scholarly journals Pengaruh Zat Alelopati Dari Pohon Akasia, Mangium, Dan Jati Terhadap Pertumbuhan Semai Akasia, Mangium, Dan Jati

2015 ◽  
Vol 3 (1) ◽  
pp. 81
Author(s):  
Novia Ekayanti ◽  
Indriyanto . ◽  
Duryat .
Keyword(s):  
Acacia Mangium ◽  
Tectona Grandis ◽  
Acacia Auriculiformis ◽  
Observation Data ◽  
Design Factor ◽  
Factor Ii ◽  
Significant Difference ◽  
Bartlett Test ◽  
Number Of Leaves ◽  
Black Wattle

ABSTRACT Allelopathy is the compound released by the plants to the environtment where actualy another plants is living in.  The purpose of this research were to find out the effect of allelopathy which came from earpod wattle (Acacia auriculiformis), black wattle (Acacia mangium), and teak (Tectona grandis) to the seedlings plants of earpod wattle, black wattle, and teak, and also to find out the effect of allelopathy above mentioned that had the weakest effect.  This research was designed based on factorial in a complete random design.  Factor I was the seedlings which consist of earpod wattle, black wattle, and teak, while factor II was the allelopathy which consists of non allelopathy was used, the use of allelopathy from the extraction of earpod wattle leaves, the extraction of black wattle leaves, and the extraction of teak leaves.  The variable that was observed were seedlings height increasing, seedlings stem diameter increasing, number of leaves increasing, and living percentage of the seedlings.  This observation data was tested by Bartlett test to know the homogenity of variance.  Then it was analyzed by analysis of variance, then it is continually tested by least significant difference test.  All the counting were done at 5% significant level.  The result of this research showed that allelopathy which one came from earpod wattle, black wattle, and teak were not different effect for seedlings from allelopathy source in the same species.  The giving of black wattle allelopathy had significant different effect in height earpod wattle seedlings.  That also the giving of teak allelopathy had significant different effect in height black wattle seedlings.  The earpod wattle allelopathy had significant different effect in diameter of stem earpod wattle, black wattle, and teak seedlings.  Key words : allelopathy, extraction of earpod wattle, black wattle, and teak, seedlings growth

scholarly journals Pengaruh Zat Alelopati Dari Alang-Alang Terhadap Pertumbuhan Semai Tiga Spesies Akasia

2016 ◽  
Vol 4 (2) ◽  
pp. 27
Author(s):  
Melda Yanti ◽  
Indriyanto . ◽  
Duryat .
Keyword(s):  
Acacia Mangium ◽  
Experimental Unit ◽  
Observation Data ◽  
Variance Test ◽  
Design Factor ◽  
Factor Ii ◽  
Significant Difference ◽  
Bartlett Test ◽  
Negative Effect ◽  
Number Of Leaves

Allelopathy is the compound released by the plants (example: blady grass) to the environtment and where another plants is living and could obstruct or extinguish to another plants.  The purpose of research were to figure out the effect of allelopathy  from the blady grass toward the species of acacia seedlings, to figure out the weakest affected seedling species by blady grass allelopathy, and to figure out interaction between concentration of  extracted blady grass and seedling tree species.  The research was designed based on factorial in a complete random design.  Factor I was the seedlings, consisted of acacia, mangium, and acacia alba, while factor II was concentration of extracted blady grass allelopathy, consisted of non extracted allelopathy, extracted allelopathy 25%, extracted allelopathy 50%, extracted allelopathy 75%, and extracted allelopathy 100%. Every treatment was repeated 5 times. The number of the seedlings for each experimental unit was two seeding. The observed variables  were height, diameter of the stem, number of leaves, and living percentage of the seedlings.  This observation data was tested by Bartlett test to find the variance homogenity.  Then it was analyzed by using variance analysis, and tested by least significant difference (LSD).  The calculation were done at 5% significant level.  The result of this research showed that allelopathy of blady grass were significan to the growth of acacia, mangium and acacia alba seedlings. Based on the LSD at 5% was known that the concentrate of blady grass allelopathy had strongest negative effect to the growth seedlings was 100%.  Seedling that was the most resistant to the allelopathy of blady grass is mangium seedling.  It was known from the analysis of variance test there was an interaction between the seedling and the concentration of blady grass allelopathy that effect the height, leaves number, living percentage ofseedlings.  Key words : allelopathy, blady grass, and acacia

scholarly journals Nitrogen transforming organisms in some forest soils of Chittagong University camputs

2013 ◽  
pp. 127-138
Author(s):  
N Chowdhury ◽  
MS Islam ◽  
KT Osman
Keyword(s):  
Nitrogen Content ◽  
Total Nitrogen ◽  
Forest Soils ◽  
Acacia Mangium ◽  
Eucalyptus Camaldulensis ◽  
Tectona Grandis ◽  
Forest Tree ◽  
Denitrifying Bacteria ◽  
Acacia Auriculiformis ◽  
Tree Plantations

Association of nitrogen transforming bacteria in soils under six-forest tree plantations viz. Lagerstroemia speciosa, Acacia auriculiformis, Acacia mangium, Dipterocarpus turbinatus, Tectona grandis, and Eucalyptus camaldulensis were assessed in the present study. Azotobacter population was the least among the nitrogen-transforming bacteria in all soils. Soils under L. speciosa had the lowest population of ammonifying, Nitrosomonas, Nitrobacter and denitrifying bacteria and A. auriculiformis had higher average MPN values, although E. camaldulensis had the highest Nitrobacter population. Population of the microorganisms was positively and significantly correlated with each other, except Azotobacter. Azotobacter was only significantly correlated with the denitrifying bacteria. The nitrogen-transforming microorganisms were significantly related with the total nitrogen content and pH of the forest soils. DOI: http://dx.doi.org/10.3329/cujbs.v3i1.13413 The Chittagong Univ. J. B. Sci.,Vol. 3(1&2):127-138, 2008

scholarly journals Natural Regeneration in Harvested and Unharvested Forest Plantations - Case Study in Chittagong University Forest, Bangladesh

2017 ◽  
Vol 5 (1) ◽  
pp. 15-22
Author(s):  
Mohammad Nizam Uddin ◽  
Barua Subhasis ◽  
Boonyanuphap Jaruntorn
Keyword(s):  
Natural Regeneration ◽  
Dominant Species ◽  
Positive Impact ◽  
Secondary Forest ◽  
Diversity Index ◽  
Acacia Mangium ◽  
Acacia Auriculiformis ◽  
Forest Plantations ◽  
Significant Difference ◽  
Plantation Species

This study was aimed to identify the dominant species establishing during regeneration, their species diversity and whether selection thinning could enhance the regeneration of secondary forest species. Chittagong University Forest was selected for the study and harvested and unharvested sites of forest plantations were demarcated and set 30 quadratic plots (3m × 3m) for each site. Ten per cent selection thinning was done in harvested site although a little anthropogenic disturbance was noticed in both the plantations.  Regenerations were identified into species level and their numbers were counted. Shannon-Weiner diversity index for unharvested plantation was 2.21 and it was 1.45 for harvested plantation. Species evenness index was recorded as 0.81 and 0.74 for unharvested and harvested plantations respectively. Both the plantations did not show a significant difference in diversity of species. According to the Important Value Index (IVI) the dominant species in the harvested site were Acacia auriculiformis followed by Acacia mangium and Albizia lebbeck. In the unharvested site, IVI was the highest for Acacia auriculiformis followed by Aphanamixis polystachya and Lagerstroemia speciosa. In both the sites, Acacia auriculiformis had a significantly (p<0.05) higher number of regeneration in harvested plantations than those of unharvested plantations. Therefore, thinning has a positive impact on natural regeneration and Acacia auriculiformis is the best for natural regeneration in plantations.

scholarly journals Respon Setek Cabang Bambu Kuning (Bambusa Vulgaris) Terhadap Pemberian Aia

2014 ◽  
Vol 2 (1) ◽  
pp. 95
Author(s):  
Yosepin K. Simangunsong ◽  
Indriyanto . ◽  
Afif Bintoro
Keyword(s):  
Acetic Acid ◽  
Indole Acetic Acid ◽  
Shoot Length ◽  
Randomized Design ◽  
Honestly Significant Difference ◽  
Significant Difference ◽  
Bambusa Vulgaris ◽  
Bartlett Test ◽  
Number Of Leaves ◽  
Branch Cutting

Yellow bamboo is one of the bamboo species which used for industrial and house-hold materials, because it has a thick trunk outer layer, length of fiber, and beautiful shape.The success of cuttings grown yellow bamboo branch was lack.To increase the success of the yellow bamboo branches grow cuttings used growth regulators.Therefore, the research was conducted by giving indole acetic acid on yellow bamboo branch cuttings.The objective of this research was to known the growth of yellow bamboo branch cuttings by giving indole acetic acid and known the concentration of the indole acetic acid were the best influence on the growth of yellow bamboo branch cuttings.The research was designed with complete randomized design (CRD) with five treatment,five experimental units, and five branch cuttings for each experimental unit.The concentration ofindole acetic acid (IAA) was 0 ppm, 100 ppm, 200 ppm,300 ppm, and 400 ppm.To test the homogeneity range done with Bartlett test, the data will be tested by analysis of variance and then further tested with honestly significant difference test.Yellow bamboo branch cuttings growth by percentage of life parameters, number of shoots, shoot length, shoot diameter, and a significant number of leaves is known, whereas for root length parameter is not significant. Keywords: branch cutting, indole acetic acid, yellow bamboo

scholarly journals Physical and mechanical properties of (Acacia auriculiformis x A mangium) hybrid Acacia

1970 ◽  
Vol 34 (2) ◽  
pp. 181-187 ◽  
Author(s):  
UK Rokeya ◽  
M Akter Hossain ◽  
M Rowson Ali ◽  
SP Paul
Keyword(s):  
Mechanical Properties ◽  
Specific Gravity ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Tectona Grandis ◽  
Acacia Auriculiformis ◽  
Timber Species ◽  
Green Condition ◽  
Natural Crossing ◽  
Academy Of Sciences

The physical and mechanical properties of hybrid Acacia, produced from natural crossing between two introduced timber species (Acacia auriculiformis and Acacia mangium) were studied. The timber hybrid Acacia is of medium dense having specific gravity 0.56 at green condition which is less than that of teak (Tectona grandis). The volumetric shrinkage of hybrid Acacia wood was found greater than that of teak but the specific gravity was found less than that of teak. From the study of physical and mechanical properties it is evident that the species is moderately strong. The species is suitable for making furniture and other household articles. Key words: Hybrid Acacia; Specific gravity; Physical properties; Mechanical properties DOI: 10.3329/jbas.v34i2.6864Journal of Bangladesh Academy of Sciences, Vol. 34, No. 2, 181-187, 2010

In-vivo anti-oxidant screening of Tectona grandis extract

2020 ◽  
Vol 9 (1) ◽  
pp. 1-4
Author(s):  
Tamilarasi G P ◽  
Sabarees G
Keyword(s):  
Biochemical Parameters ◽  
Tectona Grandis ◽  
The Body ◽  
Altered Expression ◽  
Physiological Conditions ◽  
Synthetic Drugs ◽  
Significant Difference ◽  
Anti Oxidant ◽  
Radical Generation

Oxidation is an essential reaction in the human body, which determines the expression of proteins in the body. This results in the altered expression like rapid growth resulting in cancers and other disorders. Many synthetic drugs are available in the market that is effective in limiting the free radical generation and the reaction of radicals with cells. Unfortunately, all those synthetic drugs were found to cause side effects and adverse effects in the body. But given the accuracy of the predictability of the results and administration, this research focuses on testing the anti-oxidant efficiency in rat models testing the biochemical parameters. Investigations have also been done on the anti-oxidant activity of Tectona, but every research was concentrated to prove the anti-oxidant activity only. extract had been tested for anti-oxidant activity by estimating various tissue parameters and it showed better activity. As predicted, there is a significant difference in the and results which can be explained are due to the physiological conditions that exist inside the body.

PENGARUH STRATEGI PEMBELAJARAN E-LEARNING DAN MINAT BELAJAR TERHADAP HASIL BELAJAR AKUNTANSI

Akademika ◽  
2019 ◽  
Vol 8 (01) ◽  
pp. 81-100
Author(s):  
Eva Kristiyani ◽  
Iffah Budiningsih
Keyword(s):  
Learning Outcomes ◽  
Learning Strategies ◽  
Learning Strategy ◽  
Sampling Technique ◽  
Student Group ◽  
Design Factor ◽  
Significant Difference ◽  
E Learning ◽  
Learning Interest ◽  
Equivalent Class

The aim of this research is to know the influence of e-learning learning strategy and interest in learning to accounting learning result. This research was conducted at SMK Permata Bangsa Kelurahan Jakasetia, South Bekasi Subdistrict, Bekasi City involving 56 samples taken with random sampling technique to the equivalent class. Instrument used in this research is the accounting test and questionnaire interest in student learning; and the data analysis using two-way ANAVA and Tukey Test. The results of this study obtained: (1) there is a significant difference between the learning outcomes of students who are taught with e-learning learning strategies and expository strategies in which the results of student accounting learning taught by e-learning strategy is higher than the students taught by strategy expository learning. (2) There is an interaction between students who are taught using learning strategies with interest in learning on accounting learning outcomes. (3) This means that the result of group accounting learning which is taught using e-learning learning strategy is significantly higher than that taught using expository learning strategy in students who have high learning interest. (4) While the learning result of student group accounting that is taught using e-learning strategy is same as learning result which is taught using expository learning strategy to students who have low learning interest, influenced by student environment factor and learning design factor in research.

Cyclamen Leaf Unfolding Rate in Response to Temperature

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 447d-447
Author(s):  
Meriam Karlsson ◽  
Jeffrey Werner
Keyword(s):  
Day Length ◽  
Leaf Number ◽  
Cyclamen Persicum ◽  
Flower Buds ◽  
Flower Bud ◽  
Leaf Unfolding ◽  
Significant Difference ◽  
Number Of Leaves ◽  
Growth Chambers ◽  
Response To Temperature

Nine-week-old plants of Cyclamen persicum `Miracle Salmon' were transplanted into 10-cm pots and placed in growth chambers at 8, 12, 16, 20, or 24 °C. The irradiance was 10 mol/day per m2 during a 16-h day length. After 8 weeks, the temperature was changed to 16 °C for all plants. Expanded leaves (1 cm or larger) were counted at weekly intervals for each plant. The rate of leaf unfolding increased with temperature to 20 °C. The fastest rate at 20 °C was 0.34 ± 0.05 leaf/day. Flower buds were visible 55 ± 7 days from start of temperature treatments (118 days from seeding) for the plants grown at 12, 16, or 20 °C. Flower buds appeared 60 ± 6.9 days from initiation of treatments for plants grown at 24 °C and 93 ± 8.9 days for cyclamens grown at 8 °C. Although there was no significant difference in rate of flower bud appearance for cyclamens grown at 12, 16, or 20 °C, the number of leaves, flowers, and flower buds varied significantly among all temperature treatments. Leaf number at flowering increased from 38 ± 4.7 for plants at 12 °C to 77 ± 8.3 at 24 °C. Flowers and flower buds increased from 18 ± 2.9 to 52 ± 11.0 as temperature increased from 12 to 24 °C. Plants grown at 8 °C had on average 6 ± 2 visible flower buds, but no open flowers at termination of the study (128 days from start of treatments).

scholarly journals Stock Market Reaction to COVID-19: Evidence in Customer Goods Sector with the Implication for Open Innovation

2020 ◽  
Vol 6 (4) ◽  
pp. 99
Author(s):  
Zaky Machmuddah ◽  
St. Dwiarso Utomo ◽  
Entot Suhartono ◽  
Shujahat Ali ◽  
Wajahat Ali Ghulam
Keyword(s):  
Stock Prices ◽  
Stock Price ◽  
Practical Implication ◽  
Efficient Market Hypothesis ◽  
Future Research ◽  
Observation Data ◽  
Economic Sectors ◽  
Significant Difference ◽  
Before And After ◽  
Long Term Impact

The coronavirus pandemic has spread all over the world, affecting both the health and economic sectors. The aim of this research was to observe stock prices of customer goods before and after the COVID-19 pandemic using event study and the comparison test. The sample included data of daily closing stock prices and volume of stock trade during the three months before (−90 days) and after (+90 days) the occurrence of the COVID-19 pandemic ongoing, totaling 2670 observation data both before and after the COVID-19 pandemic, for a total of 5340. The research findings indicate a significant difference between the daily closing stock price and volume of stock trade before and after the COVID-19 pandemic. The current research has both theoretical and practical implications: the findings strengthen the efficient market hypothesis, which states that the more complete the provided information, the more efficient the market. The practical implication is that investors should be careful when choosing to invest. Investors should choose customer goods sector companies that provide products that are much needed by customers, for example, pharmacy, food, beverages, etc. Future research is needed to investigate the long-term impact of the pandemic on the economy.

Sign in / Sign up

Export Citation Format

Share Document