTER ILLEGAL AMBER MINING IN THE WESTERN POLISSYA OF UKRAINE
 

Andrii Churilov (1*), Igor Goncharenko (2), Olha Kravchenko (3), Serhii Kovalevskyi (1), Yurii Marchuk (1), Konstantin Maevskyi (1), Serhii Kovalevskyi (4), Olha Marchuk (1), Maria Shevchuk ...<


1. National University of Life and Environmental Sciences of Ukraine, Department of Botany,
Dendrology and Forest Tree Breeding, 2 Henerala Rodimtseva Str., Kyiv, Ukraine.
E-mails: churilovam@nubip.edu.ua*, dendrology.nubip@gmail.com, s.kovalevsky@ukr.net

2. Institute for evolutionary ecology of the National Academy of Science of Ukraine, Department of
Ecological Monitoring, 37, Lebedeva Str., Kyiv, Ukraine. E-mail: goncharenko.ihor@gmail.com

3. National University of Life and Environmental Sciences of Ukraine, Department of General,
Organic and Physical Chemistry, 17 Heroiv Oborony Str., Kyiv, Ukraine.
E-mail: olha_kravchenko@nubip.edu.ua

4. National University of Life and Environmental Sciences of Ukraine, Department of Forest
Mensuration and Forest Management, 2 Henerala Rodimtseva Str., Kyiv, Ukraine.
 

Abstract:

The article is presents results of studies on the vegetation of forest territories in the western part of Ukrainian Polissya, touched upon because of illegal amber mining. It has been established that the total species composition consists of 111 species, 80 genera and 30 families of vascular plants. Leading positions in the number of species occupy the families Poaceae and Asteraceae. According to the ratio of diagnostic species among the vegetation classes, representatives of the two classes Molinio-Arrhenatheretea and Quercetea robori-petraeae occupy the leading positions in the phytosociological structure, and in general, the distribution of species of the Braun-Blanquet’s classes of the flora studied is consistent with the type of vegetation, which prevailed in the territories prior the violations. According to the Calinski-Harabasz criterion, clustering the relevés dataset into two groups (A and B) is most acceptable. The naturalness of species composition of cluster A is higher and is credibly different from cluster B. Phytoindication scores of most factors except humidity (Hd) are significantly different between clusters A and B. Additionally, the largest difference being observed in the nitrogen values, with the sites of the cluster A corresponding to soils with the lower nitrogen availability. The studied vegetation retaining sand is comprising some natural features of the surrounding type of vegetation of Ukrainian Polissya. Moreover, the relative remoteness from populated and industrial places, together with the conservation of the surrounding forests creates a potential for a substantial recolonization of the land by forest plant species. Despite this, it is advisable to conduct land restoration activities and monitor succession changes over longer period.

(Forestry Ideas, 2020, Vol. 26, No. 1) [Download]
Downloads: 24

STAND STRUCTURE OF PRIVATE SMALLHOLDER FOREST AS A REFLECTION OF LIVELIHOOD STRATEGIES: A CASE STUDY OF SEMOYO VILLAGE, GUNUNGKIDUL REGENCY, INDONESIA

Tatik Suhartati (1,2*), Ris Hadi Purwanto (1), Agus Setyarso (2), and Sumardi (1)
 


1. Faculty of Forestry, Gadjah Mada University, Jl. Agro, No 1, Yogyakarta 55281, Indonesia. E-mails: violethaty@gmail.com*, risuhadi@yahoo.com, sumardibdh@yahoo.com

2. Faculty of Forestry, Stiper Agricultural University, Yogyakarta, Indonesia.
E-mail: agusse@yahoo.com

Abstract:

The private smallholder forest significantly contributes to the wood industry as well as to the livelihood and needs of the society. Farmers grow mixtures of crops and species leading to a multi-layer vegetation covers, and forest stand. However, the structure and composition of the forest exposes a unique mosaic on the landscape. Therefore, the purpose of this study is to determine the association between forest stand structure and composition with varying farmer’s livelihood strategies such as fully-managed forest farmer, partly-managed forest farmer, and non-managed forest farmer. Data were obtained from Semoyo Village, Patuk District, Gunungkidul Regency from 72 plots representing two types of planting pattern, namely: trees along the border and mixed patterns. The negative exponential model was used to describe the forest structure model. The results showed that fully-managed forest farmers tend to have few trees with the smallest diameter at breast height, plant more multi-purposes trees species. All stand structures in the three types of farmers’ can be described by a negative exponential model, but each type possessing a different rate of diminishing in the number of trees. All of these showed that differences in stand structure are a reflection of differences in livelihood strategies

(Forestry Ideas, 2020, Vol. 26, No. 1) [Download]
Issues: 1-5 | 6-10 | 11-15 | 16-19