Assessing Effects of Shortening Final Cutting Age on Future CO₂ Absorption of Forest in Korea

2016 ◽  
Vol 7 (2) ◽  
pp. 157 ◽  
Author(s):  
Dong-Hoon Ryu ◽  
Woo-Kyun Lee ◽  
Chol-Ho Song ◽  
Chul-Hee Lim ◽  
Sle-Gee Lee ◽  
...  
Keyword(s):  
Final Cutting

scholarly journals Sink-source and sink-sink relations during reproductive development in Lolium perenne L

1997 ◽  
Vol 45 (4) ◽  
pp. 505-520
Author(s):  
J.W. Warringa ◽  
M.J. Marinissen
Keyword(s):  
Dry Mass ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Sink Strength ◽  
Seed Formation ◽  
Seed Filling ◽  
Pot Trials ◽  
Stem Reserves ◽  
Source And Sink ◽  
Final Cutting

In greenhouse pot trials, L. perenne cv. Barlet plants were labelled with 13C at regular intervals from main spike emergence onwards in order to identify and measure the activity of source and sink organs during seed formation. The source activity of the various tiller groups within the plant roughly reflected the relative contributions of these groups to total plant dry mass. After anthesis there was little net exchange of 13C-label between the older and younger tiller groups. From main spike emergence onwards the source activity of the leaves of the reproductive tiller declined sharply, from 95% of total tiller photosynthesis to 16% at final cutting. The spike became the main assimilating organ on the flowering tiller as the leaves aged. During anthesis the stem was a stronger sink than the seeds. At final cutting 70% of the label was located in the stem, when fixed during anthesis. Water-soluble carbohydrates accumulated in the stem, forming up to 25% of dry matter. After anthesis the sink strength of the developing seeds increased and that of the stem decreased and the stem remained a net sink organ up to about mid-seed filling. Pre-anthesis assimilates contributed 14% to final seed and spikelet carbon, when correcting for the palea and lemma that are present before anthesis. These results show that the stem is a temporary storage organ that can support seed filling. However, only a small amount of the stem reserves was used by the seeds. In contrast to carbon, nitrogen was largely redistributed from the stem and leaves to the seeds. At final harvest 59% of the nitrogen in the flowering tiller was located in the seeds.

scholarly journals Impact and productivity of harvesting while retaining young understorey spruces in final cutting of downy birch (Betula pubescens)

Silva Fennica ◽  
2012 ◽  
Vol 46 (1) ◽  
Author(s):  
Pentti Niemistö ◽  
Heikki Korpunen ◽  
Ari Laurén ◽  
Marika Salomäki ◽  
Jori Uusitalo
Keyword(s):  
Betula Pubescens ◽  
Downy Birch ◽  
Final Cutting

scholarly journals Cutting Production Is Affected by Pinch Number during Scaffold Development of Stock Plants

HortScience ◽  
2004 ◽  
Vol 39 (7) ◽  
pp. 1691-1694 ◽  
Author(s):  
James E. Faust ◽  
Larry W. Grimes
Keyword(s):  
Production Rate ◽  
Development Phase ◽  
Annual Species ◽  
Cumulative Yield ◽  
Bright Pink ◽  
Rate Of Increase ◽  
Significant Difference ◽  
Over Time ◽  
Cutting Production ◽  
Final Cutting

Stock plants of four vegetatively propagated annual species (Argyranthemum frutescens `Comet Pink', Nemesia fruticans `Plum Sachet' Venten., Osteospermum fruticosum `Zulu' L., and Verbena ×hybrida `Lanai Bright Pink' L.) were grown with one (P), two (PP), or three (PPP) pinches during the scaffold development phase. The number of pinches applied to all four species affected the yield and distribution of cuttings produced over time. P began to produce cuttings first; however, the rate (number of cuttings per week) of cutting production was relatively low resulting in the fewest total cuttings produced by the end of the experiment. Cutting harvest from PPP started 3 to 6 weeks after cuttings were initially harvested from P. However, the rate of increase in cutting production was greater in PPP than P for all species, except Osteospermum, so the total cutting yield of PPP equaled P after 3 to 5 weeks of cutting production. The final cutting yield for PPP was 38%, 38%, 20%, and 8% higher than P for Argyranthemum, Nemesia, Osteospermum, and Verbena, respectively. PP produced 24%, 17%, and 21% more total cuttings than P for Argyranthemum, Nemesia, and Osteospermum, respectively, while Verbena displayed no significant difference. At the termination of the experiment, the weekly rate of cutting production increased 66.3%, 84.0%, and 30.5% as pinch number increased from P to PPP for Argyranthemum, Nemesia, and Verbena, respectively. This study demonstrates that the number of pinches performed on stock plants during scaffold development can have a significant impact on the timing, the weekly production rate, and cumulative yield of cuttings harvested.

Productivity of logging large diameter logs and long logs during final cutting in a mountain forest in Japan

2019 ◽  
Vol 30 (3) ◽  
pp. 203-209
Author(s):  
Masahiko Nakazawa ◽  
Chikashi Yoshida ◽  
Tatsuya Sasaki ◽  
Seishiro Taki ◽  
Takumi Uemura ◽  
...  
Keyword(s):  
Large Diameter ◽  
Mountain Forest ◽  
Final Cutting

scholarly journals Forest yield index and its applicability to the assessment of future forest yields

2009 ◽  
Vol 55 (No. 1) ◽  
pp. 41-50 ◽  
Author(s):  
L. Kulla ◽  
J. Tutka ◽  
R. Marušák
Keyword(s):  
Tree Species ◽  
Rotation Period ◽  
Site Index ◽  
Management Decision ◽  
Production Cycle ◽  
Forest Production ◽  
Management Decision Making ◽  
North Western ◽  
Final Cutting

The paper suggests and examines a simplified relative indicator of forest production, with special regard to possibilities of its use in projecting future forests. Forest yield index (<I>I</I><sub>Y</sub>), based on an economic parameter “value of final cutting yield” was proposed, and examined in the model territory of Kysuce in north-western Slovakia. The current values of final cutting yield, dependent on tree species, site index and the length of rotation period served as a basis for the assessment of expected yields. The possibilities and limitations of index applicability in long-term strategic forest management decision-making are discussed, considering the uncertainty of ecological and economic conditions during the long forest production cycle, as well as the complexity of tree species growth and production in the mixed forests, uneven aged forests and forests under climate change.

A Preliminary Microbiological Assessment of Process Hygiene of Traditional Outdoor Camel Slaughter in Sahrawi Refugee Camps†

2012 ◽  
Vol 75 (10) ◽  
pp. 1859-1861
Author(s):  
M. CORRÒ ◽  
S. SALEH-MOHAMED-LAMIN ◽  
S. JATRI-HAMDI ◽  
B. SLUT-AHMED ◽  
S. MOHAMED-LEJLIFA ◽  
...  
Keyword(s):  
Detection Limit ◽  
Experimental Research ◽  
Traditional Method ◽  
Positive Impact ◽  
Statistical Significance ◽  
Refugee Camps ◽  
Laboratory Techniques ◽  
Desert Areas ◽  
Meat Samples ◽  
Final Cutting

The aim of this study was to investigate the hygiene performance of a camel (Camelus dromedarius) slaughtering process as carried out with the traditional method in the Sahrawi refugee camps located in southwestern Algeria. The camel slaughtering process in this region differs significantly from that carried out in commercial abattoirs. Slaughtering is performed outdoors in desert areas, and dehiding of the carcass is approached via the dorsoventral route rather than the classic ventrodorsal route. Samples were taken from 10 camel carcasses from three different areas: the hide, the carcass meat immediately after dehiding, and the meat after final cutting. Enterobacteriaceae counts (EC) were enumerated employing conventional laboratory techniques. Carcass meat samples resulted in EC below the detection limit more frequently if the hide samples from the same carcass had also EC counts below the detection limit. Because of the low number of trials, the calculation of statistical significance of the results was not possible. Further experimental research is needed in order to validate the results presented in this study. The comparison of the microbiological hygiene performance between dorsal dehiding and traditional ventral dehiding of slaughtered animals could serve to validate the hypothesis of the potential positive impact of the dorsal dehiding method in carcass meat hygiene.

scholarly journals L'état actuel des vieilles sapinières à Hylocomium à la forêt Montmorency de l'Université Laval

1969 ◽  
Vol 45 (1) ◽  
pp. 18-21
Author(s):  
Gilbert Paille
Keyword(s):  
Quality Index ◽  
Basal Area ◽  
Balsam Fir ◽  
Natural Mortality ◽  
Annual Increment ◽  
Site Class ◽  
Site Type ◽  
The Mean ◽  
Mean Annual Increment ◽  
Final Cutting

The present status of old balsam fir stands (Hylocomium-Oxalis site-type) has been studied on sites of second quality (index of 40 feet at 50 years) by means of 1/5-acre random sample plots. Comparisons with normal yield tables indicate that, between the age of 70 and 90 years, these stands show 1) too many stems per acre, mainly due to abundant ingrowth, 2) a constant average stand, d.b.h., 3) a loss of 30 sq.ft. per acre of basal area, and 4) a reduction of the mean annual increment in merchantable volume from 33 to 22 cu.ft. per acre.It is concluded that these site class II balsam fir stands are already mature, rapidly deteriorating, and failing to occupy the station fully. Consequently, they should be managed on rotations shorter than 70 years. Thinnings might be conducted 15 years before the final cutting to salvage otherwise heavy losses by natural mortality.

scholarly journals Planning and regulation of pre-final cuttings in Poland – a proposal for change

2017 ◽  
Vol 59 (4) ◽  
pp. 265-271 ◽  
Author(s):  
Tomasz Borecki ◽  
Dariusz Pieniak ◽  
Edward Stępień ◽  
Roman Wójcik
Keyword(s):  
Forest Management ◽  
Management Plan ◽  
Precise Determination ◽  
Practical Reasons ◽  
Long Term Effects ◽  
Dead Trees ◽  
Forest Use ◽  
Definition Of ◽  
Cutting Volume ◽  
Final Cutting

Abstract Scheduling and regulation of the forest use are of much importance in forest management. Decisions regarding the manner, timing, and intensity of tree felling result in long-term effects, as these affect the species and age structure of forests, along with the direction and dynamics of changes in forest resources. Above all, serious doubts concern the way of determining and accounting for the prescribed forest utilization, and in particular, the possibilities of the pre-final cuttings. In recent times, the precise determination of the pre-final cuttings by volume has been given up. According to the law, the area of pre-final cuttings is now obligatory taken into account. Consequently, it is not possible to determine the total volume limiting the amount of timber to be harvested, thus, there is decreased the value of the forest management plan as the document approved by the minister responsible for forestry as well as the basis for forest management. For practical reasons, the specified pre-final cuttings by volume are considered as indicative. Connecting the planned pre-final cutting volume with the expected volume increment of the stand has not been relinquished. In the present paper, the authors called attention to a necessity for further improvement of the medium-term planning of pre-final cutting volume. A need to change the definition of the incidental cutting was emphasized. As said by the authors, the term “incidental cutting” should denote harvesting wood from diseased and dying or dead trees, along with eliminating the effects of tree damage caused by fortuitous events. Accordingly, the incidental cuttings that are inherently unpredictable, should not be directly attributed to pre-final cutting products. Keeping in mind the incidental cuttings, the authors proposed the method of reckoning the forest use, which would allow for correct accounting with regard to the prescribed pre-final cuttings.

scholarly journals Cognition and Evaluation of the Public Regarding Final Cutting Methods

2020 ◽  
Vol 102 (3) ◽  
pp. 180-190
Author(s):  
Norimasa Takayama ◽  
Sato Sanai ◽  
Yuichi Yamaura
Keyword(s):  
The Public ◽  
Final Cutting
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