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Meldi T.M. Sinolungan
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INDONESIA
COCOS
Published by Universitas Sam Ratulangi
ISSN : -     EISSN : 27150070     DOI : 10.35791
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal ini memuat materi yang berkaitan dengan Pertanian. Menyangkut Tanah, Budidaya Pertanian, Proteksi Tanaman, Teknologi Pertanian dan Sosial Ekonomi Pertanian
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 831 Documents
 52   53   54   55   56 
Fenologi Tajuk Pohon Mahoni (Swietenia macrophylla King) di Areal UNSRAT Nepi Tabuni; Hard N. Pollo; J. S. Tasirin
COCOS Vol. 9 No. 6 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.20568

Abstract

ABSTRACT  Temporal variation in canopy phenology of Mahogany Tree (Swietenia macrophylla King) is a general pnenomenon that happened in field plantations.  Seasonal timing in case of early - late shoot emergence, leaf shading, flower emergence, and fruit maturation are life cycle events that can be used to predict flowering patterns and reproductive success.  Mahogany tree vegetation in UNSRAT area is one of isolated population that interested to be considered.    The aims of this research was to study temporal variation in canopy phenology of Mahogany Tree.  The researh was done by Cencus Method from May to June 2017.  The data were analysed by using descriptive statistics.  The result showed that from the 346 tree visually observed, there are 134 trees have new shoot emergence,  189 trees have young leaves, 26 trees have yellow color leaves for shading, 4 trees in stage of flowering emergence, 82 trees in fruiting stage, 6 trees has fallen fruits, and 1 tree has contain young fruit.  These imply that the canopy phenology of mahagony tree has high variation in response to its ambient condition.  Keywords : Mahogany Tree, canopy phenology, temporal variation, seasonal timing, UNSRAT
Pendugaan Evapotranspirasi Bulanan Tanaman Padi Sawah dengan Menggunakan Model Simulasi Tanaman di Kabupaten Jayawijaya Provinsi Papua Yitenus Tabuni; Jelie Viekson Porong; Johannes E.X. Rogi
COCOS Vol. 9 No. 6 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.20573

Abstract

ABSTRACT   Rice is the second staple supplies in Jayawijaya Regency of Papua product beside Sweet potato. The area of rice plant is 250 ha, with production of 655 tons (BPS data from the Department of Agriculture of Food Crops and Horticulture of Papua Province 2014). The total area of Jayawijaya Regency is 13,925.31 km2 which is administratively divided into 40 districts with 4  Kelurahan, and 328 Villages. The Population area 241. 280 inhabitants. Most of the people live on slope of the hills  whith are difficult to reach and are of temhisby long dryness. The estimation of the evapotranspiration in this research uses a plant simulation model. The purpose of this simulation model has advantages, among others, does not require a long time to utilize the results and cost efficient in terms of cost. This study aims to estimate the monthly evapotranspiration of wetland rice crops in Jayawijaya Regency Papua Province by using shierary rice.Ve2 2, 1. The results of research can be used as a tool for cultivating rice crops especially for water management. The growth model is a simple representation of the plant growth system described in the mathematical model and analyzed statistically. The advantages are derived from the using of model simulations, that such as can shorten the time to predict the potential of crop production.  Keywords: Evapotranspiration estimation of field and model results
STRUKTUR DAN KOMPOSISI POHON DI HABITAT BURUNG MALEO (Macrocephalon maleo S. Muller, 1846) DI TANJUNG BINEREAN, DESA MATAINDO Riyanto Silayar; Hard N. Pollo; Johny S. Tasirin
COCOS Vol. 9 No. 6 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.20612

Abstract

ABSTRACT Macrocephalon maleo S. Muller, 1846, an endemic bird species to Sulawesi and classified as Endangered, is now used as flagship species for conservation purpose. Conversion of its habitat, habitat loss and fragmentation, and degraded habitat quality are several suspected factors that impacted the bird population. Its habitat in Tanjung Binerean at Mataindo Village, South Bolaang Mongondow Regency is now suspected to be declined in form of habitat quality. The aims of this research was to analyze Maleo Bird's habitat based on tree structure and composition. The researh was done in Tanjung Binerean at Mataindo Village, South Bolaang Mongondow Regency in June 2017 by Systematic Strip Method. Data were collected from three transects on 25 plots, and were analysed its relative frequency distribution. The result showed that there were 56 tree species that dominated by Alianthus integrifolia (21,23 %), Cananga odorata (12,16 %), Canarium asperum (8,82 %), and Ficus septica (8,32 %). This imply that the Maleo's habitat is now in disturbed condition with the presence of F. septica.Keywords : Macrocephalon maleo, South Bolaang Mongondow Regency, habitat, flagship species, Ficus septica
DESKRIPSI VEGETASI HUTAN MANGROVE DI DESA PUNGKOL, KECAMATAN TATAPAAN Hardy Senen; Marthen Th. Lasut; Johny S. Tasirin
COCOS Vol. 9 No. 6 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.20654

Abstract

ABSTRACT  Pungkol Village is an important area of mangrove forest located on the northern coastal part of North Sulawesi.  The aims of this research was to describe mangrove plant species found at Pungkol Village area by Cencus Method.  Research finding on 25 ha mangrove area showed that there were 17 major species group, which are Avicennia marina, Avicennia officinalis, Avicennia rumphiana, Aegiceras floridum, Bruguiera gymnorrhiza, Bruguiera parviflora, Bruguiera sexangula, Ceriops tagal, Ceriops decandra, Rhizophora apiculata, Rhizophora mucronata, Rhizophora stylosa, Sonneratia alba, Sonneratia ovata, Thespesia populnea, Xylocarpus granatum dan Xylocarpus moluccensis.  The plants are grouped in 16 families, they are Avicenniaceae, Rhizophoraceae, Myrsinaceae, Sonneratiaceae, Meliaceae and Malvaceae.  Rhizophoraceae has the highest number of species found (8 species), followed by Avecenniaceae (3 species).  Keywords : Pungkol Village, mangrove forest, species description
KELIMPAHAN JENIS SATWA LIAR DI TANJUNG BINEREAN KECAMATAN PINOLOSIAN TENGAH KABUPATEN BOLAANG MONGONDOW SELATAN Nicodemus Malir; Marthen T. Lasut; Johny S. Tasirin
COCOS Vol. 9 No. 6 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.20655

Abstract

Binerean cape retains a high biodiversity, including the diversity of wildlife species. This research aims to know the abundance of wildlife species using camera traps in South Bolaang Mongondow Regency. The data was taken using Bushnell trophy-cam and Reconyx camera traps. The results show that there are 15 species from 13 families of wildlife in Binerean Cape. The most abundant wildlife species is the macaques (Macaca nigra) at 65.3% with an encouter rate of 4.61 photos/days. It is followed by Sulawesi wild boar (Sus celebensis) with 13.5% abundance or 0.96 photos/day camera trapping. Third abundance is Sulawesi rats (Paroromys sp.) at 13.2% abundance and 0.93 photos/day. The lowest abundance at 0,1%  or less are common emerald doves (Chalcophaps indica), red-bellied pitta (Pitta erythrogaster), whitish dwarf squirre (Prosciurillus leucomus), common water monitors (Varanus salvator), dan red-backed thrush (Zoothera erythronota). Keyword: Headland Binerean, Animals Wild, Species diversity
UJI ANTAGONISME Trichoderma spp. TERHADAP Phytophthora palmivora PENYEBAB PENYAKIT GUGUR BUAH KELAPA Ryan A. Kaunang; Berty H. Assa; Vivi B. Montong
COCOS Vol. 10 No. 1 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i3.20865

Abstract

ABSTRACT  The deciduous fall of coconut fruit is caused by Phytophthora palmivora fungus.  This study aims to determine the ability of Trichoderma spp. Inhibiting P. palmivora on PDA media in vitro.  Research method used experimentally, that is antagonism test with method of dual culture method. P. palmivora in isolation from coconut fruit showing symptoms of the disease. The results showed that the antagonistic fungus Trichoderma spp could suppress the growth and development of the P. palmivora fungus, the average percentage of inhibition of the antagonistic fungus Trichoderma spp. of the pathogenic fungi of P. palmivora in vitro on PDA media on the fifth day is (100%) for simultaneously inoculated antagonism test and (40,62%) for antagonism test wherein antagonistic inoculation 4 days after pathogen. On the seventh day, the average percentage of inhibition of the antagonistic fungus Trichoderma spp. of the pathogenic fungus P. palmivora is (100%) for both treatments of this antagonism test.  Key Words: Coconut Nut Fall, Phytophthora palmivora, Antagonist
ANTAGONISME Trichoderma sp. TERHADAP Alternaria porri PATOGEN PENYAKIT BERCAK UNGU TANAMAN BAWANG MERAH PADA BEBERAPA MEDIA Yukiko N.K Susandi; Denny S. Sualang; Meisye H.B. Paruntu
COCOS Vol. 10 No. 1 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i3.20866

Abstract

ABSTRACT  Alternaria porri is pathogen causes purple blotch disease of shallot, and one of important constraints to increase agricultural production. Trichoderma spp. is one of the biological agents that known have antagonistic ability against the pathogen. This study aims to determine the antagonist Trichoderma sp. against the pathogen of Alternaria porri causes purple blotch disease of shallot on several media. Antagonism test implemented by using dual culture method on PDA media, leaf shallot extract media, and leaf shallot extract media + ½ PDA. The result is Trichoderma sp. is able to inhibit the growth of Alternaria porri on the treatment medium. Based on the inhibit percentage of Trichoderma sp. against A. porri,  Trichoderma sp. on PDA media more faster to inhibit than leaf shallot extract media, and leaf shallot extract media + ½ PDA because the good nutritions in PDA media.  Keywords: Alternaria porri, Trichoderma sp. purple blotch disease
ANALISIS POTENSI TEGAKAN HUTAN RAKYAT JENIS CEMPAKA DI DESA KAWATAK KECAMATAN LANGOWAN SELATAN Nurbaya Waisaley; Alfonsius Thomas; Wawan Nurmawan
COCOS Vol. 10 No. 1 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i3.20868

Abstract

ABSTRACT Cempaka a large evergreen tree species, is one of well-know timber grow in the community forest of North Sulawesi, including in Kawatak Village, South Langowan District, Minahasa Regency. Cempaka Wasian in Sulawesi Could be divided into two  species of Magnolia genus, which are Magnolia Sulawesiana and Magnolia Tsiampacca. This research aims to discover the forest stand’s potential of cempaka in Kawatak Village, South Langowan District, Minahasa Regency. The data were collected by generating sample plots with a target of 20 sample plots taken from 12 plantations with the size of 20 x 20 m plot area. In general, the existing community Forest in Kawatak Village is mixed  planting pattern model spreading farmers’  land. The average volume of people‘s plantations are 185.63³ with the average volume of plantations stand of 1.177,54 m³.  Keywords : Community Forest, Cempaka Potential, Kawatak Village.
EFISIENSI LAPANG ALAT TANAM BENIH LANGSUNG (TABELA) PADI SAWAH DENGAN MENGGUNAKAN TRAKTOR TANGAN SEBAGAI TENAGA TARIK Feryatmono O. Geso; Ruland Rantung; Daniel P M. Ludong
COCOS Vol. 10 No. 1 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i3.20869

Abstract

ABSTRACTThis study aimed to calaulete the field efficiency of direct seed planting equipment (Tabela) using a hand tractor as a pulling tool. The field evaluation was conducted on an area of 120 m2 that was divided into 3 plots. In this study the distance between planting rows was 20 cm, the legowo rows distance was 40 cm the average of planting depth was 1,4 cm, the the seed number each hole was 3-7 seeds and the average was 4 seeds. The results showed that the field efficiency was 53,53 %. This direct seed planting equipment reduced the number of labors and working time.  Keywords : Tabela tool, Hand Tractor, Legowo
MODEL SISTEM PAKAR DALAM MENGIDENTIFIKASI PERMASALAHAN PADA JARINGAN IRIGASI PERTANIAN DI BENDUNG TALAWAAN Richard A.V. Koloay; David Rumambi; Robert Molenaar
COCOS Vol. 10 No. 1 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i3.20871

Abstract

ABSTRACT  This study aims to obtain information about the problems that occur in irrigation networks at the right part of Talawaan dam and produce a computer application model as an expert system. It is hoped that this expert system application can be useful to provide information about the problems that occur in the irrigation network in Talawaan dam, especially on right Talawaan irrigation networks and can provide solution of the problem through an expert system application that can be accessed by each user. This research was conducted in the Technical Laboratory of Agricultural Faculty of Agriculture Technology Department of UNSRAT and in Talawaan dam, Talawaan Subdistrict, North Minahasa Regency, North Sulawesi Province, and divided into two stages: irrigation network data collection and expert system application development.  Data collection on right Talawaan dam is done by calculating inflow water discharge and outflow water discharge and evaporation on primary, secondary and tertiary channel then documentation on problems that occur on irrigation channel. There is a water loss of 0.187 m3 / sec on the primary channel, 0.213 m3 / sec of water loss in secondary channels, and water loss of 0.074 m3 / sec on tertiary channels. Factors that cause water loss include the problem of damage to irrigation channels, garbage accumulation, illegal water taking, and silting of channels by mud. With this expert system, users can get information on problems that occur on irrigation channels and can consult to find solutions to the problem.  Keywords: Irrigation Network and Expert System

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