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Josephus I. Kalangi
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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ANALISIS KEBUTUHAN LUASAN RUANG TERBUKA HIJAU KOTA MANADO BERDASARKAN FUNGSI PENYEDIA OKSIGEN Rahman, Fadli; Kalangi, Josephus I.; Saroinsong, Fabiola B.
COCOS Vol 1, No 1 (2018)
Publisher : COCOS

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AbstractIncreased population indirectly resulted in the development of urban areas physically and tends to alter green open spaces into built areas to meet the needs and improve services to the population. As a result there is an increase in air temperature, decrease in ground water quality and urban air quality, and high noise level. The existence of urban green open space arrangement can overcome the development as well as to overcome the ecological impact of various disruption of human activities on the natural process in the City of Manado. Then to realize the ecological balance in the Manado city, there is need of green open space development approach that refers to the area and the need of oxygen. This study aims to calculate the area of green open space needed by Manado City based on oxygen supply function. Data analysis of green open space requirement based on area according to Law Number 26 Year 2007 and based on oxygen requirement using Gerakis formula (1974) modified by Wisesa (1998). The results show the green open spaces needed in Manado City area of 2953.45 ha. In meeting the needs of green open spaces Manado City based on the oxygen provider function then everyone is required to plant 3 trees, on an area of 25 m2.Keywords: green open space, oxygen demand, Manado City.
STUDI RIAP CEMPAKA ELMERRILLIA OVALIS (MIQ.) DANDY DI PINARAS DAN MASARANG Lawe, Zulfitri; Kalangi, Josephus I.; Thomas, Alfonsius; Rombang, Johan A.
COCOS Vol 4, No 1 (2014)
Publisher : COCOS

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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
Fraksi Radiasi Matahari pada Sistem Agroforestri Cempaka Solar Radiation Fraction in the Cempaka Agroforestry System Purba, Randi; Ratag, Semuel P.; Kalangi, Josephus I.
COCOS Vol 1, No 2 (2019)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.24168

Abstract

ABSTRACT  Plant growth and development depends on internal factors (genetic) and external factors (environment). Solar radiation (external factor) is an energy source needed in plant growth. In agroforestry systems the existence of woody species (trees) will reduce the level of light received by agricultural crops (annual crops). The purpose of this study was to determine the fraction of solar radiation in the Cempaka agroforestry system. The research was conducted in three locations, namely Lemoh Barat Village (295 masl), Rumoong Atas Village (489 masl) and Kinilow Satu Village (652 masl). Direct measurement of radiation using a solarimeter device placed in 3 observation points at each location, while the measurement of radiation fraction estimation was taken data of tree canopy width, tree height, tree spacing width and land area. The results of direct measurements of radiation obtained at the Lemoh Barat Village agroforestry area were 62%. Rumoong Atas Village were 51% and Kinilow Satu Village were 53%. The estimation results obtained by Lemoh Barat Village were 74%, Rumoong Atas Village were 62% and Kinilow Satu Village were 26%. Key words: Radiation Fraction, Agroforestry, Cempaka
PERANAN PENGGUNAAN LAHANDI AREA TANGKAPAN SUNGAI SUNGEAN TERHADAP EUTROFIKASI DANAU TONDANO Lumingkewas, Santi .; Rombang, Johan A.; Kalangi, Josephus I.; Saroinsong, Fabiola B.
COCOS Vol 2, No 1 (2013)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i1.731

Abstract

ABSTRACTEutrofication is one of the water pollution that caused by the increase ofthe consentrate of nutrient. This research studied conducted in catchment area ofSungean river sub DAS Noongan, Kab. Minahasa. The objective of this studywere to quantify the eutrofication’s rapid, in this case the value of Nitrogen andFosfor that caused by any land uses in catchment area of Sungean river sub DASNoongan.This research studied was done by taking the sample of water andquantifying water discharge in some point which had been chosen alongcatchment area of Sungean river that represent various land use. Then theconcentrate of N and P in water sample was analyzed in BARISTAND laboratory.Then the data of N and P That transported from each land uses, was analyzed instatistic with using Randomized Block Design (RBD) and spatial analisis(arcview).The result of research study showed that, each land uses gave effect tothe increase of lake eutrofication. Were in Tondano Lake from Sungean river forN was about 467,1076 mg/day and P was about 5,961849 mg/day. The biggestcontribution of N and P was from residential area, it was 464,2352 mg day-1 ha-1dan 5,961849 mg day-1 ha-1.Keywords : Eutrofikasi, Nutrient, River Of Sungean, Landuse
Fenologi Pohon Angsana (Pterocarpus indicus) Di Kota Manado. Weya, Tepenur; Tasirin, Johny S.; Langi, Martina A.; Kalangi, Josephus I.
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).
BEBERAPA SIFAT FISIK GUBAL ANGSANA (PTEROCARPUS INDICUS) Ireeuw, Belly; Kainde, Reynold P.; Kalangi, Josephus I.; Rombang, Johan A.
COCOS Vol 3, No 6 (2013)
Publisher : COCOS

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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
KENYAMANAN TERMAL RUANG TERBUKA HIJAU DI KAMPUS UNSRAT BERDASARKAN PERSEPSI PENGUNJUNG Babo, Prestin; Saroinsong, Fabiola B.; Kalangi, Josephus I.
COCOS Vol 1, No 2 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.14956

Abstract

ABSTRACT Comforts could be defined as psychological and physical comforts. Psychological comfort could be perchieved by safety, peace, and relaxant feeling that felt personaly and subjectively measurable. In the meanwhile, physical comfort could be measured objectively such as spatial, visual, auditorial, and thermal. Open spaces are public space that accessible either directly within limited or indirectly within undeterminate period of time. Open spaces could appear as roads, sidewalks, urban spaces such as townparks, forests, and other similar things. This manuscript discussed about thermal comfort that felt by human whose had activity on an urban green space (Ruang Terbuka Hijau or RTH) of The University of Sam Ratulangi. This research aimed to studying respondent perceptions on the point of thermal comfort on The University of Sam Ratulangi’s RTH. This research used purposive sampling to select the urban green spaces which frequently accesed, while respondents are randomly chosen. These following 11 RTH known to be accessed frequently, they are FMIPA, FAPERTA, FAPET, BANK BNI, FPIK, FATEK, FEB, FISIP, FH, FKM A, and FKM B. This research concluded the most comfortable RTH based on respondent perceptions is FKM B (100%); followed by FAPERTA (94.1%), FATEK (82.4%), FAPET (80%), FEB (69.2%), FPIK (65%), Bank BNI (63.6%), FH (53.8%), FMIPA (45.5%), FKM A (33.3%), dan di FISIP (26.3%). Keywords: Perception, Green open space, Campus UNSRAT.
PENGARUH BEBERAPA JENIS PAKAN TANAMAN KEHUTANAN TERHADAP KUALITAS DAN KUANTITAS KOKON ULAT SUTERA EMAS (Cricula trifenestrata Helf) ., Hartono; Frans, Terry M.; Kalangi, Josephus I.
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.
PERTUMBUHAN Gyrinops caudata (Gilg) Domke PADA LAHAN DENGAN KEDALAMAN MUKA AIR TANAH YANG BERBEDA Selpia, Habdi; Rombang, Johan A.; Lasut, Marthen T.; Kalangi, Josephus I.
COCOS Vol 6, No 11 (2015)
Publisher : COCOS

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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.
PENGARUH FREKUENSI PEMBERIAN AIR TERHADAP PERTUMBUHAN BIBIT JABON MERAH (ANTHOCEPHALUS MACROPHYLLUS (ROXB.) HAVIL) Jafar, Sukarman Hi.; Thomas, Alfonsius .; Kalangi, Josephus I.; Lasut, Marthen T.
COCOS Vol 2, No 2 (2013)
Publisher : COCOS

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ABSTRACTFrequency Effect on growth of seedlings water provision jabon Red (Anthocephalus Macrophyllus (Roxb.) Havil)The supply of water to the seeds of red jabon can enhance plant growth. In this research studied the effect of watering frequency on growth jabon water red. This study was conducted in Greenhouse Silviculture Faculty of Agriculture, University of Sam Rarulangi which runs from August s / d in October 2012. The purpose of this study was to determine the intensity of a good watering the seedlings growth jabon red. This study used an experimental method completely randomized design (CRD) with 4 treatments and 6 replications. Treatment A Watering the first time (600 cc), B is watering 2 times (300 cc), C is watering 3 times (200 cc) and D is Watering 4 times (150 cc). Growing media used in this study are basic media such as soil, sand and chicken manure with a ratio of 7: 2: 1. The parameters measured were plant height, diameter, leaf number, root volume, dry crown weight, temperature and humidity.The results showed that there is an influence on the frequency of watering is water height growth, diameter, number of leaves, root volume and dry weight of seedlings jabon red canopy. Watering 2 times a day (300 cc), can provide good results in high growth, diameter, number of leaves and dry weight of the canopy. While the root volume parameter, watering 4 times a day (150 cc) gives good results.
Co-Authors Adenancy A. Montjai, Adenancy A. Alfonsius . Thomas Alfonsius Thomas Alfunsius Thomas Babo, Prestin Belly Ireeuw Caroline N.A.C. Tasirin Chandra C. Mosooli, Chandra C. Christien N. Kendek Dina Juanita Etivera Safuf, Etivera Fabiola B. Saroinsong Fadli Rahman, Fadli Habdi Selpia, Habdi Handiward Tonoro Hartono Hengky D. Walangitan J. E.X. Rogi Johan A. Rombang Johny S. Tasirin Jos Singgano, Jos Josea Singgano Loha, Nonong Krisnawati Malsupri Taher Marthen T. Lasut Martina A. Langi Purba, Randi Reynold P. Kainde Santi . Lumingkewas Saroinsong, Fabiola Baby Semuel P. Ratag Sihaloho, Cristina Lestary Sukarman Hi. Jafar Telji Y. Palemba1, Tepenur Weya, Tepenur Terry M. Frans Zulfitri Lawe