scholarly journals The growth performance of dipterocarps species and understorey diversity in the Gunung Dahu Research Forest, Leuwiliang, Bogor

2021 ◽  
Vol 914 (1) ◽  
pp. 012042
Author(s):  
R A Fambayun ◽  
Istomo ◽  
D E Ramadhan
Keyword(s):  
Growth Performance ◽  
Habitat Suitability ◽  
Wiener Index ◽  
Research Area ◽  
Species Selection ◽  
Forest Community ◽  
Annual Increment ◽  
Selection For ◽  
Shorea Platyclados ◽  
Mean Annual Increment

Abstract Dipterocarps species is the main species composes Gunung Dahu research forest. Habitat suitability and growth performance of a species are some factors considered in the species selection for forest establishment. The understorey in a forest community serves to protect soil from erosion. This research aimed is to analyze the growth performance of various Dipterocarpaceae species and study understorey diversity in the research area. The measurement was conducted in four species trial plots contain ten Dipterocarps species consist of five individuals per species per plot or 200 individuals in total. The growth performance of Dipterocarp species was analyzed using the current annual increment (CAI) and mean annual increment (MAI) methods. The understorey diversity was analyzed using the Shannon-Wiener Index. The result showed that Shorea johorensis obtained the highest CAI, 0.95 cm year−1, and Shorea platyclados got the highest MAI, 1.78 cm/year. S. platyclados and S. leprosula were projected to reach <40 cm in diameter after they got 25 years. The Gunung Dahu research forest’s understorey was classified as moderate (1.68 - 2.33). The dominant understorey species, namely Oldenlandia auricularia, Neprolephis biserrate, Ottochloa nodosa, and Gleichenia linearis. This study concluded that the growth performance of Dipterocarps species in the study area varied, and the understorey condition was classified as moderate, where its diversity has a positive correlation with the crown openness.

scholarly journals Growth assessment of upper hill dipterocarp (Shorea platyclados) at the various slope in a rehabilitated landscape

2021 ◽  
Vol 914 (1) ◽  
pp. 012027
Author(s):  
F Reksawinata ◽  
P Pamoengkas ◽  
H H Rachmat
Keyword(s):  
Growth Performance ◽  
Basal Area ◽  
Tree Height ◽  
Average Diameter ◽  
Stem Diameter ◽  
Average Height ◽  
Annual Increment ◽  
Area Index ◽  
Shorea Platyclados ◽  
Mean Annual Increment

Abstract Rehabilitation aims to improve landscape function while increasing its resilience to climate change. Gunung Dahu research forest is a rehabilitated hilly landscape that is planted with more than 25 dipterocarp species, including an upper hill dipterocarp tree of Shorea platyclados at various site conditions. This study aimed to assess the growth performance of S. platyclados at five sloping levels class of 0-8%, 8-15%, 15-25%, 25-45%, and >45%. Observed growth attributes were stem diameter, total height, basal area, Mean Annual Increment (MAI), and Leaf Area Index (LAI), and diameter. The results showed that sloping levels significantly affect the growth performance of the planted trees. The highest slope level (>45%) supported the highest average stem diameter and tree height (41.48 cm and 20.86 m). The sloping level of >45%, 25-45%, 15-25%, 8-15%, and 0-8% yield different value of average diameter which were 41.48 cm, 35.86 cm, 36.54 cm, 34.61 cm, and 31.23, while the average height were 20, 86m, 19.78 m, 16.72 m, 18.84 m, 18.61 m respectively. Thus, the upper hill dipterocarp of S. platyclados is a prospective native tree species for rehabilitating hilly upland landscapes.

Growth performance of Santalum album its income potentiality: A study from Pyuthan District, Nepal

2021 ◽  
Vol 1 (1) ◽  
pp. 026-034
Author(s):  
Nisha Poudel ◽  
Ram Asheshwar Mandal ◽  
Ajay B. Mathema ◽  
Kailash Timilsina
Keyword(s):  
Growth Performance ◽  
Value Chain ◽  
Group Discussion ◽  
Primary Data ◽  
Santalum Album ◽  
Annual Income ◽  
Height Increment ◽  
Annual Increment ◽  
Volume Increment ◽  
Mean Annual Increment

The Santalum album is becoming a popular income generating tree species in Nepal but its growth performance has not been assessed so far yet. Thus, this study was objectively conducted to assess mean annual increment, income from Santalum album and value chain analysis. The Private plantation of Pyuthan district was selected for the study site. The diameter and height of 450 plants were measured and their age was recorded. Total fifteen key informant interviews, forty five farmers’ interviews and one focused group discussion were conducted to collect primary data. The collected data were analyzed using descriptive and inferential statistics .Mean annual increment, price of Santalum album and contribution of Santalum album in total income were analyzed. The result showed that the highest mean annual diameter increment was 51.94 cm and lowest mean annual increment was 28.25cm, the highest mean height increment was 6.39 m and the lowest mean annual height increment was4.47m and the highest mean volume increment was 0.678 m3but the lowest mean annual volume increment was 0.134 m3. The estimated maximum range of annual income from Santalum album was US$ 221-530 which was 10-15% contribution in farmers annual income while minimum range of this was US$ 194-265 and it contributes<10%.The difference of the price of Santalum album between the farmers and users in Kathmandu was2200 times more.

scholarly journals Effects of Soil Compaction and Relative Light Intensity on Survival and Growth Performance of Planted Shorea macrophylla (de Vriese) in Riparian Forest along Kayan Ulu River, Sarawak, Malaysia

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Aina Nadia Najwa Mohamad Jaffar ◽  
Mohd Effendi Wasli ◽  
Mugunthan Perumal ◽  
Jonathan Lat ◽  
Hamsawi Sani
Keyword(s):  
Light Intensity ◽  
Growth Performance ◽  
Soil Compaction ◽  
Riparian Forest ◽  
Average Height ◽  
Annual Increment ◽  
Compacted Soils ◽  
Relative Light Intensity ◽  
Survival And Growth ◽  
Mean Annual Increment

A study was conducted in riparian forest along Kayan Ulu River, Sarawak, Malaysia, to investigate the effects of soil compaction and relative light intensity (RLI) on survival and growth performance of planted Shorea macrophylla. The study sites were stands reforested in different years (1996: SPD96; 1997: SPD97; 1998: SPD98; 1999: SPD99). The survival, growth performance, soil compaction, and RLI were measured. SPD96 trees had the highest survival (84%) and showed the most favourable growth. Average height, mean annual increment in height, and RLI were highest in SPD97 while mean annual increment in volume was highest in SPD98. Soil compaction in SPD98 and SPD99 was higher as compared to SPD96 and SPD97. This was due to the compacted soils caused by anthropogenic activities and natural causes (wet soils) in riparian forest along Kayan Ulu River at shallow depth. High survival and favourable growth performance of S. macrophylla were influenced by the edaphic factor with special reference to less compacted soils and high RLI. Stepwise multiple regression demonstrated significant effects of soil penetration resistance at the depth of 0-30 cm and RLI on mean annual increment in diameter. Further ecological studies on other environmental factors should be implemented to draw up a Dipterocarp planting scheme for the future restoration of riparian ecosystem.

scholarly journals The Impact of Selection using Residual Average Daily Gain and Marbling EPDs on Growth Performance and Carcass Traits in Angus Steers

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
T. R. Krause ◽  
E. R. Moore ◽  
J. Duggin ◽  
J. R. Segers ◽  
T. D. Pringle
Keyword(s):  
Growth Performance ◽  
Feed Efficiency ◽  
Average Daily Gain ◽  
Backfat Thickness ◽  
Feeding Trial ◽  
Body Weights ◽  
Selection For ◽  
Carcass Merit ◽  
The Impact ◽  
Daily Gain

ObjectivesProfitability in the beef industry has narrow margins regulated by revenue from output traits like growth and carcass merit, but profitability is also largely impacted by input expenses like feed costs. Selecting for improvements in feed efficiency during the finishing phase, one of the most feed intensive segments of the industry, can help to mitigate those input costs. This study compared growth performance, feed efficiency, body composition, and carcass characteristics in Angus steers (n = 321) from bulls divergently selected for feed efficiency and marbling.Materials and MethodsAngus sires were selected based on high (10th percentile or better) and low (85th percentile or worse) residual average daily gain (RADG) EPD as well as high (fifth percentile or better) and average (near 50th percentile) marbling (MARB) EPD. These criteria resulted in a 2 × 2 factorial design with four breeding lines: high RADG/high MARB, high RADG/average MARB, low RADG/high MARB, low RADG/average MARB. Data were analyzed using MIXED procedures of SAS with RADG and MARB as main effects. Significance was set at α = 0.05. Generation was also analyzed, where generation one (GEN1) steers were from a selected sire while generation two (GEN2) steers were from a selected sire and a selected dam.ResultsUltrasound and carcass data revealed no differences (P ≥ 0.12) in 12th rib backfat thickness from weaning through slaughter for the RADG EPD groups. Yield grade and dressing percent did not differ (P ≥ 0.56) across RADG or MARB groups. At the beginning and end of the feeding trial, the high RADG (P ≤ 0.02) group had larger ultrasound ribeye area (REA) than the low RADG group. Carcass REA tended (P = 0.08) to be larger in the high versus low RADG steers. During the feedlot trial and through slaughter, body weight was heavier (P ≤ 0.006) for the high versus low RADG steers but did not differ (P ≥ 0.44) across MARB EPD. Feed efficiency measures did not differ (P ≥ 0.32) across RADG or MARB groups apart from the tendency (P = 0.08) for residual feed intake to be lower in the high versus low RADG steers. Marbling scores differed (P ≤ 0.04) across RADG and MARB groups with the low RADG steers and the high MARB steers having improved marbling. The quality grade distribution across MARB EPD revealed that the average MARB steers graded 73% Choice and 25% Prime while the high MARB steers graded 56% and 42%, respectively. Slice shear force did not differ (P ≥ 0.32) across RADG or MARB EPD. Body weights tended (P = 0.06) to be heavier at the start of the feeding trial for GEN1 versus GEN2 steers. Total gain, average daily gain, and feed to gain (F:G) differed by generation (P ≤ 0.007) with increased rates of gain and reduced F:G in the GEN2 versus GEN1 steers. Body weights did not differ (P = 0.72) across GEN at the end of the feeding trial. Backfat thickness at the start and end of the feedlot phase was less (P ≤ 0.03) and marbling score was improved (P = 0.02) in the GEN2 versus GEN1 steers, respectively.ConclusionThese results suggest that selection using RADG EPD has negligible impacts on meat quality; and that progress in selection for efficiency can be achieved while advancing carcass quality and value. Furthermore, continued divergent selection for feed efficiency and marbling has the potential to improve feed efficiency through advancements in the rate of gain, while enhancing carcass merit through marbling.

scholarly journals ECONOMIC APPROACH TO THE CHOICE OF TARGET WOOD SPECIES FOR THE FOREST GROWING IN KAMA REGION OF THE REPUBLIC OF TATARSTAN

2017 ◽  
pp. 20-27
Author(s):  
Пуряев ◽  
Aynur Puryaev ◽  
Мифтахов ◽  
Timur Miftakhov ◽  
Демаков ◽  
...  
Keyword(s):  
Tree Species ◽  
Market Value ◽  
Economic Assessment ◽  
Oak Forests ◽  
Forest Site ◽  
Economic Approach ◽  
Annual Increment ◽  
The Republic ◽  
Standard Terms ◽  
Mean Annual Increment

The objectives of economic assessment of forests, growing on rich soil and environmental conditions, are especially important for the Republic of Tatarstan, as forest site conditions are presented, mostly, fresh suramens and sudubravas. The aim is to develop an algorithm and a mathematical model of the tax and market value dynamics of stands, needed to justify the choice of target tree species. The object of the study is served as detached electronic database of forestry and forest taxation indices of Kama region, general commodity tables and rate per unit volume of standing wood. The methodology of the study was consistent sort and organize raw data on the studied parameters, as well as the drawing up of mathematical models of the dynamics of the studied parameters. According to the research rezults the algorithm of selecting the target tree species was developed, providing the highest economic benefit in cultivation. The pine stands are most profitable to grow at fresh suramens and oak forests at fresh sudubravas. Age of stand’s economic maturity, which occurs at the climax moment of values of mean annual increment of its tax value, is much lower for most tree species, than the established standard terms of logging.

Multi-criteria-based Plant Species Selection for Gully and Riverbank Stabilization in a Sub-humid Tropical Area

2017 ◽  
Vol 28 (5) ◽  
pp. 1675-1686 ◽  
Author(s):  
Ayalew Talema ◽  
Jean Poesen ◽  
Bart Muys ◽  
Bert Reubens ◽  
Hirko Dibaba ◽  
...  
Keyword(s):  
Plant Species ◽  
Species Selection ◽  
Tropical Area ◽  
Selection For
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