Operational Performance of the Selective Cutting of Trees With Chainsaw

Acosta, Fidel Cándano; Oliveira, David Christian de; Arruda, Cleide; Garcia, Marcos Leandro; Melo, Rafael Rodolfo de

doi:10.1590/2179-8087.023916

Cited by 4 publications

(4 citation statements)

References 4 publications

(8 reference statements)

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“…Diameter at Breast Height (DBH)), species, number of trees per ha, cutting technique/ experience of operators, felling type (clear cut, systematic, selective thinning), felling intensity, stand type (evenly-aged high forest, coppice, etc. ), weather conditions and distance between trees can impact on the productivity of motor-manual felling (Sobhani, 1984;Peterson, 1987;Food and Agriculture Organization (FAO), 1998;Hartsough et al, 2001;Kleunder, Stokes, 1996;Wang et al, 2004;Ghaffariyan, Sobhani, 2007;Magagnotti et al, 2012;Balimunsi et al, 2011;Balimunsi et al, 2012;Borz, Ciobanu, 2013;Ignea et al, 2017;Acosta et al, 2018). It should be noted that felling is one of the riskiest components of harvesting operations.…”

Section: Work Productivity For Motor-manual Fellingmentioning

confidence: 99%

Review of studies on motor-manual felling productivity in eucalypt stands

Ghaffariyan¹

2021

SBAL

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Globally, about 20 million ha of land area is occupied by plantations of Eucalyptus. Motor-manual tree harvest-ing techniques (using chainsaws) are still applied in eucalypt plantations, especially in difficult terrains or for large- sized trees where mechanised felling may not be an effective and safe possible option to apply. There is little information available on motor-manual felling in eucalypt stands. This article reviewed available literature on the productivity of motor-manual felling. The results were classified into four regions, including Africa, Asia/Oceania, America and Europe. Results of international studies indicate that the main factors impacting the productivity of motor-manual felling include diameter at the breast height (DBH), travelling distance to trees, understory density and terrain slope. Operator experience also plays a key role in felling operations. The range of reported productivity varied from 0.6 m3/PMH0 to 48.9 m3/PMH0 in different regions. This article provides key recommendations on improving motor-manual felling productivity, which can provide a guide for sustainable harvesting planning purposes. 

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Section: Work Productivity For Motor-manual Fellingmentioning

confidence: 99%

Review of studies on motor-manual felling productivity in eucalypt stands

Ghaffariyan¹

2021

SBAL

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“…Previous research aimed at studying productivity costs of chainsaw logging has confirmed the influence of DBH on the cutting and total felling time. Some of these studies were conducted in forests of Arkansas (Lortz et al, 1997), the Appalachian Mountain, USA (Wang et al, 2004), the Caspian Forests, Iran (Behjou, 2012;Jourgholami et al, 2013), and the state of Mato Grosso, Brazil (Acosta et al, 2018). However, comparing the time involved in directional felling operations is difficult given the differences in the execution methodologies (Câmpu & Ciubotaru, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…More specific aspects that can interfere with the quality of directional felling comprehend felling direction angles (Cedergren et al, 2002;Krueger, 2004), the time used in the procedures (Lortz et al, 1997;Câmpu & Ciubotaru, 2017;Acosta et al, 2018), and dendrometric variables (Koger, 1983;Jourgholami et al, 2013). Identifying the most relevant components of directional felling can help execute the operation with accuracy, safety, and control (Naghdi et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Factors Influencing Directional Tree Felling in the Tapajós National Forest, Amazon, Brazil

Silva¹,

Ruschel²,

Reis³

2022

JAS

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Given its complexity, directional felling is considered one of the most dangerous activities in the exploratory phase of forest management projects for timber obtention. Therefore, detailed studies of the variables influencing its execution are necessary. The present research was conducted in the Tapajós National Forest, Brazilian Amazon, and analyzed 1,075 trees logged using the directional felling technique in a 504.30 ha area. To better understand directional felling, the studied variables were subjected to descriptive analyses and principal component analysis, a multivariate procedure that enables the simultaneous evaluation of several variables. While the diameter, basal area, and stem and branch volume explained most of the variability concerning directional felling, the commercial height influenced the least. Trees of the species Hymenolobium petraeum (angelim pedra) strongly correlated with the dendrometric variables diameter and stem and branch volume. Those of the species Hymenaea courbaril (jatobá) showed a strong correlation with the commercial height. Pseudopiptadenia psilostachya (fava timborana), Dipteryx odorata (cumaru), Hymenaea parvifolia (jutai mirim), and Astronium lecointei (muiracatiara) had a strong correlation with the basic wood density. Trees of the species Couratari guianensis (tauari), Lecythis pisonis (sapucaia), Astronium lecointei (muiracatiara), Mezilaurus itauba (itaúba), and Goupia glabra (cupiúba) showed lower correlations with the time needed for planning, cutting, and felling. They also had a reduced correlation with the angular differences between the natural and effective and the intended and effective felling directions. The latter results suggest that these species do not follow a defined pattern concerning the directional felling technique. However, trees of the other species followed a different tendency. In general, the logged trees lacked correlation with the directional felling cutting and total operation time. The analyses suggest that as the diameter of a tree increases, the chances of completing its directional felling decrease.

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“…Berdasarkan rata-rata waktu yang diperlukan untuk menebang pohon pada teknik penebangan konvesional lebih lama daripada teknik perbaikan maka dapat disimpulkan bahwa semakin tinggi rata-rata DBH pohon maka belum tentu menghasilkan rata-rata produktivitas penebangan yang tinggi, hal ini dikarenakan keterampilan operator ikut berpengaruh. Variabel DBH memiliki korelasi yang tinggi dengan waktu penebangan pohon, tetapi untuk nilai DBH yang sama tinggi komersial pohon mungkin sangat berbeda untuk setiap lokasi, yang secara langsung mempengaruhi perkiraan produksi (Acosta et al 2018). Batang pohon berukuran besar dapat menjadi penghalang penebangan saat menggunakan chainsaw.…”

Section: Produktivitas Penebanganunclassified

Mengurangi keterbukaan hutan melalui teknik pemananenan kayu yang tepat di hutan alam

Yuniawati

Tampubolon

2021

J. Ilmu Lingk.

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Kegiatan pemanenan kayu memberikan kontribusi yang sangat besar terhadap produksi kayu. Pohon produksi yang berada di dalam hutan tidak dapat dimanfaatkan jika tidak ditebang dan tidak dikeluarkan dari dalam hutan. Metode penelitian ini adalah membuat 6 plot contoh pengamatan (PCP) masing-masing 3 PCP untuk teknik perbaikan (TP) dan 3 PCP untuk teknik konvensional (TK) pada satu petak tebang, melakukan penebangan pohon dan penyaradan dengan TP dan TK, melakukan pengamatan dan pengukuran produktivitas pemanenan kayu dan luas areal hutan yang terbuka akibat penebangan dan penyaradan serta menganalisis pengaruh kedua teknik terhadap produktivitas areal hutan terbuka dengan uji t. Tujuan penelitian adalah untuk mengetahui pengaruh dua teknik pemanenan kayu terhadap produktivitas dan areal hutan terbuka. Hasil penelitian menunjukkan bahwa : 1) Rata-rata produktivitas penebangan dengan TK dan TP masing-masing adalah 10,60 m3/jam dan 13,95 m3/jam 2) Rata-rata produktivitas penyaradan dengan TK dan TP masing-masing adalah 7,25 m3/jam dan 9,60 m3/jam; 3) Rata-rata areal hutan terbuka akibat penebangan dengan TK dan TP masing-masing adalah 15,67% dan 7,43% ; 4) Rata-rata areal hutan terbuka akibat penyaradan dengan TK dan TP masing-masing adalah 10,50% dan 6,68%. Menerapkan teknik perbaikan dapat mengurangi terjadinya keterbukaan hutan pada penebangan dan penyaradan masing-masing sebesar 8,24% dan 3,82%.ABSTRACTTimber harvesting provides a very large contribution to timber production. Tree production that is in the forest can't be used if they are not felling and removed from the forest. This research method is to make 6 sample observation plot (SOP) each 3 SOP for improving technique (IT) and 3 SOP for conventional technique (CT) on one logging compartment, do felling and skidding by IT and CT, make observations, and measuring the productivity of timber harvesting and the area of open forest due to felling and skidding and analyzing the effect of the two techniques on the productivity of the open forest area with t-test. The research objective was to determine the effect of two timber harvesting techniques on productivity and open forest areas. The results showed that the average productivity of felling by CT and IT was 10.60 m3/hour and 13.95 m3/hour respectively. The average productivity of skidding by CT and IT was 7.25 m3/hour and 9.60 m3/hour respectively. The average open forest area due to felling by CT and IT was 15.6% and 7.43% respectively. The average open forest area due to skidding by CT and IT was 10.50% and 6.68% respectively. Applying improve technique reduced the open forest area through felling and skidding by 8.24% and 3.82% respectively.

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Operational Performance of the Selective Cutting of Trees With Chainsaw

Cited by 4 publications

References 4 publications

Review of studies on motor-manual felling productivity in eucalypt stands

Review of studies on motor-manual felling productivity in eucalypt stands

Factors Influencing Directional Tree Felling in the Tapajós National Forest, Amazon, Brazil

Mengurangi keterbukaan hutan melalui teknik pemananenan kayu yang tepat di hutan alam

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