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Semuel P. Ratag
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Agriculture, Biological Sciences & Forestry

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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
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
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
ZONASI TUMBUHAN UTAMA PENYUSUN MANGROVE BERDASARKAN TINGKAT SALINITAS AIR LAUT DI DESA TELING KECAMATAN TOMBARIRI Kendy H. Kolinug; Martina A. Langi; Semuel P. Ratag; Wawan Nurmawan
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
PENDAPATAN USAHA TANI AGROFORESTRI TRADISIONAL PADA BEBERAPA KEMIRINGAN LAHAN DI KELURAHAN KINALI KABUPATEN MINAHASA Mildsty Tarore; Semuel P. Ratag; Hengki D. Walangitan; Euis F.S. Pangemanan
COCOS Vol. 6 No. 1 (2015)
Publisher : Universitas Sam Ratulangi

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Abstract

ABSTRACTTHE FARMING BUSINESS INCOME OF TRADITIONAL AGROFORESTRY ON SOME SLOPE AT KINALI VILLAGE-MINAHASA REGENCYThis research aims to analyze the farmer’s income of agro-forestry farmland based on slope declivity. This research was run on May-June 2014 at Kinali Village Kawangkoan Sub-regency Minahasa regency. The Method was used in this research was purpossive, 10 units of farmlands were chosen based on three cluster of slope. They were 0-15 degrees, >15-30 degrees and >30 degrees. The implementation of traditional agroforesrty system in Kinali village give higher income to farmer than monoculture system. The income from seasonal plants give contribution from Rp. 1.000.000,- to Rp. 3.000.000,- per planting season. Besides contribution of woody plants income are from Rp. 2.000.000 to Rp. 118.785.000. The income from woody plants is potential value based from stumpage value that grow there.Key words; farming business income, agro-forestry, Kinali Village, slope
PERSEPSI MASYARAKAT KELURAHAN KASAWARI KECAMATAN AERTEMBAGA KOTA BITUNG PROVINSI SULAWESI UTARA TERHADAP KEBIJAKAN PENGELOLAAN TAMAN WISATA ALAM BATUANGUS Yusuf L. Tamarol; Reynold P. Kainde; Semuel P. Ratag
COCOS Vol. 6 No. 13 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i13.8635

Abstract

ABSTRACT  Has conducted research that aims to describe the Kasawari community perception of the policy management of Batuangus Nature and Tourism Park. Research conducted at the Kasawari Village, Aertembaga District, Bitung City, Province of North Sulawesi. Research conducted by interview using the questionnaire at 73 respondents, and then grouped the data obtained, interpreted and studied descriptively. Results of the study is that Kasawari people know of the existence of  Batuangus Nature and Tourism Park but perceive it as a protected forest that has not been beneficial. Communities know that there is a regulation and legislation and community forestry agree with the prohibitions and sanctions contained therein. Public perception related to the preservation of Batuangus Nature and Tourism Park tends to favor the management policy. Public perception of community empowerment as an activity that is positive but need to consider the types of assistance that can support the majority of community work. In addition, the public perceives well too for extension activities. The Identity of management institutions not so well known by the public, according to the public perception that all of government agencies on duty in the forestry sector is the manager of Batuangus Nature and Tourism Park. There are two (2) main hope related people management policies Batuangus Nature Park namely the availability of water and the positive impact of the optimization function of Batuangus Nature and Tourism Park.    Keywords : perception, policy, Batuangus NTP
PENDAPATAN USAHA TANI POLA AGROFORESTRI BERBASIS KELAPA (Cocos nucifera) DAN TALAS (Colocasia esculenta L) DI DESA KLABAT, KABUPATEN MINAHASA UTARA Rahmiyanti Kader; Hengki D. Walangitan; Semuel P. Ratag; Maria Y.M.A. Sumakud
COCOS Vol. 7 No. 5 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i5.13847

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
PARTISIPASI PEREMPUAN PADA PENERAPAN AGROFORESTRI DI DESA WAREMBUNGAN KECAMATAN PINELENG Sitti S. Umagap; Semuel P. Ratag; Hengki D. Walangitan
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
PENGARUH EKSTRAK DAUN JABON, MAHONI DAN CEMPAKA TERHADAP PERKECAMBAHAN BENIH JAGUNG DAN KACANG TANAH Yanto Dolame; Maria Y.M.A. Sumakud; Semuel P. Ratag
COCOS Vol. 7 No. 7 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i7.14062

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.
RESPON PERTAMBAHAN DIAMETER Gyrinops caudata TERHADAP DUA KOMBINASI PUPUK Yusak M. Dori; Marthen T. Lasut; Semuel P. Ratag
COCOS Vol. 8 No. 3 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.14955

Abstract

ABSTRACT Gyrinops caudata an agarwood-producing plants are of good quality, so the price on the market also increased tailored to the needs of the present. To meet the demand of the market it is necessary to improve the welfare of farmers cultivation of agarwood and reduce the level of damage to forests from natural forests aloes search uncontrollably. Cultivation of this crop requires the application of techniques and methods that aim to spur growth in order to produce quality results and growth in accordance with the growing age. This study aims to investigate the response of fertilizer given to plants producing agarwood by using the experimental method, the observed data were analyzed using the F-test (variance) to determine the spread of the data and proceed to the t-test to determine the level of difference in the increase in diameter of the two group of plants. Through the analysis of test-f and proceed to the t-test concluded that the treatment that is given in plant with a combination of fertilizer, NPK and added foliar fertilizer (bayfolan) accreting diameter better than combination fertilizers that do not add foliar fertilizer Bayfolan.Key words : Agarwood, Gyrinops caudata, Fertilizers, Bayfolan, Experiment.
Co-Authors D. Faryanti Dolame, Yanto Eka Maryuni Toding Euis F. S. Pangemanan Euis F.S. Pangemanan Hengki D. Walangitan Hengki D. Walangitan Ibrahim . Josephus I. Kalangi Kader, Rahmiyanti Kendy H. Kolinug Maria Y.M.A. Sumakud Marthen T. Lasut Martina A. Langi Martina A. Langi Mega Masyita Gusti Mildsty Tarore Rahmiyanti Kader Randi Purba Reynold P. Kainde Reynold P. Kainde Risal Umalekhoa Ruth Polii Sitti S. Umagap Umagap, Sitti S. Wawan Nurmawan Yanto Dolame Yaromi Yoman Yuliyana Christina Laratmase Yusak M. Dori Yusuf L. Tamarol Yusuf L. Tamarol, Yusuf L.