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Josephus I. Kalangi
Program Studi Kehutanan, Universitas Sam Ratulangi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science Health Professions Immunology & microbiology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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BEBERAPA SIFAT FISIK GUBAL ANGSANA (Pterocarpus indicus) Belly Ireeuw; Reynold P. Kainde; Josephus I. Kalangi; Johan A. Rombang
COCOS Vol. 3 No. 6 (2013)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v3i6.2715

Abstract

ABSTRACT This research was to study about some physical properties of angsana (Pterocarpus indicus) sapwood related in wood position to wood position in trunk (base, middle, and tip) and to environmental factors (temperature and humidity). It used a faktorial design in completely randomized block with combinations of 3 environmental condition and 3 wood position in trunk. These nine treatments are repeated three times. The results showed that moisture content, wood density, and volumetric shrinkage of angsana sapwood could be influenced by wood position in trunk (base, middle, and tip). The swelling property of angsana sapwood was not influenced by wood position in trunk but it was influenced by environmental factors. Key words : physical properties, sapwood, wood position, temperature, humidity
Analisis Potensi Penyerapan Karbon Atmosferik di Stasiun Penelitian Hutan Bron Desa Warembungan Kab. Minahasa Caroline N.A.C. Tasirin; Martina A. Langi; Hengky D. Walangitan; Josephus I. Kalangi
COCOS Vol. 3 No. 6 (2013)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v3i6.2927

Abstract

ABSTRACTThis study aims to analyze the current carbon stock of Bron Forest Research Station, Warembungan village, regency of Minahasa, and to analyze the potential of Bron Forest Research Station in sequestering atmospheric carbon. This study was done in Bron Forest Research Station, Warembungan village, regency of Minahasa, for three months. Measurements for this study were done in 15 systematically placed observation plots. The measured variables were diameter at breast height, bole height, and the mass of litter and understory.The results of this study shows that Bron Forest Research Station has a total biomass of 49,821.84 tonnes, or 996.44 tonnes/ha. This biomass consists of 23,416.27 tonnes of carbon, atau 468.33 tonnes/ha. Up to the time of the study, Bron Forest Research Station has sequestered 85,859.65 tonnes of carbon dioxide from the atmosphere, or 1,717.19 tonnes/ha. Assuming the forest does not undergo any significant change, Bron Forest Research Station will potentially increase its biomass as by 4.66 tonnes/ha/year, or 232.90 tonnes/year for the entire 50-hectares area. This additional biomass entails an increase of carbon stock by 1.72 tonnes/ha/year, or as much as 86.17 tonnes/year for the whole area. Bron Forest Research Station will potentially sequester an additional 6.32 tonnes/ha/year of carbon dioxide from the atmosphere, or as much as 315.97 tonnes/year for the whole area.Keywords: biomass, carbon sequestration, carbon dioxide sequestration.
STUDI RIAP CEMPAKA Elmerrillia ovalis (Miq.) Dandy DI PINARAS DAN MASARANG Zulfitri Lawe; Josephus I. Kalangi; Alfonsius Thomas; Johan A. Rombang
COCOS Vol. 4 No. 1 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i1.3592

Abstract

ABSTRACCommunity forests around Masarang and Pinaras are dominated by stands of E. ovalis (Miq.) Dandy. Theincrement is usually used to express the of increase of stand volume in a specified time unit. This study is aimedto determine the average annual increment of E. ovalis in community forests of Masarang and Pinaras. Thisresearch was conducted in the villages of Masarang and Pinaras. The method used was the comparison of twoindependent samples in two different locations with three replications. The method used was the diameter andheight was measured on 198 E. ovalis trees in Pinaras and 251 E. ovalis trees in Masarang. The results of theanalysis concluded that there was no difference between the increments for E. ovalis in Masarang and Pinaras.Soil fertility, soil texture, and altitude in the 2 locations did not become prohibitive factors for the growth of E.ovalis.Keyword: E. ovalis, Increament, Pinaras, Masarang
PEMUPUKAN GANDASIL-D TERHADAP PERTUMBUHAN BIBIT POHON PENGHASIL GAHARU JENIS Gyrinops versteegii (Gilg) Domke Handiward Tonoro; Fabiola B. Saroinsong; Josephus I. Kalangi; Marthen T. Lasut
COCOS Vol. 4 No. 2 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i2.3775

Abstract

ABSTRACTGaharu contains damar wangi from the mastic tree on a part of gaharu-producer trees that accurs naturally and have died due to a fungal infection that accurs naturally or artificially. The purpose of this study was to analyze the effect of frequency method Randomized Complete Design (CRD), with 5 treatment and 5 replications. A treatment without fertilizer, B treatment (application of fertilizer once a week, which is on Saturday, C treatment (twice a week, which are on Saturday and Tuesday, D treatment (3 times a week, which are on Saturday, Tuesday and thursday and E treatment (4 times a week, which are on Saturday, Monday, Wednesday, Friday. Planting medium used in this study is a mixture of soil, sand and chicken manure in the ratio 1:1:1 by volume. Variables measured were plant’s height, stem’s diameter and number of leaves. The results showed that the application of leaf fertilizer Gandasil D on Gyrinops versteegi seedi deliver tangible results in plants height. D treatment (application of fertilizer 3 times a week) showed good results in plant compared with other treatment.Keywords : Gyrinops caudata, Agarwood, foliar fertilizer Gandasil D
PERTUMBUHAN Gyrinops caudata (Gilg) Domke PADA LAHAN DENGAN KEDALAMAN MUKA AIR TANAH YANG BERBEDA Habdi Selpia; Johan A. Rombang; Marthen T. Lasut; Josephus I. Kalangi
COCOS Vol. 6 No. 11 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i11.8395

Abstract

ABSTRACT   This research studiet the growth of Gyrinops caudata on land with tho different ground water depths, around 45 - 50 cm below soil surface at A location  and 90 - 98 cm below surface at B location.  The method used in this study was a comparative method and the determination of plant samples was carried out in accordance with the purpose of the research (purposive sampling).  The measured variables were trunk diameter and the height of free branch trunk.  The number of samples measured in this study were 6 (six) trees, three (3) trees in A location and three (3) trees in B location. Trunk diameter was measured using a measuring tape at a height of 30 cm from the ground and the free branch trunk height was measured from the ground up to the first branch.  Measurements were carried out once a month in one year.  The results showed that increments in the trunk diameter and the free branch trunk height at B location were greater than at A location. Keywords: Growth Gyrinops caudata, Agarwood, Agarwood tree, Growth Rate.
Analisis Koefisien Kekasaran Sungai Di Sungai Sario Dengan Persamaan Manning Adenancy A. Montjai; Johan A. Rombang; Josephus I. Kalangi
COCOS Vol. 6 No. 12 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i12.8633

Abstract

ABSTRACT Analysis of River Roughness Coefficient in Sario River with Manning Equation Sario river is the main river of Sario Watershed.  Due to rapidly increasing population, protected area alongside river border had become settlement.  This causes a decrease of river channel capacity so that flood could happen as a case in January 2014.  Manning equation is the formula frequently used to calculate the flow capacity of open channel. The purpose of this research is to determine roughness coefficient of Sario River by using Manning equation. This research was done in three months starting from January 2015 to March 2015.  Observed and measured variables were river width, top width, bottom width, water depth, river channel depth, river pseudosection profile, flow velocity, gradient of bottom channel, and channel description.  Method applied was survey method and the determination of measurement and observation points was done with certain consideration (purposive sampling).  The averages of calculated roughness coefficients of Sario River are 0,049 for upstream, 0,050 for middlestream, and 0,060 for downsrtream. The average of Sario River roughness coefficient is 0,048.  Garbage and water countaining dispersed particles caused roughness coefficient greater than secondary data for natural channel. Keywords : River Roughness, Manning equation, Sario River
PENGARUH PEMBERIAN PUPUK KOMPOS TERHADAP PERTUMBUHAN BIBIT JABON MERAH (Anthocephalus macrophyllus) Etivera Safuf; Alfonsius Thomas; Johan A. Rombang; Josephus I. Kalangi
COCOS Vol. 6 No. 17 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i17.9840

Abstract

ABSTRACT  This research studies the effects of compost fertilizer on the growth of red jabon (Anthocepalus macrophyllus) seedling. The method used is completely randomized design, with 5 treatments and 5 replications. No (zero) compost was applied on treatment A as a control, 25 grams of compost on treatment B, 50 grams of compost on treatment C, 75 grams of compost on treatment D, and 100 grams of compost on treatment E. Based on recommendation, growth media used in this research was a mix of soil and sand, with a ratio of 3:2. Variables observed were increase in plant height, increase in stem diameter, increase in number of leaves, and the dry weight of shoot. Results showed that the application of compost fertilizer to red jabon seedling made significant differences in the increase of plant height and stem diameter. Key words: red jabon seedling (Anthocephalus macrophyllus) compost fertilizer  zeorganik
Fenologi Pohon Angsana (Pterocarpus indicus) Di Kota Manado. Tepenur Weya; Johny S. Tasirin; Martina A. Langi; Josephus I. Kalangi
COCOS Vol. 7 No. 2 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i2.12015

Abstract

ABSTRACTThis research is aimed to study the phenology of angsana trees in the urban areas of Manado city. Sam Ratulangi street is divided into five observing segments with relatively the same number of trees at about 129-131 at each segment giving a total of 651 trees. The phenology observed at each tree including leaf, flower, and fruit phenomenon. The diameter of each tree are measured. Trees were then greuped into five categories:<10, 10-<20, 20-<30, 30-<40 and ≥40 cm. The results shows that angsana trees in Sam Ratulangi street had diameter of about 3.4-50.5 cm.The highest accumulation at trees was at last fourth categories ranging at 132-185 trunks. The phenology of leaves which dominate the entire segments on Sam Ratulangi street are green leaves at 89.9%of the 651 trees.The shoot phenology was performed by 11-20 trees (1.7-3.1%) and the flowering phenomena were found in 17-20 trees (2.6-3.8%). The flowering phenomena was mostly found at segment 1 (zero point) and becoming less and less toward the upper segments (Citraland intersection). The fruiting phenology shows and an opposite trend. The new flowering phenology are found on trees in three categories at medium diameters (10-40 cm) while the phenology of fruiting are found on trees with large diameters (>20 cm).
Pengaruh Media Tumbuh Kompos Terhadap Pertumbuhan Bibit Jabon Merah (Anthocephalus Macropyllus) Chandra C. Mosooli; Marthen T. Lasut; Josephus I. Kalangi; Jos Singgano
COCOS Vol. 7 No. 3 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i3.12301

Abstract

ABSTRACTThe Research Anthocephalus growth macrophyllus (Roxb.) Havil) at various doses of compost have been carried out in the greenhouse of Faculty of Agriculture, forestry science courses Unsrat. The purpose of this study was to determine the effect of the growing medium compost on growth Anthocephalus macrophyllus. This study uses a randomized block design (RBD), with five treatments and five replications each test consists of 6 plants. Compost growing media treatment levels given are A control (without fertilizer) B (0.5 kg), C (1kg), D (1.5 kg), E (2kg). variable observed that the increase of plant height, stem diameter increase, in the number of leaves, root volume and dry weight of the plant. This study uses a randomized block design (RBD).The results showed that the growing medium compost significant effect on the growth of high and volume root crop seeds Anthocephalus macrophyllus. And the effect of high growth and volume Anthocephalus best root seedling compost macrophyllus is giving treatment that is as much as 1.5 kg at treatment D.Keyword : Compost, Seed Growth Anthocephalus macrophyllus
PENGARUH BEBERAPA JENIS PAKAN TANAMAN KEHUTANAN TERHADAP KUALITAS DAN KUANTITAS KOKON ULAT SUTERA EMAS (Cricula trifenestrata Helf) Hartono .; Terry M. Frans; Josephus I. Kalangi
COCOS Vol. 7 No. 5 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i5.13765

Abstract

ABSTRACTTHE INFLUENCE OF SOME KIND OF FORESTRY FEED PLANTS TO THEQUALITY AND QUANTITY OF Cricula trifenestrata Helf COCOONSThe research aims to look at the influence of some types on liking of forestry plantsfeed (preference), life cycle, and the quantity and quality of gold silkworm cocoons C.Trifenestrata. This research was conducted from July to October 2015. Data collection wasperformed by the method of completely randomized design (CRD). Data collection wasperformed by completely randomized design (CRD) method.Specifically to see the effect on the quantity of cocoon, research using the completelyrandomized design (CRD) method. Observation is done by counting the number of larvae oneach type of feed. Data were analyzed to find the value of the average percentage for eachtype of feed.The results showed that avocado feed into the main host of C. trifenestrata forpreferred and easy to digest, and provide the best effect against the liking (preference) that is: 24.5%, while eating cinnamon lower than the avocado feed 22.2%, compared to eatingavocado and cinnamon Nantu feed have a lower preference level that is 19.2%, a lower levelcompared to eating avocado, cinnamon, Nantu feed, indicated by the cempaka feed that is17.7%, while feed with the lowest preference level is mahogany feed with 16.7%. TheAverage of long life cycle of insects that are kept on each type of feed as the host,respectively : Cempaka (61,7 days), Mahogany ( 55,9 days), Nantu (49,3 days), Avocado(72,3 days), dan Cinnamon (64,7 days). Avocado feed give the best effect on the quantity ofcocoons prodeced, that is: cocoons weight (95,56 g), heavy leather cocoons (13,9 g), andpercentage cocoons leather (27,07 g). Avocado feed give the best effect on the quality ofcocoon formed (shape and cocoons colour)Keyword : Liking research (preference), Cricula trifenestrata Helf, wood.
Co-Authors Adenancy A. Montjai Adenancy A. Montjai, Adenancy A. Alfonsius . Thomas Alfonsius Thomas Alfonsius Thomas Alfunsius Thomas Aruan Tasik, Hestika Astuti Anna Beka’ Belly Ireeuw Caroline N.A.C. Tasirin Chandra C. Mosooli Chandra C. Mosooli, Chandra C. Christien N. Kendek Claudio Bonifasius Cristina Lestary Sihaloho Dina Juanita Etivera Safuf Etivera Safuf, Etivera Fabiola B. Saroinsong Fabiola B. Saroinsong Fabiola B. Saroinsong Fabiola Baby Saroinsong Fadli Rahman Habdi Selpia Habdi Selpia, Habdi Handiward Tonoro Hartono . Hengky D. Walangitan JOHAN A. ROMBANG Jos Singgano Jos Singgano, Jos Josea Singgano Jouke G. Watratan Lidia Anike Pandeirot Luh Putu Ratna Sundari Mairi, Andhika K.B. Maria Y.M.A. Sumakud Marthen T. Lasut Marthen T. Lasut Martina A. Langi Martina A. Langi Meity Rantung Nastasia Irene Potoboda Nonong Krisnawati Loha Paembonan, Mutiara Piekarsa Paembonan, Nista Paembonan Pangemanan, Euis F. S. Patinggi, Febi F. Prestin Babo Randi Purba Reynold P. Kainde Reynold P. Kainde Rizky Nurhalizah Karim Santi . Lumingkewas Saroinsong, Fabiola Baby Semuel P. Ratag Semuel P. Ratag Serly Lumabi Sihaloho, Cristina Lestary Sukarman Hi. Jafar Telji Y. Palemba1, Tepenur Weya Tepenur Weya, Tepenur Terry M. Frans Wawan Nurmawan Zega, Wina Arlina Zulfitri Lawe