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Semuel P. Ratag
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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
ZONASI TUMBUHAN UTAMA PENYUSUN MANGROVE BERDASARKAN TINGKAT SALINITAS AIR LAUT DI DESA TELING KECAMATAN TOMBARIRI Kolinug, Kendy H.; Langi, Martina A.; Ratag, Semuel P.; Nurmawan, Wawan
COCOS Vol 5, No 4 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i4.6561

Abstract

ABSTRACTThis research was conducted to test the relation between salinity and distribution pattern of mangrove vegetation in Teling, district of Tombariri. This research aimed to describe the distribution of main zones of mangrove plant species in relation to the salinity of sea water in Teling, district of Tombariri. This research was conducted from July to August 2014 at the mangrove forest at Teling, the district of Tombariri, North Sulawesi. This research used the combination of plot and line method. There is mangrove zonation in Teling District of Tombariri which consists of (from the sea to the mainland) Sonneratia zone (zone 1), Rhizophora zone (zone 2), and Bruguiera zone (zone 3). Zone 1 is located in the outer portion or directly adjacent to the sea. Zone 2 is between Sonneratia zone and the adjecent land. Zone 3 is located at the rear of Rhizophora zone and only found on one track at the research site. The average salinity values on Sonneratia zone range from 33 ‰ to 35,5 ‰, whereas the range for Rhizophora is from zone 31,8 ‰ to 33,7‰ and Bruguiera zone is 33‰.Keywords: Mangrove, Bunaken National Park, Zoning, Salinity
KERAGAMAN JENIS TANAMAN PADA SISTEM AGROFORESTRI PEKARANGAN DI DESA WAREMBUNGAN Yoman, Yaromi; Pangemanan, Euis F.S.; Ratag, Semuel P.
COCOS Vol 1, No 2 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.20108

Abstract

ABSTRACT  The traditional agroforestry homegarden in the village when judging from the vegetation composition it have interesting characteristics. Village homegarden ecosystems have a very diverse ecosystem service function and play an important role in the lives of rural communities. The purpose of this research is to know the diversity of plant species in agroforestry homegarden in Warembungan Village. The method used in this research is the interview method by using questionnaires as a means of collecting primary data and secondary data and direct field observation Based on the results of research in Warembungan Village, Pineleng District found 53 species of homegarden plants. The diversity of plant species consists of 24 families. The diversity of plant species consists of 24 families. Most of the homegarden plants are spices with 279 plants, 257 fruits plants, and 180 vegetables plants. Meanwhile, 159 tuber plants 90 ornamental plants, and 82 timber plants.Total individu 1,047 plants and the location of front, side and back of respondent's house.  Keywords :Diversity of plant, types, agroforestry, homegarden
ANALISIS CADANGAN KARBON DI HUTAN MANGROVE DESA BAHOI Polii, Ruth; Tasirin, Johnny S.; Ratag, Semuel P.
COCOS Vol 1, No 2 (2019)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.24326

Abstract

Bahoi Village has an area of mangrove forest which is estimated to be as large as 36 ha which is well preserved by its people. The use of mangrove forests that do not consider the ecological role of mangrove forests can be one of the biggest threats to their sustainability. This study aims to calculate the stored carbon stock and species dominance in the Bahoi Village mangrove vegetation. This research is expected to be a source of data and information on carbon reserves, tourism management, species conservation, or sustainable production in Bahoi Village. The research method is systematic plot sampling. There were 15 plots with 5 plots each in 3 different cover types namely residential, tourism trail, and open tourism areas. Analysis of carbon stocks used alometric equations, structure and composition used INP, the results shows that carbon reserves are mostly in Sonneratia alba (64.41 kg / ha), followed by Bruguiera cylindrica (44.54 kg / ha), Rhizophora mucronata (43.04 kg / ha), Bruguiera gymnorhiza (35.88 kg / ha), Ceriops tagal (28.77 kg / ha), and the lowest Rhizophora apiculata ( 16.80 kg / ha). The highest carbon stock is found in residential area (45,39 kg/ha) followed by tourism trail (36,59 kg/ha) and open tourism area (29,29 kg/ha). Keywords: Mangrove Forest, Carbon, Bahoi
PARTISIPASI PEREMPUAN PADA PENERAPAN AGROFORESTRI DI DESA WAREMBUNGAN KECAMATAN PINELENG Umagap, Sitti S.; Ratag, Semuel P.; Walangitan, Hengki D.
COCOS Vol 7, No 5 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i5.13848

Abstract

ABSTRACTWoman Participation in the Implementation of Agroforestry in the Village of Warembungan, sub-District of PinelengIt is well known that woman has certain participation level varied from household activities to a broader sense such as participation in household income generating. With the exception to woman monthly income that valued in rupiahs, it is very rarely that contribution value of woman participation is quantified. This is happened to all woman community at city and village level as well. At village level, where farming effort ast as prime mover of household economy, it is estimated that the smaller the number of family member, the higher the participation level of woman contribution in farming activities. Warembungan Village, Subdistrict Pineleng is a sample of village where the farming effort in form of agroforestry applied to fulfill the family needs. It is therefore, woman participation level in order to establish its contribution value needs to be quantified. This study aimed to describe the level of woman participation in agroforestry activities, and to further analyze the relation between woman participation and socio-economy factors. Research was conducted in Warembungan Village, subdistrict Pineleng using structured questioner survey analyzed descriptively and then using Chi-square (x2) to see the relation mentioned above. Results showed that the level of participation of women classified as medium category with a percentage of 80%, The female participation rates no significant correlation with socio-economic factors,Keywords: woman participation, Warembungan, socio-economy factors
ANALISIS VEGETASI HUTAN LINDUNG GUNUNG TUMPA Kainde, Reynold P.; Ratag, Semuel P.; Tasirin, Johny S.; Faryanti, D.
EUGENIA Vol 17, No 3 (2011)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.17.3.2011.3547

Abstract

ABSTRACT   This research was carried out in the Mount of Tumpa Protection Forest from February to March 2003, aiming to asses Important Value (IV) Index.  Simple random sampling with plot was used to collect species data. The observation for collecting specie data was  number individual of each species, trees, poles diameter and species presence.  The data were analysed for density, relatif density, frequency, relatif frequency, dominancy, relatif dominancy and Important Values (IV) The results showed that at seedling level, Important Value of Tepu was the highest  (41,83%) and lowest was Calophyllum soulattri (10,03 %).  The highest Important Value at  the sapling level was Calamus sp (38,73%) and the lowest was Knema latericia (10,11%). The highest  Important Value at the pole level was Spathodea campanulata (74,01%) and the lowest was Dracontomelum mangiverum (10,05%).  The highest Important Value at tree level was Spathodea campanulata (88,86%) and the lowest was Calophyllum soulattri (10,22%). Keywords : Important Value Index, Vegetation Analysis
KANDUNGAN KLOROFIL DALUGHA (CYRTOSPERMA MERKUSII (HASSK.) SCOTT) PADA HUTAN RAWA PASANG SURUT DI DESA LAINE, PULAU SANGIHE Ratag, Semuel P.; Pangemanan, Euis F.S.; Tasirin, Johny S.
EUGENIA Vol 23, No 1 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.23.1.2017.15410

Abstract

ABSTRACT This article is to present the adaptation capacity of Dalugha (giant taro, Cyrtosperma merkusii) indicated by chlorophyll contents at a number of places in Laine Village, Sangihe Island.  The study is related to the development of Dalugha as an alternative food plant and its adaptation to the inundated brackish water as a result of raising sea water surface on climate change.  The aim of the study is to analyze the differences in chlorophyll contents of inundated and non inundated brackish water conditions in a tree shaded and non shaded conditions.  The method is observational where plant responses are observed at the variation created by natural caused.  The result showed cthat Dalugha chlorophyll content was influenced by tree shading but it is not influenced by inundation of brackish water. Keywords: dalugha, chlorophyll, tidal swamp forest
RESPON PERKECAMBAHAN BENIH SENGON LAUT (Paraserianthes falcataria (L.) Nielsen) TERHADAP ALELOPATI DAUN DAN RHIZOME ALANG-ALANG (Imperata cylindrica L.) Pangemanan, Euis F.S.; Ratag, Semuel P.
EUGENIA Vol 23, No 1 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.23.1.2017.15414

Abstract

ABSTRACT   A plant species can release a toxic compound which can inhibit the growthof other plant species.  The success of planting certain tree species, both inside and outside the forest area with agroforestry system can be affected by allelopathy of other plant species. The objective of this research was to study the response of sengon laut (Paraserianthes falcataria (L.) Nielsen) seed germination on cogongrass (Imperata cylindrica L.) leaves and rhizomes allelopathy. The experimental design was a randomized complete design with four replicates.  The treatments were leaves and rhizomes extracts of cogongrass, and water as control.  The results showed that the extract concentration of 20 % (weight/volume), then the sengon laut seed germination was not affected by the extracts. Keywords:  sengon laut, cogongrass, allelopathy, seed germination
PENGARUH EKSTRAK DAUN JABON, MAHONI DAN CEMPAKA TERHADAP PERKECAMBAHAN BENIH JAGUNG DAN KACANG TANAH Dolame, Yanto; Sumakud, Maria Y.M.A.; Ratag, Semuel P.
COCOS Vol 7, No 7 (2016)
Publisher : COCOS

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Abstract

ABSTRACTIn land-use commodities usually done by planting peanuts and corn along the tree, needs assessment of the impact of residues from tree Jabon, Mahogany and Cempaka. The research was conducted during the first week in November-December 2015. Every treatment gets 5 replications. Measurements alelopati influence on sprouts peanuts and corn were analyzed using analysis of variance (ANOVA). Leaf Extract Jabon, Mahogany and Cempaka alelopati shows that the effect does not interfere with the growth of sprouts in peanut seeds and corn. Keywords: Leaf extract, Allelopatih, Sprouts.
PENDAPATAN USAHA TANI POLA AGROFORESTRI BERBASIS KELAPA (COCOS NUCIFERA) DAN TALAS (COLOCASIA ESCULENTA L) DI DESA KLABAT, KABUPATEN MINAHASA UTARA Kader, Rahmiyanti; Walangitan, Hengki D.; Ratag, Semuel P.; Sumakud, Maria Y.M.A.
COCOS Vol 7, No 5 (2016)
Publisher : COCOS

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Abstract

ABSTRACTCoconut plantation areas in Indonesia, specifically in North Sulawesi by the owners are tendto use monocultural pattern with only one product, copra. Efficiency in using growing spaceand certain planting pattern in form of agroforestry and its combination will give reciprocalbenefits, i.e. the cleanness of coconut planting area could be maintained with a possibility ofincreasing in coconut product, and economical benefits by utilizing of the unused growingspace on the lower space of coconut plantation area. If the economical benefits could bequantified, application of agroforestry pattern could be practiced to a wider area. Applicationof agroforestry pattern between coconut trees (Cocos nucifera) and taro (Colocasia esculentaL) by farmers who work on coconut plantation area is one of the agroforestry pattern that hasbeen used in Klabat Village, North Minahasa Regency. Lacking in knowledge of economicalvalue of the agroforestry pattern applied is a motivation why this reseach was done. Theaimed of this research was to analyze farming revenue based on agroforestry patternapplication between coconut and taro at Klabat Village, North Minahasa Regency.Questionnaire and interview were employed to collect required data and information using 30purposive respondents. This concluded that planting of both crops in combination resulted inhigher revenues than that of monocultural planting.Key words: agroforestry, Klabat village, farming revenue